Nozzle and spray gun

Abstract

The nozzle comprises a rectangular nozzle body, a first glue inlet and a glue spraying opening are formed in the rectangular nozzle body, a long-strip-shaped communicating body is further included, first glue outlets, communicating channels and second glue inlets are formed in the long-strip-shaped communicating body at equal intervals, the nozzle body is fixed to the communicating body, the first glue inlets are correspondingly connected with the first glue outlets, and a control valve for controlling on-off of glue liquid is arranged on the communicating body. The nozzle body and the communicating body are further provided with air inlet structures. The spray gun comprises a gun body and the nozzles, the multiple nozzles are arranged on the gun body in an end-to-end connection mode, the communicating channels of the adjacent communicating bodies are communicated, the communicating channels at the two ends are closed, and a glue inlet channel and an air inlet channel are formed in the gun body. According to the nozzle and the spray gun, the pressure of glue liquid is balanced through the communicating channel, the influence on the glue spraying quality is reduced, and the glue spraying uniformity is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of hot melt adhesive spray guns, and particularly relates to a nozzle and a spray gun. Background Art

[0002] In modern industrial production, the hot melt adhesive spraying process is widely used in fields such as material pasting and compounding due to its high efficiency and convenience. The core of this process is to evenly coat the hot melt adhesive on the substrate material through a spray gun to meet specific process requirements.

[0003] Generally, a single spray gun can only complete the glue spraying operation at one point or a small number of local points. When it is necessary to spray glue at multiple points in a row during production, it is necessary to arrange multiple spray guns in a row to meet the requirements. Although this solution solves the problem of the number of points to a certain extent, it has caused new technical problems.

[0004] Specifically, the glue feeding systems of different spray guns in the prior art are independent of each other. Although the operator tries to control the glue feeding pressure at the glue feeding source to make the glue feeding pressures of each spray gun consistent, in fact, after the glue is ejected through different spray guns, there will always be a phenomenon of inconsistent glue pressure. This fluctuation of the glue pressure will directly lead to problems such as uneven glue spraying amount and inconsistent glue layer thickness, seriously affecting the glue spraying quality, and further having an adverse impact on the subsequent material pasting and compounding effects. It may even lead to unqualified product quality, increasing production costs and production cycles.

[0005] The prior art relatively close to the present application: A high-speed hot melt adhesive spray gun is disclosed in the patent with the patent authorization announcement number CN 220861869 U; A hot melt adhesive fiber spray gun is disclosed in the patent with the patent authorization announcement number CN 219483238 U. Summary of the Invention

[0006] In view of the problems pointed out in the background art, the present invention provides a nozzle and a spray gun to solve the above technical problems.

[0007] The technical solution of the present invention is realized as follows: A nozzle includes a nozzle body, and a first glue inlet and a glue spraying port are provided on the nozzle body. It further includes a long strip-shaped connecting body, and a plurality of first glue outlet ports are arranged at intervals along the length direction of the connecting body. A connecting channel penetrating both sides along the length direction is provided inside the connecting body. A second glue inlet communicating with the connecting channel is provided on the connecting body. The nozzle body is fixedly connected to the connecting body, and the first glue inlet is correspondingly connected to the first glue outlet port.

[0008] The present invention is further configured to further include a control valve fixedly connected to the communicating body, and the second glue outlet of the control valve is connected to the second glue inlet.

[0009] The present invention is further configured that an air inlet one and an air jet outlet are provided on the nozzle body, and an air inlet channel one connected to the air inlet one is provided on the communicating body, and the number and position of the air inlet channel one are correspondingly arranged with the first glue outlet.

[0010] The present invention is further configured that a first fixing hole is provided on the communicating body.

[0011] The present invention is further configured that the second glue inlet is located at the middle position of the connecting channel.

[0012] The present invention is further configured that the diameter of the first glue outlet is smaller than the diameter of the connecting channel.

[0013] The present invention is further configured that internal threads are provided on the inner side wall of the air inlet channel one, a second fixing hole corresponding to the air inlet channel one is provided on the nozzle body, the second fixing hole passes through the air inlet one, and an air inlet bolt is connected inside the second fixing hole and the air inlet channel one, and a communicating air hole connecting the air inlet channel one and the air inlet one is provided on the air inlet bolt.

[0014] A spray gun includes a gun body and further includes the above-mentioned nozzle. An adhesive feeding channel communicating with the third adhesive inlet of the hole control valve is provided inside the gun body, an air inlet channel two communicating with the air inlet channel one is provided inside the gun body, a plurality of nozzles are arranged along the length direction of the gun body in a head-to-tail connection, the connecting channels of adjacent communicating bodies are communicated, and one end of the connecting channels at both ends in the length direction of the gun body communicating with the outside is closed.

[0015] A spray gun includes a gun body and further includes the above-mentioned nozzle. An adhesive feeding channel communicating with the third adhesive inlet of the hole control valve is provided inside the gun body, an air inlet channel two communicating with the air inlet channel one is provided inside the gun body, a plurality of nozzles are arranged along the length direction of the gun body in a head-to-tail connection; a plurality of gun bodies are provided and are connected in a head-to-tail connection, and one end of the connecting channels on the gun bodies at both ends communicating with the outside is closed.

[0016] Adopting the above technical solutions, the beneficial effects of the present invention are as follows: For the nozzle and the spray gun provided by the present invention, when a plurality of nozzles and spray guns are arranged in a head-to-tail connection, adjacent nozzles and spray guns can be interconnected through the connecting channels on the communicating body to form a glue supply channel connecting all the spray guns. The glue in the spray gun first enters the connecting channel and then enters the nozzle. In this way, even if there is a pressure difference between the glue supplied by different spray guns, it can converge and reach pressure balance after entering the connecting channel, so as to minimize the adverse impact on the glue spraying quality caused by the glue pressure difference as much as possible. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of the nozzle of the present invention.

[0019] Figure 2 It is a schematic structure of the connecting body of the present invention Figure 1 。

[0020] Figure 3 It is a cross-sectional view of the connecting body of the present invention.

[0021] Figure 4 It is a schematic structure of the connecting body of the present invention Figure 2 。

[0022] Figure 5 It is a schematic structural diagram of the connection of two spray guns of the present invention.

[0023] Figure 6 It is a schematic structural diagram of the connection between the spray gun and the nozzle of the present invention.

[0024] Figure 7 It is a schematic structural diagram of the air inlet bolt of the present invention.

[0025] Figure 8 It is a schematic structural diagram of the head-to-tail connection of three connecting bodies of the present invention.

[0026] Figure 9 It is an exploded view of the nozzle body of the present invention.

[0027] Explanation of the reference numerals in the drawings: nozzle body 1, first glue inlet 2, connecting body 3, first glue outlet 4, connecting channel 5, second glue inlet 6, control valve 7, second glue outlet 8, first air inlet 9, first air inlet channel 10, first fixing hole 11, second fixing hole 12, air inlet bolt 13, connecting air hole 14, gun body 15, third glue inlet 16, glue inlet channel 17, second air inlet channel 18, glue inlet joint 19, air inlet joint 20, first outer clip 27, wide film 26, glue filter film 25, glue inlet film 23, first jet film 22, jet film 21, second jet film 31, wide air film 32, air filter film 33, gas shunt film 34, second outer clip 35. Detailed implementation manners

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] The following is a reference Figures 1-9 to illustrate the present invention: Embodiment: A nozzle includes a nozzle body 1. There is a first glue inlet 2 and a glue spraying port on the nozzle body 1. The nozzle body 1 is of a rectangular structure. The first glue inlet 2 is arranged at the rear side of the nozzle body 1, and the glue spraying port is arranged at the lower side of the nozzle body 1. This relative position design of the first glue inlet 2 and the glue spraying port makes the flow path of the glue in the nozzle body more reasonable, can reduce the flow resistance, and ensure the smooth flow of the glue.

[0030] It also includes a long strip-shaped connecting body 3. Four first glue outlets 4 are equidistantly arranged at intervals along the length direction of the connecting body 3. The first glue outlets 4 are arranged at the front side of the connecting body 3. The first glue outlets 4 provide a stable glue supply for each corresponding nozzle body 1.

[0031] A connecting channel 5 penetrating both sides along the length direction is arranged inside the connecting body 3. The first glue outlets 4 are communicated with the connecting channel 5. This design enables the glue to flow along the length direction in the connecting body 3 and provides a uniform glue supply for multiple nozzle bodies 1.

[0032] A second glue inlet 6 communicated with the connecting channel 5 is arranged on the connecting body 3. The second glue inlet 6 is arranged at the upper side of the connecting body 3. The second glue inlet 6 is used to receive the glue from the control valve 7.

[0033] The nozzle body 1 is fixedly connected to the connecting body 3, and the first glue inlet 2 is correspondingly connected to the first glue outlet 4. One first glue outlet 4 is correspondingly installed with one nozzle body 1, and four nozzle bodies 1 are installed on the connecting body 3. This one-to-one connection method ensures that each nozzle body 1 can independently obtain glue from the connecting body 3 and avoids mutual interference.

[0034] It also includes a control valve 7 fixedly connected to the connecting body 3. The control valve 7 is arranged at the upper side of the connecting body 3. The control valve 7 is used to control the on-off of the glue. A second glue outlet 8 is arranged at the lower end of the control valve 7. The second glue outlet 8 is connected to the second glue inlet 6, and a third glue inlet 16 is arranged on the rear side of the control valve 7. Through the control of the control valve 7, the supply time and supply amount of the glue can be accurately controlled to meet the requirements of different glue spraying processes.

[0035] Flow path of the glue liquid: The glue liquid passing through the gun body 15 enters the control valve 7 from the third glue inlet 16, then flows out from the second glue outlet 8 and enters the connecting channel 5 through the second glue inlet 6, and then enters the nozzle body 1 through the first glue outlet 4 and the first glue inlet 2, and finally sprays out from the glue spraying port. This flow path design enables the glue liquid to flow orderly in the system, reducing pressure loss and flow interference.

[0036] An air inlet 9 and a jet port are provided on the nozzle body 1. The air inlet 9 is arranged at the rear side of the nozzle body 1, and the jet port is arranged at the lower side of the nozzle body 1.

[0037] An air inlet channel 10 connected to the air inlet 9 is provided on the connecting body 3. The air inlet channel 10 runs through the front and rear sides of the connecting body 3, and the number and position of the air inlet channel 10 are correspondingly arranged with the first glue outlet 4. The setting of the gas-assisted system can help the glue liquid atomize and spray better, improving the glue spraying effect.

[0038] A spray gun includes a gun body 15 and multiple nozzles as described above. Multiple nozzles are arranged along the length direction of the gun body 15 in a head-to-tail connection. This arrangement enables the spray gun to perform glue spraying operations on multiple points simultaneously, improving work efficiency.

[0039] The connecting channels 5 of adjacent connecting bodies 3 are connected in communication, and one end of the connecting channels 5 located at both ends in the length direction of the gun body 15 that communicates with the outside is closed. This design forms a closed glue supply channel, enabling the glue liquid to flow within the entire spray gun system and achieving pressure balance.

[0040] A glue inlet channel 17 communicating with the third glue inlet 16 of the hole control valve 7 is provided in the gun body 15, for transporting the glue liquid from the glue supply source to the control valves 7 of each nozzle.

[0041] An air inlet channel 18 communicating with the air inlet channel 10 is provided in the gun body 15. The air inlet channel 18 is connected to the air supply source, for providing an air source for the gas-assisted system.

[0042] The air inlet channel 18 is connected to the air supply source, and the glue inlet channel 17 is connected to the glue supply source.

[0043] The nozzle adopts a modular design. Each nozzle includes components such as a nozzle body 1, a connecting body 3, and a control valve 7, which is convenient for production, installation, and maintenance. Multiple nozzles can be combined according to actual needs to form spray guns with different lengths and functions.

[0044] The gas-assisted system formed on the nozzle body 1 can help the glue liquid atomize and spray better, improving the uniformity and coverage of glue spraying, and further enhancing the glue spraying quality.

[0045] By setting the control valve 7, the on / off and supply volume of the adhesive can be precisely controlled, meeting the requirements of different glue spraying processes and improving the flexibility and adaptability of production.

[0046] Innovations and advantages of the technical solution of this application: Pressure balance mechanism: When multiple nozzles and spray guns are arranged end to end, the adjacent nozzles and spray guns are interconnected through the connecting channels 5 on the connecting body 3 to form a glue supply channel that connects all nozzles and spray guns. The glue in the spray gun first enters the connecting channel 5 and then enters the nozzle. In this way, even if there is a pressure difference in the glue supplied by different spray guns, after entering the connecting channel 5, they can converge and, through the adjustment of the connecting channel 5, approach pressure balance, thereby minimizing the adverse effects of the glue pressure difference on the glue spraying quality as much as possible.

[0047] The connecting body 3 is provided with a first fixing hole 11, and the first fixing hole 11 penetrates through the front and rear sides of the connecting body 3. The bolt is connected in the first fixing hole 11 to fixedly connect the connecting body 3 with the gun body 15.

[0048] The second glue inlet 6 is located at the middle position of the connecting channel 5. It enables the glue to flow from the central position to both sides, forming a symmetric pressure distribution field, which can effectively reduce the pressure loss along the way. After the glue enters from the second glue inlet 6, the path lengths of the glue flowing towards both ends of the connecting channel 5 are equal, and the flow resistances are also basically the same, so that the pressures at each first glue outlet 4 tend to be balanced.

[0049] The diameter of the first glue outlet 4 is smaller than that of the connecting channel 5. This helps the glue in the connecting channel 5 to achieve pressure balance. The smaller-diameter first glue outlet 4 increases the local resistance of the glue flowing out, making the pressure distribution in the connecting channel 5 more uniform.

[0050] The small-diameter design of the first glue outlet 4 can also effectively prevent the glue from flowing back. Especially when multiple spray guns work together, it can avoid the glue backflow phenomenon caused by pressure fluctuations and ensure the stability of the glue spraying process.

[0051] The inner side wall of the first air inlet channel 10 is provided with internal threads, and the nozzle body 1 is provided with a second fixing hole 12 corresponding to the first air inlet channel 10. The second fixing hole 12 penetrates through the front and rear sides of the nozzle body 1. The second fixing hole 12 passes through the first air inlet 9, and the diameter of the first air inlet 9 is larger than that of the second fixing hole 12. An air inlet bolt 13 is connected in the second fixing hole 12 and the first air inlet channel 10, and a communicating air hole 14 connecting the first air inlet channel 10 and the first air inlet 9 is provided on the air inlet bolt 13. The air inlet bolt 13 fixes the nozzle body 1 on the connecting body 3. The bolt head of the air inlet bolt 13 plugs the front side of the second fixing hole 12. A primary seal is achieved between the air inlet bolt 13 and the first air inlet channel 10 through a thread pair, and a secondary seal is achieved through the contact surface between the bolt head and the front side of the second fixing hole 12 with sealant.

[0052] After the gas enters the first intake passage 10 from the second intake passage 18, it enters the first intake port 9 through the connecting air holes 14, and then reaches the jet port through the air passage in the nozzle body 1.

[0053] In the above technical solution, the second fixing hole 12 of the nozzle body 1 and the first intake port 9 are arranged at the same position, which fully saves and utilizes the space.

[0054] A spray gun includes a gun body 15 and also includes the above-mentioned nozzle. An adhesive feeding passage 17 communicating with the third adhesive feeding port 16 of the hole control valve 7 is provided in the gun body 15. An air intake passage 18 communicating with the first air intake passage 10 is provided in the gun body 15. A plurality of nozzles are arranged on the gun body 15 along its length direction and are arranged end to end. The connecting passages 5 of adjacent connecting bodies 3 are connected in a communicating manner. The gun body 15 has a plurality of them and is arranged end to end. The connecting passages 5 of the connecting bodies 3 on adjacent gun bodies 15 are connected in a communicating manner. One end of the connecting passage on the gun bodies 15 at both ends that communicates with the outside is closed. The gun body 15 is fixedly installed on the equipment rack.

[0055] The docking part of the connecting passage 5 of adjacent connecting bodies 3 is sealed with an O-ring.

[0056] The end of the connecting passage 5 that communicates with the outside can be sealed with a plug. The plug is threadedly connected to the connecting passage 5, and sealant is applied at the thread. The end face of the plug is designed with an O-ring groove, and a heat-resistant fluororubber O-ring is installed.

[0057] The structure of the gun body 15 in this application is similar to the technologies disclosed in the patents with the patent authorization announcement numbers CN220861869U and CN219483238U in the background technology.

[0058] An adhesive feeding joint 19 connected to the adhesive feeding passage 17 is provided on the gun body 15, and an air intake joint 20 connected to the second air intake passage 18 is provided on the gun body 15.

[0059] The adhesive feeding passage 17 passes through a filter screen to filter the adhesive liquid.

[0060] A piston rod for blocking the second glue outlet 8 is provided in the control valve 7. A piston is connected to the piston rod. Air chambers are formed at both ends of the piston. The piston moves by intake and exhaust of air at both ends, and the piston movement drives the piston rod to close and open the second glue outlet 8.

[0061] The structure of the nozzle body 1 in this application is similar to the technology of the spray gun head disclosed in the patent with the patent authorization announcement number CN219483238U in the background technology.

[0062] The nozzle body 1 includes an outer clip 1 27, a wide film 26, a glue filter film 25, a wide film 26, a feed film 23, a jet piece 1 22, a jet film 21, a jet piece 2 31, a wide air piece 33, an air filter film 32, a wide air piece 33, a gas diverter 34, and an outer clip 2 35 that are stacked and attached to each other in sequence.

[0063] The specific structure of the nozzle body 1 of this application is disclosed in the patent with the publication (announcement) number CN119308026A.

[0064] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A nozzle, comprising a nozzle body, on which there are a first glue inlet and a glue spraying port, characterized in that: It further includes a strip-shaped connecting body, on which there are a plurality of first glue outlets arranged at intervals along its length direction; There is a connecting channel inside the connecting body running through both sides along its length direction; There is a second glue inlet on the connecting body that is communicated with the connecting channel; The nozzle body is fixedly connected to the connecting body, and the first glue inlet is correspondingly connected to the first glue outlet.

2. The nozzle according to claim 1, characterized in that: It further includes a control valve fixedly connected to the connecting body, and the second glue outlet of the control valve is connected to the second glue inlet.

3. The nozzle according to claim 2, characterized in that: There is a first air inlet and an air spraying port on the nozzle body, and there is a first air inlet channel connected to the first air inlet on the connecting body. The number and position of the first air inlet channels are correspondingly arranged with the first glue outlets.

4. A nozzle according to claim 2, characterized in that: There is a first fixing hole on the connecting body.

5. A nozzle according to claim 2, characterized in that: The second glue inlet is located at the middle position of the connecting channel.

6. A nozzle according to claim 2, characterized in that: The diameter of the first glue outlet is smaller than the diameter of the connecting channel.

7. A nozzle according to claim 3, characterized in that: There is an internal thread on the inner side wall of the first air inlet channel. There is a second fixing hole corresponding to the first air inlet channel on the nozzle body. The second fixing hole passes through the first air inlet. An air inlet bolt is connected inside the second fixing hole and the first air inlet channel. There is a communication air hole on the air inlet bolt that communicates the first air inlet channel and the first air inlet.

8. A spray gun, comprising a gun body, characterized in that: It further includes the nozzle according to any one of claims 2-7. There is a glue inlet channel inside the gun body that is communicated with the third glue inlet of the hole control valve. There is a second air inlet channel inside the gun body that is communicated with the first air inlet channel. A plurality of nozzles are arranged along the length direction of the gun body and are arranged end to end. The connecting channels of adjacent connecting bodies are communicated. The ends of the connecting channels at both ends of the gun body in the length direction that are communicated with the outside are closed.

9. A spray gun, comprising a gun body, characterized in that: It further includes the nozzle according to any one of claims 2-7. There is a glue inlet channel inside the gun body that is communicated with the third glue inlet of the hole control valve. There is a second air inlet channel inside the gun body that is communicated with the first air inlet channel. A plurality of nozzles are arranged along the length direction of the gun body and are arranged end to end; the gun body has a plurality of them and is arranged end to end. The ends of the connecting channels at both ends of the gun body that are communicated with the outside are closed.

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