A spraying dispensing gun

Abstract

The utility model discloses a spraying and dispensing gun, which comprises a body, a filtering device and at least two needle valves, two electromagnetic valves, a filter cavity is formed in the body, the filtering device is installed in the filter cavity, a first glue inlet hole for feeding is formed in the side of the body close to the filter cavity, the first glue inlet hole is communicated with the filter cavity for filtering raw materials, the two needle valves are both installed on the side away from the filter cavity of the body, at least two shunt channels are formed in the bottom of the filter cavity, one end of the two shunt channels is communicated with the filter cavity, the other end of the two shunt channels is respectively communicated with the input end of the two needle valves for transmitting the filtered raw materials, the raw materials are output through the output end of the needle valve for spraying and dispensing, the double spraying and dispensing actions or the single needle valve can execute different spraying and dispensing effects, time is saved, different spraying and dispensing effects can be realized when spraying and dispensing, at most two spraying and dispensing paths exist, different spraying and dispensing amounts or double enough spraying and dispensing amounts can be realized for products, and the spraying and dispensing quality is ensured.

Description

Technical Field

[0001] This utility model relates to the field of spraying and dispensing technology equipment, and in particular to a spraying and dispensing gun. Background Technology

[0002] A glue gun is a high-precision fluid control tool mainly used to accurately drip or coat liquid materials such as glue and paint onto products. It can achieve precise application or drawing of glue during product manufacturing, ensuring that each product can obtain a uniform and consistent liquid coating effect.

[0003] Chinese utility model patent (authorization announcement number: CN219400866U) discloses a handheld pneumatic dispensing gun for PUR hot melt adhesive, including a glue gun, a temperature controller, a pressure reducing valve, a base, a cable, and an air hose. The temperature controller is electrically connected to the heating cylinder of the glue gun via a cable, and the pressure reducing valve is connected to the control valve of the glue gun via an air hose. When the handle of the glue gun is pressed down, compressed air enters the hot melt adhesive cylinder of the glue gun, which presses the heated and melted adhesive out through the dispensing nozzle to complete the spraying of adhesive onto the target part. However, in actual production applications, when this glue gun sprays adhesive onto products, the spraying path of the glue gun is single, and the product is not firmly bonded after spraying adhesive. Therefore, the product still needs to be sprayed with adhesive a second time to achieve a sufficient amount of adhesive for better bonding in the next step. Utility Model Content

[0004] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution for a spray dispensing gun that can solve the aforementioned problems.

[0005] A spray dispensing gun includes: a body, a filter device, and at least two needle valves. The body has a filter chamber inside, and the filter device is installed inside the filter chamber. The side of the body near the filter chamber has a first glue inlet for feeding material. The first glue inlet is connected to the filter chamber for filtering the raw material. The two needle valves are installed on the side away from the filter chamber. At least two flow channels are opened at the bottom of the filter chamber. One end of the two flow channels is connected to the filter chamber, and the other end of the two flow channels is connected to the input end of the two needle valves for transmitting the filtered raw material. The raw material is output through the output end of the needle valves for dispensing.

[0006] As a further embodiment of this utility model: the filtration device includes a sleeve, a filter screen, and two sealing rings. The sleeve has a hollow interior, and the two sealing rings are respectively fitted onto both ends of the sleeve. Several first guide holes are opened on the outer surface of the sleeve. The filter screen is wrapped around the outer surface of the sleeve. A second guide hole is provided at the bottom of the sleeve, and the second guide hole is connected to the diversion channel. When the sleeve is inserted into the filter cavity, the two sealing rings abut against the inner wall of the filter cavity to form a filtration space. The first glue inlet hole is connected to the filtration space for feeding. The raw material flows through the filter screen and then through the first guide holes to the interior of the sleeve. The raw material inside the sleeve flows through the second guide hole to the diversion channel, thereby completing the filtration and conveying.

[0007] As a further embodiment of this utility model, it also includes a first heating structure, which includes a first heating tube, a second heating tube, and a first blind hole and a second blind hole opened on one side of the body. The first blind hole is adjacent to and intersects with the flow channel, and the second blind hole is adjacent to and intersects with the filter cavity. The first heating tube is inserted into the first blind hole to heat the raw material in the flow channel, and the second heating tube is inserted into the second blind hole to heat the raw material in the filter cavity.

[0008] As a further embodiment of this utility model: the main body is provided with at least two first blind holes, which can be located above or below the diversion channel. The main body is provided with two first heating tubes, which are respectively inserted into the two first blind holes.

[0009] As a further embodiment of this utility model: the main body is provided with at least one second blind hole, which can be located in front of or behind the filter cavity, and the main body is provided with a second heating tube, which is inserted into the second blind hole.

[0010] As a further embodiment of this utility model: the main body is also provided with a valve air inlet device, and at least two sets of air inlets are opened on the top of the main body. The air inlets are respectively connected to the valve air inlet device. At least two sets of air outlets are opened on the side of the main body where the needle valve is installed. The two air inlets are connected to the two air outlets to form a pipeline for conveying gas. The two air outlets are respectively connected to the two needle valves.

[0011] As a further embodiment of this utility model: the valve air intake device includes a solenoid valve and at least two air intake pipes. The output end of the solenoid valve is connected to one end of the two air intake pipes, and the other end of the two air intake pipes is connected to two air intake holes respectively. The top of the solenoid valve is provided with an input end. After the air enters the input end of the solenoid valve, it flows from the output end to the air intake pipe, and then flows from the air intake pipe into the needle valve.

[0012] As a further embodiment of this utility model, the main body is also provided with a power supply structure, which includes a power inlet, a power cord, and a power plug on the top of the main body. One end of the power cord is inserted into the power inlet, and the other end of the power cord is connected to the power plug.

[0013] As a further embodiment of this utility model: the main body is provided with a second glue inlet hole, which is located on the side of the main body adjacent to the first glue inlet hole. The second glue inlet hole is connected to the filter chamber for conveying the raw material to the filter chamber for filtration.

[0014] As a further embodiment of this utility model: the bottom of the main body is provided with a second heating structure for heating the output end of the needle valve. The second heating structure includes a transmission groove and a base plate opened on the bottom surface of the main body. An air inlet is opened on one side of the main body and the air inlet is connected to the transmission groove. An air outlet is opened on the side of the main body where the needle valve is located and the air outlet is connected to the transmission groove. The base plate is detachably installed on the bottom surface of the main body. The base plate abuts against the transmission groove to form a hot air pipe. Hot air enters the hot air pipe from the air inlet and flows out from the air outlet to heat the output end of the needle valve.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: by installing two needle valves, without changing the volume and weight, it achieves double the spraying and dispensing action or a single needle valve performs different spraying and dispensing effects, saving time and reducing the weight of the glue gun. When spraying and dispensing glue to the product, two different spraying and dispensing effects can be achieved, with at most two spraying and dispensing paths. This ensures that different spraying and dispensing amounts are achieved on the product or that double the amount of spraying and dispensing is sufficient to meet the next bonding process, thus ensuring the quality of spraying and dispensing.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] 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, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is an exploded view of the spraying glue gun in this utility model.

[0019] Figure 2 This is an exploded view of the main body, the first heating tube, and the second heating tube in this utility model.

[0020] Figure 3 This is a schematic diagram of another structure of the spraying glue gun in this utility model.

[0021] Figure 4 This is a top view of the main body and the filter device in this utility model.

[0022] Figure 5 yes Figure 3 The sectional view shown in AA.

[0023] Figure 6 This is a top view of the main body of this utility model.

[0024] Figure 7 yes Figure 5 The sectional view shown in BB.

[0025] Figure 8 This is a schematic diagram of the filter device in this utility model.

[0026] Figure 9 This is an exploded view of the filtration device in this utility model.

[0027] Figure 10 This is a partial cross-sectional view of the filter device and the main body of this utility model.

[0028] Figure 11 This is an exploded view of the body and base plate in this utility model.

[0029] Figure 12 This is a side view of the body and needle valve in this utility model.

[0030] Figure 13 yes Figure 12 A cross-sectional view of the CC section.

[0031] In the diagram: 1. Main body; 11. Filter chamber; 12. First glue inlet; 13. Diversion channel; 14. Air inlet; 15. Air outlet; 16. Power connection port; 2. Filter device; 21. Sleeve; 211. First guide hole; 212. Second guide hole; 22. Filter screen; 23. Sealing ring; 3. Needle valve; 4. First heating structure; 41. First heating tube; 42. Second heating tube; 43. First blind hole; 44. Second blind hole; 5. Valve air inlet device; 51. Solenoid valve; 52. Air inlet pipe; 6. Power supply structure; 61. Power cord; 62. Power plug; 17. Second glue inlet; 171. Sealing plug; 71. Transfer groove; 72. Base plate; 18. Air inlet; 19. Air outlet. Detailed Implementation

[0032] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0033] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0036] The embodiments of this application disclose a spraying glue gun, including a body 1, a needle valve 3 installed on the front side of the body 1, and a filter device 2 disposed inside the body 1. The glue material for dispensing flows from the first glue inlet 12 on the rear side of the body 1 through the filter device 2 for filtration. A diversion channel 13 is opened in the body 1 for conveying the filtered glue material. One end of the diversion channel 13 is connected to the filter output end of the filter device 2, and the other end of the diversion channel 13 is connected to the needle valve 3. The filtered glue material is conveyed to the needle valve 3 through the diversion channel 13.

[0037] The main body 1 is also equipped with a valve air inlet device 5 for controlling the dispensing of glue from the needle valve 3. The valve air inlet device 5 uses a solenoid valve 51 and an air inlet pipe 52. At least two air inlets 14 are opened on the top of the main body 1. The air inlets 14 extend toward the needle valve 3 and communicate with the needle valve 3. The solenoid valve 51 has an input end and an output end. One end of the air inlet pipe 52 is connected to the output end of the solenoid valve 51. The other end of the air inlet pipe 52 is inserted into the air inlet 14. Air enters through the input end of the solenoid valve 51. After the gas flow is controlled by the solenoid valve 51, the air is transmitted to the needle valve 3 from the output end.

[0038] The main body 1 is also provided with a first heating structure 4 for heating the dispensing material at the filter device 2 and the distribution channel 13. The first heating structure 4 is adjacent to the pipeline of the main body 1 used to transport the dispensing material. The main body 1 is also provided with a power supply structure 6. The power supply structure 6 includes a power cord 61 inserted into the top of the main body 1 and a power plug 62 connected to one end of the power cord 61. The power cord 61 is electrically connected to the heating component in the first heating structure 4 for power supply.

[0039] Please see Figures 1-7 In this embodiment of the present invention, the spray dispensing gun includes: a body 1 and at least two needle valves 3. A filter chamber 11 is provided inside the body 1, and a filter device 2 is provided inside the filter chamber 11. A first glue inlet hole 12 for feeding material is provided on the rear side of the body 1. The first glue inlet hole 12 is connected to the filter chamber 11 to transport the raw material to the filter device 2 for filtration. The two needle valves 3 are installed on the front side of the body 1. At least two diversion channels 13 are provided at the bottom of the filter chamber 11. One end of the two diversion channels 13 is connected to the filter chamber 11, and the other end of the two diversion channels 13 is connected to the input end of the two needle valves 3 respectively, so that the filtered raw material can flow through the needle valves 3. The raw material is output through the needle valves 3 to achieve the dispensing effect.

[0040] Specifically, the connection between the filter device 2 and the filter chamber 11 includes, but is not limited to, insertion and threaded connection. The needle valve 3 can be a conventionally designed product; for example, a mini needle valve 3, such as the Fisnar MV-0180LF miniature needle dispensing valve, can be used. Alternatively, the needle valve 3 can be a single-liquid dispensing valve for dispensing machines, model JQ-19TG. The needle valve 3 has an input end and an output end. The specific structure of the needle valve 3 can be found in ZL201220022088.3 or ZL01229265.6, and will not be elaborated further in this invention.

[0041] Further as Figures 8-9 As shown in the embodiment of this utility model, the filter device 2 includes a sleeve 21, a filter screen 22, and two sealing rings 23. The sleeve 21 has a hollow interior, and the two sealing rings 23 are respectively sleeved on both ends of the sleeve 21. Several first guide holes 211 are opened on the outer surface of the sleeve 21. The filter screen 22 is wrapped around the outer surface of the sleeve 21. The bottom of the sleeve 21 has a second guide hole 212, which is connected to the diversion channel 13. When the sleeve 21 is inserted into the filter cavity 11, the two sealing rings 23 abut against the inner wall of the filter cavity 11, so that the area between the two sealing rings 23 serves as the filter space. The first glue inlet 12 is connected to the filter space for feeding. The raw material flows into the filter space from the glue inlet. After being filtered by the filter screen 22, the raw material flows from the filter screen 22 to the first guide hole 211. The raw material then flows through the first guide hole 211 to the interior of the sleeve 21. The raw material inside the sleeve 21 flows through the second guide hole 212 to the diversion channel 13, thereby completing the filtration and conveying. Specifically, such as Figure 9As shown, when the two sealing rings 23 are fitted onto the sleeve 21, the edges of the sealing rings 23 abut against the cavity wall of the filter chamber 11. The sealing rings 23 at both ends, the filter screen 22 and the cavity wall of the filter chamber 11 form an annular sealed filtration space. The raw material can enter the sleeve 21 from all sides of the filter screen 22, which has high glue feeding efficiency and can prevent leakage when flowing from the first glue inlet hole 12 into the filtration space.

[0042] Further as Figures 1-5 As shown, in the embodiments of this utility model, the valve air inlet device 5 can adopt the following scheme: at least two sets of air inlets 14 are provided on the top of the body 1, and at least two sets of air outlets 15 are provided on the side of the body 1 where the needle valve 3 is installed. The two air inlets 14 are connected to the two air outlets 15 to form a pipeline for conveying gas. The two air outlets 15 are respectively connected to the two needle valves 3. An air inlet pipe 52 is provided between the solenoid valve 51 and the air inlet 14. The output end of the solenoid valve 51 is connected to one end of the two air inlet pipes 52, and the other end of the two air inlet pipes 52 is respectively connected to the two air inlets 14. The top of the solenoid valve 51 is provided with an input end. After the air enters the input end of the solenoid valve 51, it flows from the output end of the solenoid valve 51 to the air inlet pipe 52, and then flows into the needle valve 3 from the air inlet pipe 52. After the air is pressurized by the solenoid valve 51, it is transmitted to the needle valve 3. The flow rate of the transmitted gas is controlled by the solenoid valve 51 to control the dispensing of glue from the needle valve 3. Specifically, the connection between the solenoid valve 51 and the intake pipe 52 includes, but is not limited to, threaded connection.

[0043] Further as Figures 1-3 and Figures 6-7 As shown, in an embodiment of this utility model, the first heating structure 4 includes a first heating tube 41, a second heating tube 42, and a blind hole on the right side of the main body 1. The blind hole is divided into a first blind hole 43 and a second blind hole 44. The first blind hole 43 is adjacent to and intersects with the flow channel 13, and the second blind hole 44 is adjacent to and intersects with the filter cavity 11. The first heating tube 41 is inserted into the first blind hole 43 to heat the raw material in the flow channel 13, and the second heating tube 42 is inserted into the second blind hole 44 to heat the raw material in the filter cavity 11. Specifically, the first heating tube 41 and the second heating tube 42 can be single-ended heating tubes, such as the EH5220 heating tube from Guangdong Santian Electric Heating Products Co., Ltd. The first blind hole 43 and the flow channel 13 are arranged in an interlaced manner, and the first blind hole 43 and the flow channel 13 are arranged perpendicularly to each other.

[0044] In another embodiment of this utility model, the layout of the first blind hole 43 and the first heating tube 41 can be as follows: the body 1 is provided with two first blind holes 43, which can be located above or below the distribution channel 13. The body 1 is provided with two first heating tubes 41, which are respectively inserted into the two first blind holes 43. The two first heating tubes 41 are installed in the two first blind holes 43 by insertion. The first blind holes 43 can be evenly spaced at a certain distance at the distribution channel 13, for example, the first blind hole 43 and the distribution channel 13 are spaced 3mm or 5mm apart, so that the first heating tube 41 can heat the raw material in the distribution channel 13 and prevent the raw material heating temperature in the distribution channel 13 from being uneven, which would affect the dispensing effect.

[0045] like Figures 6-7 As shown, in another embodiment of this utility model, the layout of the first blind hole 43 and the first heating tube 41 can also adopt the following scheme: three first blind holes 43 are provided in the body 1, and three first heating tubes 41 are installed in the body 1 respectively, which can heat the flow channel 13 and help ensure the dispensing quality.

[0046] Further as Figures 6-7 As shown, in the embodiment of this utility model, the layout of the second blind hole 44 in the first heating structure 4 can adopt the following scheme: the body 1 is provided with at least one second blind hole 44, the second blind hole 44 can be arranged adjacently in front of and behind the filter cavity 11, and the body 1 correspondingly inserts a second heating tube 42 into the second blind hole 44, thereby heating the filter cavity 11 through the second heating tube 42. Specifically, the second heating tube 42 and the filter cavity 11 are arranged perpendicularly to each other, that is, the second blind hole 44 extends from the right side of the body 1 to the left side of the body 1, and the first glue inlet hole 12, the filter cavity 11 and the diversion channel 13 are used for material transmission in the front-back direction of the body 1. This layout facilitates assembly by the staff in the actual production process. On the other hand, the process of the material used for dispensing is transmitted from the first glue inlet hole 12 to the filter cavity 11, and then through the diversion channel 13 to the needle valve 3. The direction of transmission can be understood as from the rear side of the body 1 to the needle valve 3 at the front side of the body 1. During the material transmission process, the first heating tube 41 and the second heating tube 42 can heat the filter cavity 11 and the diversion channel 13 respectively, ensuring that the material used for dispensing is heated evenly.

[0047] Further as Figures 1-3 As shown, in an embodiment of this utility model, the power supply structure 6 includes a power inlet 16, a power cord 61, and a power plug 62 located on the top of the main body 1. One end of the power cord 61 is inserted into the power inlet 16, and the other end of the power cord 61 is connected to the power plug 62. Specifically, the power supply structure 6 can be used to supply power to the first heating structure.

[0048] Further as Figures 1-2As shown, in an embodiment of this utility model, the main body 1 has a second glue inlet hole 17, which is located on the side of the main body 1 adjacent to the first glue inlet hole 12. The second glue inlet hole 17 is connected to the filter chamber 11 for conveying raw materials to the filter chamber 11 for filtration. Specifically, a sealing plug 171 is provided at the second glue inlet hole 17. The sealing plug 171 is inserted into the second glue inlet hole 17. When the spray gun is installed on the robot arm, if the first glue inlet hole 12 interferes and prevents material from being fed, the sealing plug 171 can be removed and installed in the first glue inlet hole 12, and material can be fed through the second glue inlet hole 17.

[0049] Further as Figure 2 and Figures 11-13 As shown in the embodiment of this utility model, the bottom of the main body 1 is provided with a second heating structure for heating the output end of the needle valve 3. The second heating structure includes a transmission groove 71 and a base plate 72 formed on the bottom surface of the main body 1. An air inlet 18 is formed on one side of the main body 1, which is connected to the transmission groove 71. An air outlet 19 is formed on the side of the main body 1 where the needle valve 3 is located, which is connected to the transmission groove 71. The base plate 72 is detachably installed on the bottom surface of the main body 1. The base plate 72 abuts against the transmission groove 71 to form a hot air duct. Hot air enters the hot air duct from the air inlet 18 and flows out from the air outlet 19 to heat the output end of the needle valve 3. Specifically, the connection method between the base plate 72 and the main body 1 includes, but is not limited to, threaded connection and snap-fit ​​connection.

[0050] The working principle of this utility model is as follows: the raw material for glue injection enters the filtration space through the glue inlet. After being filtered by the filter device 2, the raw material is transmitted to each distribution channel 13 through the second guide hole 212 at the bottom of the sleeve 21. The filtered raw material is then transported from the distribution channel 13 to each needle valve 3. The pipelines inside the body 1 are heated by the first heating structure 4, which helps to reduce the viscosity of the glue and improve its fluidity. At the same time, by installing two needle valves 3, double the glue spraying action can be achieved without changing the volume and weight, thus saving time.

[0051] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A spray glue gun, characterized in that, include: The body (1), filter device (2) and at least two needle valves (3) are provided. The filter chamber (11) is opened inside the body (1). The filter device (2) is installed in the filter chamber (11). The body (1) has a first glue inlet hole (12) for feeding material on the side near the filter chamber (11). The first glue inlet hole (12) is connected to the filter chamber (11) for filtering the raw material. The two needle valves (3) are installed on the side away from the filter chamber (11) of the body (1). At least two diversion channels (13) are opened at the bottom of the filter chamber (11). One end of the two diversion channels (13) is connected to the filter chamber (11). The other end of the two diversion channels (13) is connected to the input end of the two needle valves (3) respectively for transmitting the filtered raw material. The raw material is output through the output end of the needle valve (3) for dispensing.

2. The spraying and dispensing gun according to claim 1, characterized in that, The filter device (2) includes a sleeve (21), a filter screen (22), and two sealing rings (23). The sleeve (21) has a hollow interior. The two sealing rings (23) are respectively fitted onto the two ends of the sleeve (21). The outer surface of the sleeve (21) has several first guide holes (211). The filter screen (22) is wrapped around the outer surface of the sleeve (21). The bottom of the sleeve (21) has a second guide hole (212) that connects to the filter screen. Diversion channel (13); When the sleeve (21) is inserted into the filter cavity (11), the two sealing rings (23) abut against the inner wall of the filter cavity (11) to form a filtration space. The first glue inlet hole (12) is connected to the filtration space for feeding. The raw material flows through the filter screen (22) and then through the first guide hole (211) to the inside of the sleeve (21). The raw material inside the sleeve (21) flows through the second guide hole (212) to the diversion channel (13) to complete the filtration and conveying.

3. The spraying and dispensing gun according to claim 1, characterized in that, It also includes a first heating structure (4), which includes a first heating tube (41), a second heating tube (42), and a first blind hole (43) and a second blind hole (44) opened on one side of the body (1). The first blind hole (43) is adjacent to the flow channel (13) and intersects with the flow channel (13). The second blind hole (44) is adjacent to the filter cavity (11) and intersects with the filter cavity (11). The first heating tube (41) is inserted in the first blind hole (43) to heat the raw material in the flow channel (13), and the second heating tube (42) is inserted in the second blind hole (44) to heat the raw material in the filter cavity (11).

4. The spraying and dispensing gun according to claim 3, characterized in that, The main body (1) has at least two first blind holes (43), which can be located above or below the diversion channel (13). The main body (1) is provided with two first heating tubes (41), which are respectively inserted into the two first blind holes (43).

5. The spraying and dispensing gun according to claim 3, characterized in that, The main body (1) has at least one second blind hole (44), which can be located in front of and behind the filter cavity (11). The main body (1) is provided with a second heating tube (42), which is inserted into the second blind hole (44).

6. The spraying and dispensing gun according to claim 1, characterized in that, The main body (1) is also provided with a valve air inlet device (5). At least two sets of air inlets (14) are opened on the top of the main body (1). The air inlets (14) are respectively connected to the valve air inlet device (5). At least two sets of air outlets (15) are opened on the side of the main body (1) where the needle valve (3) is installed. The two air inlets (14) are connected to the two air outlets (15) to form a pipeline for conveying gas. The two air outlets (15) are respectively connected to the two needle valves (3).

7. The spraying and dispensing gun according to claim 6, characterized in that, The valve air intake device (5) includes a solenoid valve (51) and at least two air intake pipes (52). The output end of the solenoid valve (51) is connected to one end of the two air intake pipes (52), and the other end of the two air intake pipes (52) is connected to two air intake holes (14) respectively. The top of the solenoid valve (51) is provided with an input end. After the air enters the input end of the solenoid valve (51), it flows from the output end to the air intake pipe (52) and then flows from the air intake pipe (52) into the needle valve (3).

8. The spraying and dispensing gun according to claim 1, characterized in that, The main body (1) is also provided with a power supply structure (6), which includes a power inlet (16) on the top of the main body (1), a power cord (61) and a power plug (62). One end of the power cord (61) is inserted into the power inlet (16), and the other end of the power cord (61) is connected to the power plug (62).

9. The spraying and dispensing gun according to claim 1, characterized in that, The main body (1) has a second glue inlet hole (17), which is located on the side of the main body (1) adjacent to the first glue inlet hole (12). The second glue inlet hole (17) is connected to the filter chamber (11) for conveying raw materials to the filter chamber (11) for filtration.

10. The spraying and dispensing gun according to claim 1, characterized in that, The bottom of the main body (1) is provided with a second heating structure for heating the output end of the needle valve (3). The second heating structure includes a transmission groove (71) and a base plate (72) on the bottom surface of the main body (1). An air inlet (18) is provided on one side of the main body (1), and the air inlet (18) is connected to the transmission groove (71). An air outlet (19) is provided on the side of the main body (1) where the needle valve (3) is located, and the air outlet (19) is connected to the transmission groove (71). The base plate (72) is detachably installed on the bottom surface of the main body (1). The base plate (72) abuts against the transmission groove (71) to form a hot air duct. Hot air enters the hot air duct from the air inlet (18) and flows out from the air outlet (19) to heat the output end of the needle valve (3).

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