A glue application device

Abstract

The utility model discloses a kind of glue spraying devices, glue inlet valve rear end is equipped with shunt valve, shunt valve includes valve sleeve and valve core;Valve sleeve one end is equipped with the glue inlet of intercommunication glue inlet valve, valve sleeve other end is equipped with the valve core drive assembly of driving valve core reciprocating linear motion in valve sleeve;Several glue applying heads are evenly distributed on the axial direction of valve sleeve;Valve core outer wall is equipped with shunt main groove and several interval parallel distribution shunt branch groove, shunt main groove groove port intercommunication the glue inlet, each shunt branch groove intercommunication shunt main groove, each shunt branch groove is set to each glue applying head;Valve core drive assembly drives valve core reciprocating motion, the positional relationship of shunt branch groove and glue applying head switches between alignment intercommunication / misalignment closing two states.Effectively prevent the dripping phenomenon of glue water remaining in valve sleeve, shunt main groove, shunt branch groove of glue inlet valve rear end.

Description

Technical Field

[0001] This utility model relates to a glue-spraying device. Background Technology

[0002] Adhesive coating is a process of uniformly applying adhesive to the surface of an object by spraying or flowing, mainly used for bonding, encapsulation, or decoration. The adhesive is pressurized through a storage device and applied to the product requiring adhesive through an applicator. A problem with existing adhesive coating devices is that after the inlet valve is closed, adhesive residue remains in the pipe downstream of the valve. This residue is not controlled by the inlet valve and continues to drip from the pipe's outlet, leading to adverse consequences. To address this, we invented a liquid valve device (see Chinese Invention Patent Document: Publication No.: CN105797923A, Publication Date: 2016-07-27). When the inlet valve is closed, a negative pressure generating mechanism connected to the downstream diversion pipe prevents the dripping of residual adhesive. However, existing adhesive coating devices, in order to meet diversion requirements, still leave a significant amount of residual adhesive in the downstream diversion pipe, making it difficult to completely prevent dripping. Therefore, further improvements to the adhesive coating device are needed. Utility Model Content

[0003] To address the aforementioned drawbacks, the technical problem this invention aims to solve is to provide a glue-applying device that effectively prevents residual glue from dripping from the diversion pipe at the rear end of the glue inlet valve. The technical solution adopted by this invention is a glue-applying device comprising a glue inlet valve, characterized in that a diversion valve is provided at the rear end of the glue inlet valve, the diversion valve comprising a valve sleeve and a valve core; one end of the valve sleeve has a glue inlet connected to the glue inlet valve, and the other end of the valve sleeve has a valve core drive assembly that drives the valve core to reciprocate linearly within the valve sleeve; several application heads are evenly distributed along the axial direction of the valve sleeve; the outer wall of the valve core has a main diversion groove and several diversion branch grooves arranged in parallel at intervals, the groove port of the main diversion groove is connected to the glue inlet, each diversion branch groove is connected to the main diversion groove, and each diversion branch groove corresponds to a specific application head; when the valve core drive assembly drives the valve core to reciprocate, the positional relationship between the diversion branch groove and the application head switches between two states: aligned connection / misaligned closure.

[0004] The beneficial effects of this invention are that during glue application, the diversion branch channel and the glue application head are in a aligned and connected state. The glue enters the valve sleeve from the glue inlet and flows out of the valve sleeve sequentially along the main diversion channel, the branch channel, and the glue application head, applying the glue to the product that needs to be glued. When glue application stops, the diversion branch channel and the glue application head are in a staggered and closed state, effectively preventing residual glue from dripping from the valve sleeve, the main diversion channel, and the branch channel at the rear end of the glue inlet valve.

[0005] In one embodiment, when the valve core drive assembly moves the valve core toward the glue inlet, the valve core end face closes the glue inlet. Furthermore, the glue inlet is provided with an elastic sealing sleeve. Its function is that, as the valve core moves toward the glue inlet and enters the misaligned closed state, the valve core end face abuts against, compresses, and seals the elastic sealing sleeve, preventing glue from the incoming end from continuing to enter the valve cavity and causing glue dripping.

[0006] In one embodiment, the diversion valve is equipped with a cleaning medium injection mechanism. Further, the cleaning medium injection mechanism is structured as follows: the glue inlet valve and the diversion valve are connected to a cleaning valve via a three-way valve, and the cleaning valve is connected to a cleaning medium supply assembly. In situations such as equipment shutdown or blockage, a cleaning medium (such as water or solvent) is injected. The cleaning medium enters the valve chamber from the glue inlet, cleans the valve chamber and valve body, and then exits from the glue applicator head.

[0007] In one embodiment, the diversion valve is equipped with a residual glue extraction mechanism. Further, the residual glue extraction mechanism includes a glue storage cylinder and a piston operating within the storage cylinder. The storage cylinder communicates with the inner cavity of the valve sleeve, and the piston is equipped with a driving element. When the glue application device is closed, the driving element drives the piston to extract residual glue from the inner cavity of the valve sleeve and store it in the storage cylinder, emptying the glue in the valve sleeve to prevent dripping. When reopened, the driving element drives the piston to move in the opposite direction, re-injecting the extracted glue into the inner cavity of the valve sleeve.

[0008] In one embodiment, the main diversion channel includes two parallel channels, one end of each channel near the glue outlet is open and connected to the glue outlet, and the other ends of the two channels are connected to each other.

[0009] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time.

[0010] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0011] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0012] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0013] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0014] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0015] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the external structure of an embodiment;

[0017] Figure 2 This is a cross-sectional structural diagram of the valve sleeve and valve core in an embodiment.

[0018] Figure 3 This is a schematic diagram of the valve core structure;

[0019] Figure 4 This is a schematic diagram of the residual glue extraction mechanism. Detailed Implementation

[0020] See appendix Figure 1-4 This illustrates a specific structure of the present invention. The glue-applying device includes a glue inlet valve 1, which is connected to a pressurized glue storage device (not shown in the figure) via a front-end pipe 101. A diversion valve 2 is provided at the rear end of the glue inlet valve 1. The diversion valve 2 includes a cylindrical valve sleeve 21 and a valve core 22, with the valve core 22 nested within the inner cavity of the valve sleeve 21.

[0021] One end of the valve sleeve 21 is provided with an inlet 211 that connects to the glue inlet valve 1, and the other end of the valve sleeve 21 is provided with a valve core drive assembly—valve core cylinder 221—that drives the valve core 22 to reciprocate linearly in the inner cavity of the valve sleeve 21.

[0022] Twenty-two glue application heads 212 are evenly distributed along the axial direction of the valve sleeve 21 on the sleeve wall. The glue in the inner cavity of the valve sleeve 21 flows out from the glue application head 212. The shorter the glue channel length in the glue application head 212, the better, for example, it can be controlled to be about 1 to 2 mm.

[0023] The outer wall of the valve core 22 is provided with a main diversion groove 222 and twenty-two diversion branch grooves 223 arranged at intervals. Each branch groove 223 is connected to the main diversion groove 222.

[0024] The length of the main diversion channel 222 can be parallel to the axial direction of the valve core 22. The channel port 224 of the main diversion channel 222 is connected to the glue inlet 211 through the inner cavity of the valve sleeve 21. In the example, the main diversion channel 222 includes two parallel channels. The channel ports 224 of the two channels near the glue outlet 211 are open and connected to the glue outlet 211. The other ends of the two channels are connected to each other through a diversion branch channel 223 to form a better diversion effect.

[0025] Each branch channel 223 is configured to correspond to each applicator head 212. When the valve core cylinder 221 drives the valve core 22 to reciprocate, the positional relationship between each branch channel 223 and the corresponding applicator head 212 switches between two states: aligned connection and misaligned closure. Figure 2 During glue application, the valve core cylinder 221 drives the valve core 22 to move to the right, so that the diversion branch groove 223 and the corresponding glue application head 212 are in a aligned and connected state. The glue enters the inner cavity of the valve sleeve 21 from the glue inlet 211, and flows out of the valve sleeve 22 in sequence along the groove port 224, the main diversion groove 222, the diversion branch groove 223, and the glue application head 212, and is applied to the product that needs glue application. When glue application stops, the valve core cylinder 221 drives the valve core 22 to reset to the left, so that the arc surface of the interval part of the diversion branch groove 223 blocks the glue application head 212. The diversion branch groove 223 and the corresponding glue application head 212 are in a misaligned closed state, effectively preventing the dripping of residual glue in the valve sleeve 21, the main diversion groove 222, and the diversion branch groove 223 at the rear end of the glue inlet valve 1.

[0026] In the example, when the valve core cylinder 221 drives the valve core 22 to move to the left (i.e., towards the glue inlet 211), the glue inlet valve 1 closes, and the end face of the valve core 22 seals the glue inlet 211. In this example, the glue inlet 211 is equipped with an elastic sealing sleeve 3. Its function is that, as the valve core 22 moves to the left into the offset closed state, the end face of the valve core 22 abuts against, compresses, and seals the elastic sealing sleeve 3, preventing glue from the incoming material end from continuing to enter the inner cavity of the valve sleeve 21 and causing glue to drip. With the elastic sealing sleeve 3, closing the glue inlet valve 1 can also achieve the effect of sealing the glue inlet 211.

[0027] In the example, the diversion valve 2 is equipped with a cleaning medium injection mechanism. The structure of the cleaning medium injection mechanism in the example is as follows: the glue inlet valve 1 and the diversion valve 2 are connected to the cleaning valve 402 via a tee 401. The cleaning valve 402 is connected to the cleaning medium supply assembly (not shown in the figure) via a cleaning pipe 403. In scenarios such as when the glue applicator stops working or becomes blocked, the glue inlet valve 1 is closed, the cleaning valve 402 is opened, and the cleaning medium (such as water or solvent) is injected. The cleaning medium enters the inner cavity of the valve sleeve 21 from the glue inlet 211, cleans the inner cavity of the valve sleeve 21 and the valve body 22, and then exits from the glue applicator head 212.

[0028] In this example, the diversion valve 2 is equipped with a residual glue extraction mechanism. The residual glue extraction mechanism includes a glue storage cylinder 501 and a piston 502 operating within the storage cylinder 501. The storage cylinder 501 is connected to the inner cavity of the valve sleeve 21 via an elbow 503. The piston 502 is equipped with a driving component—a extraction cylinder 504. When the glue application device is closed, the extraction cylinder 504 drives the piston 502 to extract residual glue from the inner cavity of the valve sleeve 21 and store it in the storage cylinder 501, emptying the glue in the valve sleeve 21 to prevent dripping. When the glue application device is reopened, the extraction cylinder 504 drives the piston 502 to move in the opposite direction, re-injecting the extracted glue into the inner cavity of the valve sleeve 21.

[0029] In the example, both the glue inlet valve 1 and the cleaning valve 402 can be solenoid valves, such as AirTAC oil-water pneumatic solenoid valves, models such as 2W150-15, 2W15015B, 2W15015A, etc.

[0030] The embodiments of the present invention disclosed above are merely illustrative of the present invention. The embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific implementations described. Obviously, many modifications and variations can be made based on the content of this specification. This specification selects and describes these embodiments in detail with reference to the accompanying drawings to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present invention. Therefore, the present invention is limited only to the claims and their full scope and equivalents, and not to the specific embodiments disclosed.

Claims

1. A glue-applying device, comprising a glue inlet valve, characterized in that, The rear end of the glue inlet valve is equipped with a diversion valve, which includes a valve sleeve and a valve core. One end of the valve sleeve is equipped with a glue inlet that connects to the glue inlet valve, and the other end of the valve sleeve is equipped with a valve core drive assembly that drives the valve core to reciprocate linearly within the valve sleeve. Several application heads are evenly distributed along the axial direction of the valve sleeve. The outer wall of the valve core is equipped with a main diversion groove and several diversion branch grooves arranged in parallel at intervals. The groove port of the main diversion groove connects to the glue inlet, and each diversion branch groove connects to the main diversion groove. Each diversion branch groove is set corresponding to each application head. When the valve core drive assembly drives the valve core to reciprocate, the positional relationship between the diversion branch groove and the application head switches between two states: aligned connection / misaligned closure.

2. The adhesive coating apparatus as described in claim 1, characterized in that, When the valve core drive assembly drives the valve core to move toward the glue inlet, the valve core end face closes the glue inlet.

3. The adhesive coating apparatus as described in claim 2, characterized in that, The glue inlet is equipped with an elastic sealing sleeve.

4. The adhesive coating apparatus as described in claim 1, characterized in that, The diversion valve is equipped with a cleaning medium injection mechanism.

5. The adhesive coating apparatus as described in claim 4, characterized in that, The structure of the cleaning medium injection mechanism is as follows: the glue inlet valve and the diversion valve are connected to the cleaning valve through a three-way valve, and the cleaning valve is connected to the cleaning medium supply assembly.

6. The coating apparatus as described in claim 1, characterized in that, The diversion valve is equipped with a residual glue extraction mechanism.

7. The adhesive coating apparatus as described in claim 6, characterized in that, The residual glue extraction mechanism includes a glue storage cylinder and a piston that runs inside the glue storage cylinder. The glue storage cylinder is connected to the inner cavity of the valve sleeve, and the piston is equipped with a driving component.

8. The coating apparatus as described in claim 1, characterized in that, The main diversion channel consists of two parallel channels. One end of each channel is open and connected to the outlet, while the other ends of the two channels are connected to each other.

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