Dispensing valve assembly, coating mechanism and coating machine

Abstract

The utility model belongs to the technical field of coating machines, and particularly relates to a dispensing valve assembly, a coating mechanism and a coating machine, and the dispensing valve assembly comprises a valve body and a backflow cover; a glue outlet part is arranged at the bottom of the valve body, a glue inlet is formed in the side part of the valve body, and an air inlet and an automatic exhaust port are formed above the glue inlet; the backflow cover comprises a connecting part, a connecting hole is formed in the connecting part and connected to the side portion of the glue outlet part, a heating wire is arranged in the connecting part, the edge of the bottom of the connecting part extends downwards to form a side wall to form a backflow cavity, a backflow hole is formed in the side wall and connected with a negative pressure device, and the heating wire heats the glue outlet part. According to the dispensing valve assembly, the mobility of glue in the glue outlet part is improved, and the glue is sucked out of the glue outlet part under the acting force of negative pressure and flows back and is collected along the backflow hole, so that the glue remaining in the glue outlet part is reduced, the phenomenon that the glue outlet part is blocked is reduced, and the service life of the dispensing valve assembly is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of coating machines, and particularly relates to a dispensing valve assembly, a coating mechanism and a coating machine. Background Art

[0002] Coating machines are mainly used to spray liquid coatings onto the surfaces of workpieces to be sprayed in the product production process, so some people also call them glue coating machines, glue spraying machines, oil spraying machines, etc.

[0003] Currently, the nozzles of coating machines all work automatically. After the work is completed, glue will remain on the nozzles. If the nozzles cannot be effectively cleaned, it will affect subsequent work. The existing methods for cleaning the nozzles usually include the following: First, manual operation during shutdown, which affects the operation progress and is also difficult to ensure the cleanliness; Second, dealing with it in the form of jet air, but some glue is easy to solidify on the nozzles and cannot be removed by blowing air. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a dispensing valve assembly, a coating mechanism and a coating machine, aiming to solve the technical problem that some glue in the prior art is easy to solidify on the nozzles and cannot be removed by blowing air.

[0005] To achieve the above purpose, a dispensing valve assembly provided by an embodiment of the utility model includes a valve body and a reflux cover;

[0006] An adhesive outlet is arranged at the bottom of the valve body, an adhesive inlet is arranged at the side of the valve body, and an air inlet and an automatic exhaust port are arranged above the adhesive inlet;

[0007] The reflux cover includes a connecting part, a connecting hole is arranged in the connecting part, the connecting hole is connected to the side of the adhesive outlet, a heating wire is arranged in the connecting part, the bottom edge of the connecting part extends downward to form a side wall to form a reflux cavity, and a reflux hole is arranged on the side wall, and the reflux hole is connected to the negative pressure device.

[0008] Optionally, the connection between the connecting hole and the adhesive outlet is a threaded connection.

[0009] Optionally, the horizontal interface of the connecting part is a regular hexagon structure.

[0010] Optionally, a sealing member is arranged at the bottom of the connecting part.

[0011] Optionally, the diameter of the sealing member is smaller than the diameter of the connecting hole.

[0012] Optionally, the diameter of the reflux cavity decreases in the direction away from the connecting part.

[0013] One or more of the above technical solutions in the dispensing assembly provided by the embodiments of the present utility model have at least one of the following technical effects: When the processing is completed, the negative pressure device and the heating wire operate simultaneously, causing a negative pressure to form in the reflux chamber. Since the heating wire heats the glue outlet part, the fluidity of the glue in the glue outlet part is increased. Under the action of the negative pressure, the glue is sucked out from the glue outlet part and collected by flowing back along the reflux hole, thereby reducing the glue remaining in the glue outlet part, reducing the phenomenon of blockage of the glue outlet part, and improving the service life of the dispensing valve assembly.

[0014] A coating mechanism includes the above-mentioned dispensing valve assembly.

[0015] Optionally, it further includes a CCD assembly, and the CCD assembly is installed on the side of the dispensing valve assembly.

[0016] One or more of the above technical solutions in the coating mechanism provided by the embodiments of the present utility model have at least one of the following technical effects: Since the above-mentioned dispensing valve assembly is adopted, when the processing is completed, the negative pressure device and the heating wire operate simultaneously, causing a negative pressure to form in the reflux chamber. Since the heating wire heats the glue outlet part, the fluidity of the glue in the glue outlet part is increased. Under the action of the negative pressure, the glue is sucked out from the glue outlet part and collected by flowing back along the reflux hole, thereby reducing the glue remaining in the glue outlet part, reducing the phenomenon of blockage of the glue outlet part, and improving the service life of the dispensing valve assembly.

[0017] A coating machine includes the above-mentioned coating mechanism.

[0018] Optionally, it further includes a workbench, a conveying mechanism and a moving mechanism installed on the workbench. The moving mechanism is installed above the conveying mechanism, and the coating mechanism is installed on the moving mechanism. The conveying mechanism includes a fixed frame, a moving frame and an adjusting component. The fixed frame is fixed on the workbench, the moving frame is slidably connected to the workbench, and the adjusting component is connected to the moving frame for driving the moving frame to move.

[0019] One or more of the above technical solutions in the coating machine provided by the embodiments of the present utility model have at least one of the following technical effects: Since the above-mentioned dispensing valve assembly is adopted, when the processing is completed, the negative pressure device and the heating wire operate simultaneously, causing a negative pressure to form in the reflux chamber. Since the heating wire heats the glue outlet part, the fluidity of the glue in the glue outlet part is increased. Under the action of the negative pressure, the glue is sucked out from the glue outlet part and collected by flowing back along the reflux hole, thereby reducing the glue remaining in the glue outlet part, reducing the phenomenon of blockage of the glue outlet part, and improving the service life of the dispensing valve assembly. Description of the Drawings

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of 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.

[0021] Figure 1 It is a schematic structural diagram of a coating machine provided by an embodiment of the present invention.

[0022] Figure 2 It is a schematic structural diagram of a coating mechanism provided by an embodiment of the present invention.

[0023] Figure 3 It is a schematic structural diagram of a dispensing valve assembly provided by an embodiment of the present invention.

[0024] Figure 4 It is a cross-sectional view of the glue outlet part in the dispensing valve assembly provided by an embodiment of the present invention.

[0025] Figure 5 It is a schematic structural diagram of a CCD assembly provided by an embodiment of the present invention.

[0026] Figure 6 It is another schematic structural diagram of a CCD assembly provided by an embodiment of the present invention.

[0027] Figure 7 It is a schematic structural diagram of a jacking member provided by an embodiment of the present invention.

[0028] Figure 8 It is a partial enlarged schematic diagram of a CCD assembly provided by an embodiment of the present invention.

[0029] Among them, the reference numerals in the figure are as follows:

[0030] 10 - coating mechanism, 11 - fixing plate, 12 - dispensing valve assembly

[0031] 121 - valve body, 122 - reflux cover, 1221 - connecting part

[0032] 1222 - connecting hole, 1223 - heating wire, 1224 - side wall

[0033] 123 - glue outlet part, 124 - glue inlet, 125 - air inlet

[0034] 126 - automatic exhaust port, 13 - CCD assembly, 131 - CCD

[0035] 132 - slider, 133 - mounting seat, 134 - jacking member

[0036] 1341 - Guide arc surface 14 - Protection component 141 - Protection shell

[0037] 142 - Cover plate 1421 - Boss 1422 - Ball

[0038] 143 - Elastic hinge 20 - Workbench 30 - Conveyor mechanism

[0039] 31 - Fixed frame 32 - Moving frame 33 - Adjustment component

[0040] 34 - Blocking cylinder 40 - Moving mechanism. Detailed implementation manners

[0041] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are intended to explain the embodiments of the present utility model, and should not be construed as a limitation of the present utility model.

[0042] In the description of the embodiments of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0043] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present utility model, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0044] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific situations.

[0045] In an embodiment of the present utility model, as Figures 1 to 4 shown, a dispensing valve assembly 12 is provided, which includes a valve body 121 and a reflux cover 122; a glue outlet portion 123 is provided at the bottom of the valve body 121, a glue inlet 124 is provided at the side portion of the valve body 121, and an air inlet 125 and an automatic exhaust port 126 are provided above the glue inlet 124.

[0046] The reflux cover 122 includes a connecting portion 1221, a connecting hole 1222 is provided in the connecting portion 1221, the connecting hole 1222 is connected to the side portion of the glue outlet portion 123, a heating wire 1223 is provided in the connecting portion 1221, a side wall 1224 extends downward from the bottom edge of the connecting portion 1221 to form a reflux cavity, and a reflux hole is provided on the side wall 1224, and the reflux hole is connected to the negative pressure device.

[0047] Specifically, after processing is completed, the negative pressure device and the heating wire 1223 operate simultaneously, so that a negative pressure is formed in the reflux cavity. Since the heating wire 1223 heats the glue outlet portion 123, the fluidity of the glue in the glue outlet portion 123 is increased. Under the action of the negative pressure, the glue is sucked out from the glue outlet portion 123 and flows back and is collected along the reflux hole, thereby reducing the glue remaining in the glue outlet portion 123, reducing the phenomenon of blockage of the glue outlet portion 123, and improving the service life of the dispensing valve assembly 12.

[0048] In another embodiment of the present utility model, a threaded connection is provided between the connecting hole 1222 and the glue outlet portion 123. Specifically, the reflux cover 122 and the glue outlet portion 123 are threadedly connected, enabling quick replacement.

[0049] In another embodiment of the present utility model, as Figures 2 to 3 shown, the horizontal interface of the connecting portion 1221 is a regular hexagon structure to facilitate the user to use tools to fix it.

[0050] In another embodiment of the present utility model, a sealing member is provided at the bottom of the connecting portion 1221, and the diameter of the sealing member is smaller than the diameter of the connecting hole 1222. In this way, the sealing performance between the glue outlet portion 123 and the reflux cavity is improved, and further the reflux collection effect is improved.

[0051] In another embodiment of the present utility model, as Figure 4 shown, the diameter of the reflux cavity decreases in the direction away from the connecting portion 1221. In this way, the gap between the reflux cavity and the glue outlet portion 123 gradually decreases, making the pressure stronger at the position closer to the glue outlet, so that the glue flowing out of the glue outlet can be better collected.

[0052] A coating mechanism 10 includes the above-mentioned dispensing valve assembly 12.

[0053] Specifically, since the above-mentioned dispensing valve assembly 12 is adopted, after processing is completed, the negative pressure device and the heating wire 1223 operate simultaneously, so that a negative pressure is formed in the reflux cavity. Since the heating wire 1223 heats the glue outlet part 123, the fluidity of the glue in the glue outlet part 123 is increased. Under the action of the negative pressure, the glue is sucked out from the glue outlet part 123 and collected by flowing back along the reflux hole, thereby reducing the glue remaining in the glue outlet part 123, reducing the phenomenon of blockage of the glue outlet part 123, and improving the service life of the dispensing valve assembly 12.

[0054] In another embodiment of the present invention, as Figures 5 to 8 shown, the coating mechanism 10 further includes a fixing plate 11, a CCD assembly 13 and a protection assembly 14;

[0055] The dispensing valve assembly 12 is installed on the fixing plate 11 and is used for dispensing glue to the product. Further, at least two dispensing valve assemblies 12 are provided, which can be selected according to the processing requirements, or different models of dispensing valve assemblies 12 can be set to simultaneously process different types of dispensing work;

[0056] The CCD assembly 13 includes a CCD 131, a slider 132, a mounting seat 133, a jacking member 134 and a driving member; the mounting seat 133 is installed on the fixing plate 11, the driving member is installed on the mounting seat 133, the slider 132 is slidably arranged on the mounting seat 133 and is connected to the end of the driving member, the jacking member 134 is installed on the slider 132, the CCD 131 is installed on the side of the jacking member, and a jacking part extends downward from the bottom of the jacking member 134;

[0057] The protection assembly 14 includes a protection shell 141, a cover plate 142 and an elastic hinge 143; the protection shell 141 and the cover plate 142 are connected by the elastic hinge 143, the protection shell 141 and the cover plate 142 form a closed protection cavity, and the CCD assembly 13 is arranged in the protection cavity.

[0058] Specifically, when the CCD 131 works, the driving member drives the slider 132 to move downward, the jacking member 134 moves downward, the jacking part contacts the cover plate 142, and the jacking member 134 continues to move downward to open the cover plate 142, so that the CCD 131 is exposed to position the product to be processed. After the detection is completed, the driving member drives the slider 132 to move upward, and the cover plate 142 covers the protection shell 141 under the action of the elastic hinge 143, so that the CCD 131 is located in the closed protection cavity, and when the dispensing valve assembly 12 works for spraying, it plays a role in protecting the CCD 131, can increase the continuous working time of the equipment, and does not need to stop the machine for cleaning.

[0059] In another embodiment of the present utility model, the bottom of the jacking part is lower than the CCD131. In this way, when the driving part drives the jacking part 134 to move downward, the jacking part first contacts the cover plate 142, avoiding the collision between the CCD131 and the cover plate 142, and thus further protecting the CCD131.

[0060] In another embodiment of the present utility model, a sealing member (not shown in the figure) is provided at the bottom of the protective shell 141. Specifically, the provided sealing member can strengthen the sealing performance between the cover plate 142 and the protective shell 141 when the cover plate 142 is closed, thereby further preventing the atomized glue from entering the protection cavity.

[0061] In another embodiment of the present utility model, a groove adapted to the sealing member is provided on the cover plate 142. Specifically, through the cooperation of the groove and the sealing member, the sealing effect is further enhanced.

[0062] In another embodiment of the present utility model, a buffer part is further provided at the bottom of the jacking part. Specifically, the provided buffer part can reduce the force generated by the collision between the jacking part and the cover plate 142, playing a protective role for both the cover plate 142 and the jacking part.

[0063] In another embodiment of the present utility model, the buffer part is made of any one of rubber, spring, and sponge. In this solution, it is made of rubber.

[0064] In another embodiment of the present utility model, as Figure 8 shown, a boss 1421 adapted to the jacking part is provided on the cover plate 142. Specifically, the provided boss 1421 plays a strengthening role and can better protect the cover plate 142.

[0065] In another embodiment of the present utility model, as Figure 7 shown, a guiding arc surface 1341 is provided at the bottom of the jacking part. Specifically, when opening, the boss 1421 moves from the bottom of the jacking part to the side of the jacking part along the guiding arc surface 1341, and the guiding arc surface 1341 plays a transitional role, thereby making the opening of the cover plate 142 smooth.

[0066] In another embodiment of the present utility model, as Figure 8 shown, a ball 1422 is provided at the top of the boss 1421. Specifically, the provided ball 1422 can reduce friction and make the opening of the cover plate 142 smoother.

[0067] A coating machine includes the above-mentioned coating mechanism 10.

[0068] Specifically, due to the adoption of the above-mentioned coating mechanism 10, after the processing is completed, the negative pressure device and the heating wire 1223 operate simultaneously, creating a negative pressure in the reflux chamber. Since the heating wire 1223 heats the glue outlet portion 123, the fluidity of the glue in the glue outlet portion 123 is increased. Under the action of the negative pressure, the glue is sucked out from the glue outlet portion 123 and collected by flowing back along the reflux hole, thereby reducing the glue remaining in the glue outlet portion 123, reducing the phenomenon of blockage of the glue outlet portion 123, and improving the service life of the dispensing valve assembly 12.

[0069] In another embodiment of the present invention, as Figure 1 shown, the coating machine includes a workbench 20, a conveying mechanism 30 and a moving mechanism 40 installed on the workbench 20. The moving mechanism 40 is installed above the conveying mechanism 30, and the coating mechanism 10 is installed on the moving mechanism 40. The conveying mechanism 30 includes a fixed frame 31, a moving frame 32 and an adjustment assembly 33. The fixed frame 31 is fixed on the workbench 20, the moving frame 32 is slidably connected to the workbench 20, and the adjustment assembly 33 is connected to the moving frame 32 and used to drive the moving frame 32 to move. Specifically, by driving the moving frame 32 to move through the adjustment assembly 33, the distance between the fixed frame 31 and the moving frame 32 is adjusted, thereby adapting to the conveying of products of different specifications.

[0070] In another embodiment of the present invention, a blocking cylinder 34 is further provided at one end of the conveying mechanism 30, and a blocking member is provided on the piston rod of the blocking cylinder 34. Specifically, the blocking cylinder 34 drives the blocking member to rise, thereby blocking the product and preventing the product from falling off the conveying mechanism 30.

[0071] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dispensing valve assembly, characterized in that, It includes: A valve body, at the bottom of which there is a glue outlet part, on the side of the valve body there is a glue inlet, above the glue inlet there are an air inlet and an automatic exhaust port; A reflux cover, which includes a connecting part, in the connecting part there is a connecting hole, the connecting hole is connected to the side part of the glue outlet part, in the connecting part there is a heating wire, the bottom edge of the connecting part extends downward to form a side wall to form a reflux cavity, the side wall is provided with a reflux hole, and the reflux hole is connected to a negative pressure device.

2. The dispensing valve assembly according to claim 1, wherein The connection between the connecting hole and the glue outlet part is a threaded connection.

3. The dispensing valve assembly according to claim 2, wherein, The horizontal cross-section of the connecting part is a regular hexagon structure.

4. The dispensing valve assembly according to claim 1, wherein, A seal is provided at the bottom of the connecting part.

5. The dispensing valve assembly according to claim 4, wherein, The diameter of the seal is smaller than the diameter of the connecting hole.

6. The dispensing valve assembly according to claim 1, wherein The diameter of the reflux cavity decreases in the direction away from the connecting part.

7. A coating mechanism, characterized in that, It includes the dispensing valve assembly according to any one of claims 1 to 6.

8. The coating mechanism according to claim 7, wherein, It further includes a CCD assembly, and the CCD assembly is installed on the side of the dispensing valve assembly.

9. A coating machine, characterized in that, It includes the coating mechanism according to claim 7 or 8.

10. The coating machine according to claim 9, wherein, It further includes a workbench, a conveying mechanism and a moving mechanism installed on the workbench, the moving mechanism is installed above the conveying mechanism, the coating mechanism is installed on the moving mechanism, the conveying mechanism includes a fixed frame, a moving frame and an adjusting component, the fixed frame is fixed on the workbench, the moving frame is slidably connected to the workbench, and the adjusting component is connected to the moving frame and used to drive the moving frame to move.

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