A glue gun

Abstract

The utility model discloses a glue spraying gun belongs to glue spraying device field. Include: glue spraying gun main part, glue spraying head, glue gas adapter seat, valve body, the bottom wall of glue spraying gun main part has first inclination, and the lower extreme of first inclination is close to glue gas adapter seat. Compared with prior art, the bottom of glue spraying gun main part is set to the inclination structure, and the certain interval is formed between with base material, can reduce the probability of glue silk rebound back to glue gun main part to can avoid the pollution to the bottom of gun body, also can avoid the glue silk of gun body bottom adhesion drop into the base material below, improves the yield of product.

Description

Technical Field

[0001] This utility model belongs to the field of glue spraying devices, and specifically relates to a glue spraying gun. Background Technology

[0002] Hot melt adhesive spraying is a process that involves applying molten adhesive to a substrate material for bonding and laminating other materials. It has wide applications in industries such as nonwovens, papermaking, household paper, baby and women's products, automobiles, packaging, and hygiene products. Hot melt adhesive spray guns based on this process are well-known. A typical hot melt adhesive spray gun consists of a gun body and a spray head. An adhesive-air adapter is usually installed between the gun body and the spray head, and a valve is mounted on the adapter to control the flow of adhesive. During operation, hot melt adhesive is forced into the gun body by pressure, then passes through the adhesive-air adapter into the spray head, and finally is applied to the relevant material through the nozzle.

[0003] To facilitate the discharge of adhesive, existing glue guns typically introduce high-pressure atomizing gas. The atomizing gas and adhesive enter the nozzle together and are then sprayed outwards. This process disperses the adhesive into small particles, making it easier to evenly coat the material. At the same time, the atomizing gas can also blow the adhesive into an S-shape or spiral shape to meet the spraying needs of different scenarios.

[0004] Then, in existing glue spray guns, the bottom of the gun body is usually horizontal and the distance between it and the substrate material is relatively close. When the glue spray head sprays glue, the glue strands on the material are easy to bounce back to the gun body and adhere to the gun body, which will cause contamination to the gun body. At the same time, the glue strands attached to the bottom of the gun body are also easy to fall into the substrate material below after accumulating, which will affect the yield of the product. Utility Model Content

[0005] To address the aforementioned problems, the present invention aims to provide a glue spray gun that, by setting the bottom of the glue spray gun body to a sloping structure and creating a certain gap between it and the base material, reduces the probability of glue strands rebounding back to the glue gun body, thereby preventing contamination of the bottom of the gun body.

[0006] Another objective of this invention is to provide a glue spray gun that prevents the glue strands attached to the bottom of the gun from falling onto the substrate material below, thereby improving the product yield.

[0007] To achieve the above objectives, the technical solution of this utility model is as follows:

[0008] This utility model provides a glue spray gun, comprising:

[0009] The glue gun body has an adhesive inlet and an air inlet on its outer side wall, and an adhesive delivery channel and a gas delivery channel are opened inside. The adhesive inlet is connected to the adhesive delivery channel, and the air inlet is connected to the gas delivery channel.

[0010] A glue spray head, the glue spray head having a glue spraying channel, a glue spraying nozzle, a jet spraying channel and an atomizing gas nozzle, the glue spraying nozzle being located at the outlet of the glue spraying channel and the atomizing gas nozzle being located at the outlet of the jet spraying channel;

[0011] An adhesive-gas adapter has an adhesive transfer path for introducing liquid adhesive into a spray nozzle and an air transfer path for introducing atomizing gas into an air inlet. The liquid adhesive delivery channel is connected to the inlet of the spray nozzle channel via the adhesive transfer path, and the gas delivery channel is connected to the inlet of the spray nozzle channel via the air transfer path.

[0012] Valve body, the valve body being used to control the on / off state of the adapter rubber circuit;

[0013] The bottom wall of the glue gun body has a first inclined surface, and the lower end of the first inclined surface is close to the glue-air adapter.

[0014] Furthermore, the bottom of the adhesive adapter has a second inclined surface, the lower end of the first inclined surface is adjacent to the upper end of the second inclined surface, and the lower end of the second inclined surface is close to the adhesive spray head.

[0015] Furthermore, the angles between the first and second inclined planes and the horizontal plane are between 20° and 45°.

[0016] Furthermore, the gas delivery channel includes a first gas passage, a second gas passage, a third gas passage, and a fourth gas passage. The inlet of the first gas passage is connected to an air inlet, the outlet of the first gas passage is connected to the inlet of the second gas passage, the outlet of the second gas passage is connected to the inlet of the third gas passage, the outlet of the third gas passage is connected to the inlet of the fourth gas passage, and the outlet of the fourth gas passage is connected to the inlet of a transfer gas path. A spiral heater is installed inside the second gas passage.

[0017] Furthermore, the spiral heater includes a heating inner core and a heat-conducting sleeve, the heat-conducting sleeve being fitted over the heating inner core, and a spiral groove being formed on the outer wall of the heat-conducting sleeve.

[0018] Furthermore, multiple adhesive delivery channels and gas delivery channels are provided, and these multiple adhesive delivery channels and gas delivery channels are arranged longitudinally in sequence within the body of the glue gun. A horizontally arranged heating rod is also installed within the body of the glue gun.

[0019] Furthermore, the heating rod is located near the third and fourth air passages. This allows for secondary heating of the atomized gas, ensuring its temperature is maintained.

[0020] The beneficial effects of this utility model are as follows: Compared with the prior art, by setting the bottom of the glue gun body to a sloping structure and forming a certain gap between it and the base material, the probability of glue strands rebounding back to the glue gun body can be reduced, thereby avoiding contamination of the bottom of the gun body; at the same time, it can also prevent glue strands attached to the bottom of the gun body from falling into the base material below, thus improving the product yield. Attached Figure Description

[0021] Figure 1 This is an isometric view of a glue spray gun.

[0022] Figure 2 This is an exploded view of a glue gun.

[0023] Figure 3 This is the front view of the glue spray gun.

[0024] Figure 4 yes Figure 3 Cross-sectional view at point AA.

[0025] Figure 5 yes Figure 3 Cross-sectional view at point BB.

[0026] Figure 6 yes Figure 3 Cross-sectional view at point CC.

[0027] Figure 7 yes Figure 3 Cross-sectional view at point DD.

[0028] Figure 8 It is a cross-sectional view of the glue spray head and glue-air adapter in their assembled state.

[0029] Figure 9 This is a schematic diagram of the adhesive spray nozzle.

[0030] Figure 10 This is a schematic diagram of a spiral heater.

[0031] In the diagram: 1. Main body of the glue spray gun; 11. Glue inlet; 12. Air inlet; 13. Glue delivery channel; 14. Gas delivery channel; 141. First air passage; 142. Second air passage; 143. Third air passage; 144. Fourth air passage; 15. Glue filter tank; 16. Glue filter; 17. First inclined surface; 2. Glue spray head; 21. Glue spray channel; 22. Glue spray nozzle; 23. Air spray channel; 24. Atomizing air nozzle; 3. Glue-air adapter; 31. Glue transfer path; 32. Air transfer path; 33. Valve body docking groove; 34. Second inclined surface; 4. Valve body; 5. Pneumatic solenoid valve; 6. Spiral heater; 61. Heating core; 62. Heat-conducting sleeve; 63. Spiral groove; 7. Heating rod. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0033] To achieve the above objectives, the technical solution of this utility model is as follows:

[0034] See Figure 1-10 As shown, this embodiment provides a glue spray gun, including:

[0035] The glue gun body 1 has an adhesive inlet 11 and an air inlet 12 on its outer side wall. Inside, there is an adhesive liquid delivery channel 13 for delivering hot melt adhesive and a gas delivery channel 14 for delivering atomized gas. The adhesive inlet 11 is connected to the adhesive liquid delivery channel 13, and the air inlet 12 is connected to the gas delivery channel 14.

[0036] The glue spray head 2 has a glue spraying channel 21 for conveying glue liquid, a glue spraying nozzle 22 for spraying glue liquid onto materials, a jet spraying channel 23 for conveying atomized gas, and an atomized gas nozzle 24 for spraying atomized gas. The glue spraying nozzle 22 is located at the outlet of the glue spraying channel 21, and the atomized gas nozzle 24 is located at the outlet of the jet spraying channel 23.

[0037] The adhesive-gas adapter 3 has an adhesive transfer path 31 for introducing liquid adhesive into the spray nozzle 2 and an air transfer path 32 for introducing atomized gas into the air inlet 12. The liquid adhesive delivery channel 13 is connected to the inlet of the spray channel 21 through the adhesive transfer path 31, and the gas delivery channel 14 is connected to the inlet of the spray channel 23 through the air transfer path 32.

[0038] Valve body 4, which is used to control the opening and closing of the adapter rubber circuit 31.

[0039] The working principle of the glue spray gun in this application is as follows: external hot melt adhesive enters the glue spray gun body 1 through the glue inlet 11, then enters the glue transfer path 31 of the glue-air adapter 3 through the glue delivery channel 13, then enters the glue spraying channel 21 of the spray head 2 through the glue transfer path 31, and finally is sprayed onto the material to be coated with adhesive through the glue nozzle 22; external compressed gas enters the glue spray gun body 1 through the air inlet 12, then enters the glue-air adapter 32 of the glue-air adapter 3 through the gas delivery channel 14, and then enters the air jet channel 23 of the spray head 2 through the air transfer path 32. Finally, the glue is sprayed out from the atomizing nozzle 24, blowing the glue sprayed from the glue spray nozzle 22 into small particles, so that the glue is evenly coated on the material. A pneumatic solenoid valve 5 is installed on the valve body 4. The pneumatic solenoid valve 5 controls the external air source to enter the valve body 4 from different inlets, pushing the valve rod up and down to realize the opening or blocking of the glue transfer path 31. When the glue transfer path 31 is open, the glue can smoothly enter the glue spray head 2 for spraying. When the glue transfer path 31 is blocked, the glue cannot enter the glue spray head 2, thus realizing the control of the glue spraying gun.

[0040] Furthermore, the top of the adhesive transfer seat 3 is provided with a valve body docking groove 33. The transfer adhesive path 31 passes through the valve body docking groove 33, and the lower part of the valve body 4 is installed in the valve body docking groove 33, so that the transfer adhesive path 31 can be opened or closed by the movement of the valve stem. With the above structure, the opening or closing of the transfer adhesive path 31 can be controlled by the valve body 4. When it is open, the adhesive can enter the spray head 2 for dispensing; when it is closed, the transfer adhesive path 31 is disconnected, and the spray head 2 stops dispensing adhesive.

[0041] Furthermore, the glue gun body 1 is also provided with a glue filter tank 15, and a glue filter 16 is installed in the glue filter tank 15. The glue filter 16 is located on the path of the glue delivery channel 13. After the glue enters the glue delivery channel 13 from the glue inlet 11, it is filtered by the glue filter 16 and then enters the glue nozzle 2 from the glue air adapter 3 for glue dispensing.

[0042] Furthermore, the gas delivery channel 14 includes a first gas channel 141, a second gas channel 142, a third gas channel 143, and a fourth gas channel 144. The inlet of the first gas channel 141 is connected to the air inlet 12, the outlet of the first gas channel 141 is connected to the inlet of the second gas channel 142, the outlet of the second gas channel 142 is connected to the inlet of the third gas channel 143, the outlet of the third gas channel 143 is connected to the inlet of the fourth gas channel 144, and the outlet of the fourth gas channel 144 is connected to the inlet of the transfer gas path 31. A spiral heater 6 is provided inside the second gas channel 142.

[0043] Furthermore, the spiral heater 6 includes a heating inner core 61 and a heat-conducting sleeve 62. The heat-conducting sleeve 62 is sleeved on the heating inner core 61, and a spiral groove 63 is formed on the outer wall of the heat-conducting sleeve 62.

[0044] In this application, when compressed gas enters the second air passage 142 from the air inlet 12 and the first air passage 141, it can be heated by the spiral heater 6 to form a spiral atomized gas. The spiral heater 6 can extend the heating path of the compressed gas and increase the heating time of the compressed gas, thereby ensuring that the temperature of the atomized gas is more stable and closer to the temperature of the glue, which can improve the atomization efficiency and make the glue molding effect better.

[0045] Furthermore, multiple adhesive delivery channels 13 and gas delivery channels 14 are provided, arranged longitudinally in sequence within the glue gun body 1. A horizontally arranged heating rod 7 is also installed within the glue gun body 1. In this application, the horizontal arrangement of the heating rod 7 allows for effective heat exchange with the multiple adhesive delivery channels 13 and gas delivery channels 14, preventing adhesive solidification and providing auxiliary heating for the atomized gas.

[0046] Furthermore, the heating rod 7 is located near the third air passage 143 and the fourth air passage 144. This allows for secondary heating of the atomized gas, ensuring the temperature of the atomized gas.

[0047] Furthermore, the bottom wall of the glue gun body 1 has a first inclined surface 17, and the bottom of the glue-gas adapter 3 has a second inclined surface 34. The lower end of the first inclined surface 17 is adjacent to the upper end of the second inclined surface 34, and the lower end of the second inclined surface 34 is close to the lower end of the second side wall 33. Through the above structural design, the bottoms of both the glue gun body 1 and the glue-gas adapter 3 are inclined structures, with the end near the glue nozzle 2 being the lower end of the inclined structure. The bottoms of the glue gun body 1 and the glue-gas adapter 3 have a certain distance from the material below, reducing the probability of glue strands rebounding back to the glue gun body. Less glue adheres to the bottom of the glue gun body, also reducing the risk of glue accumulating and falling onto the product, thereby improving the product yield.

[0048] Furthermore, the angles between the first and second inclined planes and the horizontal plane are between 20° and 45°.

[0049] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A glue spray gun, characterized in that, include: The glue gun body has an adhesive inlet and an air inlet on its outer side wall, and an adhesive delivery channel and a gas delivery channel are opened inside. The adhesive inlet is connected to the adhesive delivery channel, and the air inlet is connected to the gas delivery channel. A glue spray head, the glue spray head having a glue spraying channel, a glue spraying nozzle, a jet spraying channel and an atomizing gas nozzle, the glue spraying nozzle being located at the outlet of the glue spraying channel and the atomizing gas nozzle being located at the outlet of the jet spraying channel; An adhesive-gas adapter has an adhesive transfer path for introducing liquid adhesive into a spray nozzle and an air transfer path for introducing atomizing gas into an air inlet. The liquid adhesive delivery channel is connected to the inlet of the spray nozzle channel via the adhesive transfer path, and the gas delivery channel is connected to the inlet of the spray nozzle channel via the air transfer path. Valve body, the valve body being used to control the on / off state of the adapter rubber circuit; The bottom wall of the glue gun body has a first inclined surface, and the lower end of the first inclined surface is close to the glue-air adapter.

2. The glue spray gun as described in claim 1, characterized in that, The bottom of the glue-air adapter has a second inclined surface, the lower end of the first inclined surface is adjacent to the upper end of the second inclined surface, and the lower end of the second inclined surface is close to the glue spray head.

3. A glue spray gun as described in claim 2, characterized in that, The angles between the first and second inclined planes and the horizontal plane are between 20° and 45°.

4. A glue spray gun as described in claim 1, characterized in that, The gas delivery channel includes a first gas channel, a second gas channel, a third gas channel, and a fourth gas channel. The inlet of the first gas channel is connected to the air inlet, the outlet of the first gas channel is connected to the inlet of the second gas channel, the outlet of the second gas channel is connected to the inlet of the third gas channel, the outlet of the third gas channel is connected to the inlet of the fourth gas channel, and the outlet of the fourth gas channel is connected to the inlet of the transfer gas path. A spiral heater is installed in the second gas channel.

5. A glue gun as described in claim 4, characterized in that, The spiral heater includes a heating inner core and a heat-conducting sleeve. The heat-conducting sleeve is fitted over the heating inner core, and a spiral groove is formed on the outer wall of the heat-conducting sleeve.

6. A glue spray gun as described in claim 4, characterized in that, Multiple adhesive delivery channels and gas delivery channels are provided, and these channels are arranged longitudinally in sequence within the body of the glue gun. A horizontally arranged heating rod is also installed inside the body of the glue gun.

7. A glue spray gun as described in claim 6, characterized in that, The heating rod is located near the third and fourth air passages.

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