A spray gun and rubber mixing machine

Abstract

The present application provides a kind of spray gun and glue mixer, spray gun includes cylinder, upper portion of cylinder forms gas pressure chamber, lower portion forms medium chamber;Sealing bushing, sealing bushing is arranged between gas pressure chamber and medium chamber;Nozzle, nozzle is connected with cylinder, nozzle is formed with medium flow passage in, medium flow passage is connected with medium chamber, and the spray end of nozzle forms a slope, and the spray port that is connected with medium flow passage is formed on the slope, and the center line of spray port and the axis of nozzle form preset angle;Piston plug, one end of piston plug has piston main body, and the other end has plug main body that passes through sealing bushing and extends to medium flow passage in.The advantages of the present application: the way of using piston plug to push medium to spray can ensure that medium is more stable when spraying, and the pushing pressure of piston plug is greater than the pushing pressure of gas;The design of nozzle can make glue better and more evenly sprayed on material, improve sizing effect, reduce glue waste.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of glue mixing equipment, in particular to a spray gun and a glue mixer. BACKGROUND

[0002] Particle board, also known as micro-particle board, granular board, and bagasse board, is a kind of man-made board made of wood or other lignocellulosic materials, which is glued under the action of heat and pressure after applying adhesive, also known as chipboard, mainly used for furniture manufacturing and building industry and train and automobile carriage manufacturing. Because the structure of particle board is relatively uniform and has good processing performance, it can be processed into large-size board according to needs, and is a good raw material for manufacturing furniture of different specifications and styles; the finished particle board does not need to be dried again and can be directly used, and has good sound absorption and sound insulation performance.

[0003] Glue mixing is a very important link in particle board production, and the cost of glue application accounts for more than 30% of the total production cost of particle board. A ring-type glue mixer is a kind of glue mixing equipment commonly used in particle board production. In order to spray glue onto the material in the ring-type glue mixer, a spray gun is arranged on one side of the existing ring-type glue mixer. In order to reduce the cost of glue application as much as possible, the existing technology usually uses a high-pressure spray gun for atomizing glue spraying. For example, a glue spraying spray gun is disclosed in Chinese Utility Model Patent No. CN201720875857.7, filed on July 18, 2017, which comprises a spray gun body having a liquid channel and a spray port channel, a gas channel arranged on the spray gun body, a flow guide device arranged in the spray gun body, and an atomizing cavity arranged near the spray port channel. The liquid channel and the gas channel are in communication with the atomizing cavity through the flow guide device. The glue spraying spray gun is provided with a liquid channel and a gas channel, which can supply liquid and gas at the same time, so it can be used as a double-fluid spray gun. It is suitable for the spraying process in the wood industry and can atomize glue with gas, which can ensure good atomization of glue.

[0004] However, the existing high-pressure spray gun has the following defects in actual use: 1. A straight jet nozzle is used, which will spray glue onto the cylinder wall during actual work, resulting in uneven glue application, the need to increase the amount of glue used, and the glue being easily attached to the cylinder wall to cause material jamming, which requires frequent shutdown for cleaning the glue attached to the cylinder wall. 2. The medium (i.e. glue) is pushed by gas for spraying, which has poor stability and poor atomization effect; at the same time, the medium cannot be turned off in time, so that the glue in the spray gun will still drip into the cylinder after the spray gun stops working. 3. It cannot be used for multiple types of medium, and the spray gun also needs to be replaced after the type of medium is changed, which is not convenient to use. In view of the above problems, the present application has been developed after in-depth research on the problem. SUMMARY

[0005] The technical problem solved by the present application is to provide a spray gun and a rubber mixing machine, which solves the problems of the existing spray gun, such as uneven glue application, the need to increase the amount of glue, the easy adhesion of glue to the cylinder wall to cause material jamming, the need for frequent shutdown to clean the glue adhered to the cylinder wall, poor stability and poor atomization effect when using gas to push the medium (i.e. glue) for spraying, the inability to turn off the medium in time, the glue in the spray gun still dripping into the cylinder after the spray gun stops working, and the inconvenience of using the spray gun for different types of medium.

[0006] The present application is implemented as follows:

[0007] In a first aspect, a spray gun comprises:

[0008] A cylinder body, an upper part of the cylinder body is formed with a gas pressure chamber, and a lower part of the cylinder body is formed with a medium chamber;

[0009] A sealing bushing is arranged between the gas pressure chamber and the medium chamber, and the gas pressure chamber and the medium chamber are isolated from each other by the sealing bushing;

[0010] A nozzle is connected to the cylinder body, a medium flow channel is formed in the nozzle along an axial direction, the medium flow channel is in communication with the medium chamber, a spray end of the nozzle is formed with a slope, a spray port in communication with the medium flow channel is formed on the slope, and a preset included angle is formed between a center line of the spray port and an axis of the nozzle;

[0011] A piston plug has a piston body limited in the gas pressure chamber at one end, and has a plug body extending through the sealing bushing and into the medium flow channel at the other end.

[0012] Further, a nozzle plug is further included, a side wall of the nozzle is formed with a plug chamber in communication with the spray port, and the nozzle plug is assembled in the plug chamber.

[0013] Further, the spray port comprises a first tapered cavity gradually reduced outward from the plug chamber, a second tapered cavity gradually reduced outward from the first tapered cavity, and a third tapered cavity gradually expanded outward from the second tapered cavity.

[0014] Further, the nozzle plug includes a first cone section at the front end, a first plugging section at the middle part, and a first threaded connection section at the end; the side wall of the first plugging section is formed with a first spiral medium guide groove, a transition section is formed between the first threaded connection section and the first plugging section, and a medium collection cavity in communication with the medium flow channel is formed between the transition section and the plug cavity.

[0015] The plug cavity includes a cylindrical threaded cavity and a cylindrical plugging cavity, the outer diameter of the cylindrical threaded cavity is larger than the outer diameter of the cylindrical plugging cavity; the inner wall of the cylindrical threaded cavity is formed with a first internal thread for screwing with the first threaded connection section, and the inner diameter of the cylindrical plugging cavity is equal to the outer diameter of the first plugging section.

[0016] Further, the plug body includes a second cone section at the front end, a second plugging section at the middle part, and a first connecting rod body at the rear end; the side wall of the second plugging section is formed with a second spiral medium guide groove.

[0017] The medium flow channel includes a first flow channel section at the upper part, a second flow channel section at the middle part, and a third flow channel section at the lower part; the caliber of the second flow channel section is smaller than the caliber of the first flow channel section, and the caliber of the third flow channel section is smaller than the caliber of the second flow channel section; a first tapered section gradually narrowing from top to bottom is formed between the first flow channel section and the second flow channel section, and a second tapered section gradually narrowing from top to bottom is formed between the second flow channel section and the third flow channel section; the outer diameter of the first connecting rod body is smaller than the caliber of the first flow channel section, and the outer diameter of the second plugging section is equal to the caliber of the second flow channel section.

[0018] Further, the piston body is connected with the first connecting rod body through a second connecting rod body, and a third cone section is formed between the second connecting rod body and the first connecting rod body; a gap is left between the second connecting rod body and the inner wall of the medium cavity.

[0019] Further, the outer wall of the upper end of the nozzle is formed with a second threaded connection section, a sealing groove is formed on the second threaded connection section, and a sealing ring is arranged in the sealing groove; the inner wall of the lower end of the medium cavity is formed with a second internal thread for screwing with the second threaded connection section.

[0020] Further, the preset included angle is greater than 0° and less than 90°.

[0021] Further, the outer wall of the cylinder is formed with an air pressure input port in communication with the air pressure cavity and a medium input port in communication with the medium cavity.

[0022] In a second aspect, a rubber mixing machine uses the above-mentioned spray gun.

[0023] By adopting the technical solution of the present invention, at least the following beneficial effects are achieved:

[0024] 1. This invention changes the traditional method of directly propelling the medium with gas. It creates a pressure chamber and a medium chamber within the cylinder, and uses a sealing bushing to isolate them into two independent spaces. One end of the piston plug has a piston body that is confined within the pressure chamber, while the other end has a plug body that extends into the medium flow channel of the nozzle. This allows the reciprocating motion of the piston plug to propel the medium during operation. Compared to the method of directly propelling the medium with gas, this invention's method of using a piston plug to propel the medium ensures more stable medium injection. Furthermore, the pushing pressure of the piston plug is greater than that of the gas; actual testing shows that the pushing pressure of the piston plug can reach 100 kg, thus improving the atomization effect of the medium.

[0025] 2. This design changes the traditional method of directly spraying the medium using a straight nozzle. Instead, it incorporates an angled nozzle tip with a spray port connected to the medium flow channel. The centerline of the spray port forms a preset angle with the nozzle axis, ensuring the medium is sprayed at a predetermined angle instead of in a straight line. Since the spray gun is positioned on one side of the mixer, simply aligning the angled nozzle tip towards the mixing mechanism prevents direct spraying of adhesive onto the drum wall. This allows for better and more even application of the adhesive, improving the bonding effect and reducing waste, thus lowering particleboard production costs. Furthermore, the reduced amount of adhesive falling onto the drum wall decreases the likelihood of jamming, reducing downtime for cleaning and minimizing production disruptions.

[0026] 3. The piston plug is used to propel the medium for spraying. On the one hand, after the spray gun is used, the plug body can be used to seal the medium flow channel, thereby effectively shutting off the medium and ensuring that the glue inside the spray gun will not continue to fall into the glue mixer after the spray gun stops working. This avoids glue waste and the trouble caused by glue adhering to the cylinder wall and causing material jamming. On the other hand, the piston plug can also be used to control the flow of the medium, which helps to improve the glue application effect.

[0027] 4. By forming a plug chamber on the side wall of the nozzle, and equipping the plug chamber with a nozzle plug, the nozzle plug having a first sealing section and a first conical section, the first spiral medium guide groove of the first sealing section can guide the medium during use, so that the medium produces a spiral effect, thereby improving the atomization effect of the medium when it is sprayed out; at the same time, the first conical section can cooperate with the injection port to adjust the injection flow rate of the medium.

[0028] 5、Through the conical structure design of the spray port, on one hand, it can realize greater atomization spray angle, and through actual use, it can reach about 120° atomization spray angle; on the other hand, it can bear various types of medium, including oily glue, viscous glue and the like, and will not affect the atomization spray effect due to different medium.

[0029] 6、Through forming the second threaded connection section at the upper end of the nozzle and the second internal thread at the lower end of the medium chamber, when in use, the nozzle and the cylinder can be threadedly connected together by using the second threaded connection section and the second internal thread, and meanwhile, the nozzle can be conveniently disassembled and replaced. BRIEF DESCRIPTION OF DRAWINGS

[0030] The application will be further described below with reference to the accompanying drawings and embodiments.

[0031] Figure 1 is the sectional view of the spray gun of the present application;

[0032] Figure 2 is the sectional view of the nozzle part of the spray gun of the present application;

[0033] Figure 3 is the sectional view of the position of the air pressure chamber and the sealing sleeve of the spray gun of the present application;

[0034] Figure 4 is the sectional view of the nozzle with nozzle plug of the present application;

[0035] Figure 5 is the sectional view of the nozzle without nozzle plug of the present application;

[0036] Figure 6 is the sectional view of the nozzle with nozzle plug of the present application; Figure 5 is the enlarged view of part A of the present application;

[0037] Figure 7 is the top view of the spray gun of the present application;

[0038] Figure 8 is the structure view of the nozzle plug of the present application;

[0039] Figure 9 is the sectional view of the piston plug of the present application;

[0040] Figure 10 is the overall view of the glue mixing machine of the present application;

[0041] Figure 11 is the sectional view of the glue mixing machine of the present application.

[0042] BRIEF DESCRIPTION OF DRAWINGS

[0043] 100-spray gun;

[0044] 200 - rubber mixing machine, 201 - mixing drum body, 202 - stirring mechanism, 203 - spray gun mounting port;

[0045] 1 - cylinder, 11 - pneumatic chamber, 12 - medium chamber, 13 - pneumatic input port, 14 - medium input port, 15 - end cover;

[0046] 2 - sealing bushing;

[0047] 3 - nozzle, 31 - medium flow channel, 311 - first flow channel section, 312 - second flow channel section, 313 - third flow channel section, 314 - first tapered section, 315 - second tapered section, 32 - inclined surface, 33 - jet port, 331 - first tapered cavity, 332 - second tapered cavity, 333 - third tapered cavity, 34 - second threaded connection section, 35 - sealing groove, 36 - sealing ring, 37 - plug chamber, 371 - cylindrical screwing cavity, 372 - cylindrical plugging cavity;

[0048] 4 - piston plug, 41 - piston main body, 42 - plug main body, 421 - second tapered section, 422 - second plugging section, 4221 - second helical medium guide groove, 423 - first connecting rod body, 43 - second connecting rod body, 44 - third tapered section;

[0049] 5 - nozzle plug, 51 - first tapered section, 52 - first plugging section, 521 - first helical medium guide groove, 53 - first threaded connection section, 531 - rotating groove, 54 - transition section, 55 - medium collection cavity.

DETAILED DESCRIPTION

[0050] In order to better understand the technical solutions of the present application, the technical solutions of the present application will be described in detail below in combination with the drawings of the specification and specific embodiments.

[0051] It should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing these embodiments and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" and the like can explicitly or implicitly include one or more of the features.

[0052] Please refer to Figures 1 to 9As shown, a preferred embodiment of a spray gun 100 of the present application comprises:

[0053] A cylinder 1, an upper portion of the cylinder 1 is formed with a gas pressure chamber 11, and a lower portion of the cylinder 1 is formed with a medium chamber 12; wherein the gas pressure chamber 11 is used for passing in gas to form high pressure, and the medium chamber 12 is used for passing in medium which needs to be atomized and sprayed, and the medium can be various types of glue;

[0054] A sealing bush 2 is arranged between the gas pressure chamber 11 and the medium chamber 12, and the sealing bush 2 is used for isolating the gas pressure chamber 11 and the medium chamber 12 from each other, that is, the gas pressure chamber 11 and the medium chamber 12 are two independent spaces, and only gas passes in the gas pressure chamber 11, and only medium passes in the medium chamber 12, and they do not affect each other;

[0055] A nozzle 3 is connected with the cylinder 1, the nozzle 3 is formed with a medium flow channel 31 along an axial direction, and the medium flow channel 31 is connected with the medium chamber 12, and the medium in the medium chamber 12 enters into the nozzle 3 through the medium flow channel 31; a spray end of the nozzle 3 is formed with a slope 32, the slope 32 is formed with a spray port 33 which is connected with the medium flow channel 31, and a center line of the spray port 33 and an axis of the nozzle 3 form a preset included angle, so that the nozzle 3 no longer sprays the medium in a straight manner, but sprays the medium at a preset included angle;

[0056] A piston plug 4, one end of the piston plug 4 is provided with a piston body 41 which is limited in the gas pressure chamber 11, and the other end of the piston plug 4 is provided with a plug body 42 which passes through the sealing bush 2 and extends into the medium flow channel 12, and the sealing bush 2 is arranged on one hand to effectively isolate the gas pressure chamber 11 and the medium chamber 12, and on the other hand to ensure that the piston plug 4 can flexibly reciprocate, so that the piston plug 4 has the functions of controlling the amount of glue and controlling the on-off of the medium.

[0057] By adopting the technical scheme of the present application, at least the following beneficial effects are achieved:

[0058] 1. Change the traditional way of using gas to directly push the medium for spraying, form a gas pressure chamber 11 and a medium chamber 12 in the cylinder body 1, and use the sealing sleeve 2 to isolate the gas pressure chamber 11 and the medium chamber 12 into two independent spaces, while one end of the piston plug 4 has a piston body 41 limited in the gas pressure chamber 11, and the other end of the piston plug 4 has a plug body 42 extending into the medium flow channel 12 of the nozzle 3, so that during work, the reciprocating movement of the piston plug 4 can be used to push the medium for spraying; compared with the way of directly pushing the medium with gas, the way of using the piston plug 4 to push the medium for spraying can ensure that the medium is sprayed more stably, and the pushing pressure of the piston plug 4 is greater than that of the gas, which can reach 100 kg through actual test, so the atomization effect of the medium can be improved.

[0059] 2. Change the traditional way of directly spraying the medium with a straight jet nozzle, form a slope 32 at the spraying end of the nozzle 3, form a spraying port 33 on the slope 32 which is communicated with the medium flow channel 31, and form a preset included angle between the center line of the spraying port 33 and the axis of the nozzle 3, so that the medium is no longer sprayed in a straight line during work, but is sprayed out at a preset included angle; since the spray gun 100 is arranged on one side of the glue mixer, only the slope 32 of the nozzle 3 needs to be directed towards the stirring mechanism in the glue mixer during installation of the spray gun 100, so that the spray gun 100 can avoid directly spraying glue onto the barrel wall, on the one hand, the glue can be better and more evenly sprayed onto the material, the gluing effect is improved, and glue waste is reduced, thereby helping to reduce the production cost of the particle board; on the other hand, the glue falling onto the barrel wall is reduced, the probability of material jamming caused by glue adhering to the barrel wall is reduced, and the frequency of stopping the equipment for cleaning is reduced, thereby reducing the impact on production.

[0060] 3. The piston plug 4 is used to push the medium for spraying, on the one hand, after the use of the spray gun 100, the medium flow channel 12 can be plugged by the plug body 42, so that the medium is effectively shut off, and the glue in the spray gun 100 will not continue to fall into the glue mixer after the spray gun 100 stops working, which avoids the waste of glue and the trouble caused by the glue adhering to the barrel wall; on the other hand, the piston plug 4 can also be used to control the flow of the medium, which helps to improve the gluing effect.

[0061] In the preferred embodiment of the present application, in order to achieve better atomization and spraying effect, the spray gun 100 further comprises a nozzle plug 5; the side wall of the nozzle 3 is formed with a plug chamber 37 communicated with the spraying port 33, and the nozzle plug 5 is assembled in the plug chamber 37, so that the nozzle plug 5 can make the glue form better atomization effect.

[0062] As a specific embodiment of the present application, the nozzle plug 5 comprises a first taper section 51 at the front end, a first plugging section 52 at the middle part, and a first threaded connecting section 53 at the end; the side wall of the first plugging section 52 is formed with a first spiral medium guide groove 521, which is used to guide the medium and make the medium produce a spiral effect when passing through the first plugging section 52, which helps to improve the atomization effect; a transition section 54 is formed between the first threaded connecting section 53 and the first plugging section 52, and the transition section 54 and the plug chamber 37 form a medium collection cavity 55 connected with the medium flow channel 31, so that the medium flowing out of the medium flow channel 31 is gathered into the medium collection cavity 55, and then forms a spiral effect under the guidance of the first spiral medium guide groove 521 on the first plugging section 52.

[0063] The plug chamber 37 comprises a cylindrical threaded cavity 371 and a cylindrical plugging cavity 372, the outer diameter of the cylindrical threaded cavity 371 is larger than that of the cylindrical plugging cavity 372, so that a step is formed between the cylindrical threaded cavity 371 and the cylindrical plugging cavity 372, which is used to limit the first threaded connecting section 53 of the nozzle plug 5; the inner wall of the cylindrical threaded cavity 371 is formed with a first internal thread (not shown) for screwing with the first threaded connecting section 53, so as to realize the threaded connection of the nozzle plug 5 and the nozzle 3; the inner diameter of the cylindrical plugging cavity 372 is equal to the outer diameter of the first plugging section 52, so as to ensure that the medium can only flow through the first spiral medium guide groove 521.

[0064] The present application forms the plug chamber 37 on the side wall of the nozzle 3, and the nozzle plug 5 is arranged in the plug chamber 37, and the nozzle plug 5 has the first plugging section 52 and the first taper section 51, so that in use, the first spiral medium guide groove 521 of the first plugging section 52 can guide the medium and make the medium produce a spiral effect, thereby improving the atomization effect of the medium when being sprayed; at the same time, the first taper section 51 can cooperate with the spray port 33 to adjust the spray flow of the medium.

[0065] In the preferred embodiment of the present application, the end face of the first threaded connecting section 53 is formed with a rotation groove 531, so as to facilitate the rotation operation of the nozzle plug 5 by cooperating with the rotation groove 531 by using a tool, thereby realizing the threaded connection of the nozzle plug 5 and the nozzle 3.

[0066] In the preferred embodiment of the present application, the injection port 33 comprises a first tapered cavity 331 gradually narrowing outward from the plug chamber 37, a second tapered cavity 332 gradually narrowing outward from the first tapered cavity 331, and a third tapered cavity 333 gradually expanding outward from the second tapered cavity 332. By adopting the tapered structure design of the injection port 33 of the present application, on the one hand, a larger atomization injection angle can be achieved, which can reach about 120° in actual use; on the other hand, various types of media, including oily glue, viscous glue, etc., can be carried without affecting the atomization injection effect due to different media.

[0067] In the specific implementation of the present application, since the first tapered section 51 is formed at the front end of the nozzle plug 5, and the second tapered cavity 332 is formed in the middle of the injection port 33, when the first tapered section 51 of the nozzle plug 5 is screwed into the second tapered cavity 332, the deeper the first tapered section 51 is screwed in, the smaller the gap between the second tapered cavity 332 and the first tapered section 51, and the smaller the injection flow of the nozzle 3; on the contrary, the shallower the first tapered section 51 is screwed in, the larger the gap between the second tapered cavity 332 and the first tapered section 51, and the larger the injection flow of the nozzle 3, so that the injection flow of the medium can be adjusted; at the same time, the second tapered cavity 332 and the first tapered section 51 are both tapered structures, and the cooperation of the two can produce good tapered atomization effect of the medium.

[0068] In the preferred embodiment of the present application, the plug body 42 comprises a second tapered section 421 at the front end, a second plugging section 422 at the middle, and a first connecting rod body 423 at the rear end, the side wall of the second plugging section 422 is formed with a second spiral medium guide groove 4221, the second spiral medium guide groove 4221 is used for guiding the medium, so that the medium produces a spiral effect when passing through the second plugging section 422;

[0069] The medium flow channel 31 comprises a first flow channel section 311 at the upper portion, a second flow channel section 312 at the middle portion, and a third flow channel section 313 at the lower portion, the caliber of the second flow channel section 312 is smaller than that of the first flow channel section 311, and the caliber of the third flow channel section 313 is smaller than that of the second flow channel section 312; a first taper section 314 gradually narrowing from top to bottom is formed between the first flow channel section 311 and the second flow channel section 312, and a second taper section 315 gradually narrowing from top to bottom is formed between the second flow channel section 312 and the third flow channel section 313; the outer diameter of the first connecting rod body 423 is smaller than the caliber of the first flow channel section 311, so that the medium can flow through the gap between the first connecting rod body 423 and the first flow channel section 311; the outer diameter of the second sealing section 422 is equal to the caliber of the second flow channel section 312, so that the medium can only flow through the second spiral medium guide groove 4221 of the second sealing section 422, and the medium produces a spiral effect.

[0070] The medium flow channel 31 comprises a first flow channel section 311 at the upper portion, a second flow channel section 312 at the middle portion, and a third flow channel section 313 at the lower portion, the caliber of the second flow channel section 312 is smaller than that of the first flow channel section 311, and the caliber of the third flow channel section 313 is smaller than that of the second flow channel section 312; a first taper section 314 gradually narrowing from top to bottom is formed between the first flow channel section 311 and the second flow channel section 312, and a second taper section 315 gradually narrowing from top to bottom is formed between the second flow channel section 312 and the third flow channel section 313; the outer diameter of the first connecting rod body 423 is smaller than the caliber of the first flow channel section 311, so that the medium can flow through the gap between the first connecting rod body 423 and the first flow channel section 311; the outer diameter of the second sealing section 422 is equal to the caliber of the second flow channel section 312, so that the medium can only flow through the second spiral medium guide groove 4221 of the second sealing section 422, and the medium produces a spiral effect.

[0071] In the preferred embodiment of the present application, the piston body 41 is connected with the first connecting rod body 423 through the second connecting rod body 43, and a third taper section 44 is formed between the second connecting rod body 43 and the first connecting rod body 423; a gap is left between the second connecting rod body 43 and the inner wall of the medium chamber 11, so that the medium can flow through the gap. During operation, the piston body 41 can be driven to reciprocate under the action of the air pressure in the air pressure chamber 11, and the piston body 41 can drive the entire plug body 42 to reciprocate through the second connecting rod body 43, so that the plug body 42 can push the medium in the medium chamber 11 forward and produce an atomization effect under the action of the nozzle 3; during specific implementation, the flow control of the medium can be realized by controlling the stroke size of the reciprocating movement of the plug body 42.

[0072] In the preferable embodiment of the present application, the outer wall of the upper end of the nozzle 3 is formed with a second threaded connecting section 34, the second threaded connecting section 34 is formed with a sealing groove 35, and a sealing ring 36 is arranged in the sealing groove 35. The arrangement of the sealing ring 36 can ensure the sealing effect and prevent the glue from leaking. The inner wall of the lower end of the medium chamber 11 is formed with a second inner thread (not shown) which is screwed with the second threaded connecting section 34. In use, the nozzle 3 can be screwed with the cylinder body 1 by means of the cooperation of the second threaded connecting section 34 and the second inner thread, and the nozzle 3 can be conveniently disassembled and replaced. For example, in use, the user can replace the nozzle 3 with different preset angles according to the actual use requirements, so as to better meet the actual use requirements.

[0073] In the preferable embodiment of the present application, in order to ensure that the nozzle 3 does not spray glue in a straight way, the preset angle is greater than 0° and less than 90°.

[0074] As a preferable embodiment of the present application, in order to improve the glue spraying effect and make the glue better sprayed on the material, the preset angle is greater than or equal to 30° and less than or equal to 60°.

[0075] As a most preferable embodiment of the present application, the preset angle is 45°.

[0076] In the preferable embodiment of the present application, the center line of the spraying port 33 is perpendicular to the inclined surface 32, so that the glue can be sprayed out in a more uniform atomized manner, thereby making the material gluing more uniform and being beneficial to improving the glue applying effect on the material.

[0077] In the preferable embodiment of the present application, the outer wall of the cylinder body 1 is formed with a gas pressure input port 13 which is communicated with the gas pressure chamber 11 and a medium input port 14 which is communicated with the medium chamber 12. In work, the gas pressure input port 13 can be used to deliver gas pressure into the gas pressure chamber 11, and the medium input port 14 can be used to deliver medium into the medium chamber 12. In the specific implementation of the present application, the top of the gas pressure chamber 11 is provided with an end cover 15 which is locked and connected with the cylinder body 1 by means of bolts, and the gas pressure input port 13 is arranged on the end cover 15. By locking and connecting the end cover 15 with the cylinder body 1 by means of bolts, the end cover 15 can be opened during assembly, so that the sealing shaft sleeve 2 and the piston plug 4 can be installed into the cylinder body 1.

[0078] Please refer to Figures 1 to 11As shown, the present invention also provides a glue mixer 200, which includes a spray gun 100. The specific structure of the spray gun 100 is described in detail above and will not be repeated here.

[0079] In a specific implementation of the present invention, the glue mixer 200 includes a mixing cylinder body 201 and a stirring mechanism 202 disposed inside the mixing cylinder body 201; a spray gun mounting port 203 communicating with the interior of the mixing cylinder body 201 is provided on one side of the mixing cylinder body 201, and the spray gun 100 is installed in the spray gun mounting port 203, with the inclined surface 32 of the nozzle 3 at the lower end of the spray gun 100 facing the stirring mechanism 202, so that the spray gun 100 can spray the glue onto the material better and more evenly, thereby improving the glue application effect of the material.

[0080] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A spray gun characterized in that, include: The cylinder body has a pressure chamber formed in the upper part and a medium chamber formed in the lower part. A sealing bushing is disposed between the air pressure chamber and the medium chamber, thereby isolating the air pressure chamber and the medium chamber from each other. The nozzle is connected to the cylinder body. A medium flow channel is formed inside the nozzle along the axial direction and is connected to the medium chamber. The spray end of the nozzle forms an inclined surface, and a spray port connected to the medium flow channel is formed on the inclined surface. A preset angle is formed between the center line of the spray port and the axis of the nozzle. A piston plug, one end of which has a piston body that is confined within the air pressure chamber, and the other end of which has a plug body that passes through the sealing bushing and extends into the medium flow channel.

2. The lance of claim 1, wherein: It also includes a nozzle plug; the sidewall of the nozzle is formed with a plug chamber that communicates with the injection port, and the nozzle plug is assembled in the plug chamber.

3. The lance of claim 2, wherein: The injection port includes a first conical cavity that gradually decreases outward from the plug chamber, a second conical cavity that gradually decreases outward from the first conical cavity, and a third conical cavity that gradually increases outward from the second conical cavity.

4. The lance of claim 2, wherein: The nozzle plug includes a first conical section at the front end, a first sealing section in the middle, and a first threaded connection section at the end. A first spiral medium guide groove is formed on the side wall of the first sealing section. A transition section is formed between the first threaded connection section and the first sealing section. A medium collection cavity that communicates with the medium flow channel is formed between the transition section and the plug chamber. The plug chamber includes a cylindrical threaded cavity and a cylindrical sealing cavity. The outer diameter of the cylindrical threaded cavity is larger than the outer diameter of the cylindrical sealing cavity. The inner wall of the cylindrical threaded cavity is formed with a first internal thread that is threaded to the first threaded connection section. The inner diameter of the cylindrical sealing cavity is equal to the outer diameter of the first sealing section.

5. The lance of claim 1, wherein: The plug body includes a second conical section at the front end, a second sealing section in the middle, and a first connecting rod at the rear end. The side wall of the second sealing section forms a second spiral medium guide groove. The medium flow channel includes a first flow channel section at the top, a second flow channel section in the middle, and a third flow channel section at the bottom. The diameter of the second flow channel section is smaller than that of the first flow channel section, and the diameter of the third flow channel section is smaller than that of the second flow channel section. A first conical section that gradually decreases in size from top to bottom is formed between the first flow channel section and the second flow channel section, and a second conical section that gradually decreases in size from top to bottom is formed between the second flow channel section and the third flow channel section. The outer diameter of the first connecting rod is smaller than that of the first flow channel section, and the outer diameter of the second sealing section is equal to that of the second flow channel section.

6. The lance of claim 5, wherein: The piston body is connected to the first connecting rod body via a second connecting rod body, and a third conical section is formed between the second connecting rod body and the first connecting rod body; a gap is left between the second connecting rod body and the inner wall of the medium chamber.

7. The lance of claim 1 wherein: An outer wall of an upper end of the nozzle is formed with a second threaded connecting section, a sealing groove is formed on the second threaded connecting section, and a sealing ring is arranged in the sealing groove; and an inner wall of a lower end of the medium chamber is formed with a second internal thread for screwing with the second threaded connecting section.

8. The lance of claim 1 wherein: The preset included angle is greater than 0° and less than 90°.

9. The lance of claim 1 wherein: An outer wall of the cylinder is formed with a gas pressure input port communicated with the gas pressure chamber and a medium input port communicated with the medium chamber.

10. A rubber mixing machine characterized by: The glue mixer uses the spray gun according to any one of claims 1-9.

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