Dispensing apparatus and dispensing apparatus having the same

Abstract

This application provides a dispensing device and a dispensing apparatus having the same. The dispensing device includes: a dispensing tube with an outlet at one end; an extrusion piston movably disposed within the cavity of the dispensing tube, dividing the cavity into a first pressure chamber and a glue chamber, the glue chamber being connected to the outlet; a pressure regulating component for pressurizing or depressurizing the first pressure chamber to drive the extrusion piston within the cavity of the dispensing tube; and a back suction component located at the end of the dispensing tube near the outlet and connected to the glue chamber. When the pressure regulating component depressurizes the first pressure chamber, the back suction component simultaneously depressurizes the glue chamber. This application regulates the air pressure in the first pressure chamber through the pressure regulating component, reducing the gas pressure in the first pressure chamber, and reduces the glue pressure in the glue chamber through the back suction component, effectively preventing glue leakage from the outlet and achieving precise dispensing.

Description

Technical Field

[0001] This application relates to the field of dispensing technology, and in particular to a dispensing apparatus and a dispensing device having the same. Background Technology

[0002] A dispensing machine, also known as a glue applicator, glue dripper, glue applicator, or glue dispensing machine, is a machine specifically designed to control fluids and apply them dropwise or in the form of glue onto the surface or interior of a product.

[0003] In related technologies, the dispensing device is the core working component of a dispensing machine. The dispensing nozzle of the device is prone to leakage or dripping of adhesive, thus affecting the accuracy of the product during production. Existing dispensing devices have complex dispensing volume control structures and high costs. Therefore, there is an urgent need for an improved dispensing device. Utility Model Content

[0004] This application provides a dispensing device and a dispensing equipment having the same, which can improve the accuracy of dispensing volume and achieve precise quantitative dispensing.

[0005] In a first aspect, this application provides a dispensing device, comprising: a dispensing tube having an outlet at one end; an extrusion piston movably disposed within the cavity of the dispensing tube, dividing the cavity into a first pressure chamber and an adhesive chamber, the adhesive chamber being connected to the outlet; a pressure regulating assembly for pressurizing or depressurizing the first pressure chamber to drive the extrusion piston to move within the cavity of the dispensing tube; and a back suction assembly located at the end of the dispensing tube near the outlet and connected to the adhesive chamber; wherein when the pressure regulating assembly depressurizes the first pressure chamber, the back suction assembly simultaneously depressurizes the adhesive chamber.

[0006] According to the dispensing apparatus of this application embodiment, a back-suction component is provided on the dispensing tube. Furthermore, a pressure regulating component is used to regulate the gas pressure in the first pressure chamber. In this way, on the one hand, the pressure regulating component can conveniently increase the pressure in the first pressure chamber to facilitate the extrusion piston to quantitatively extrude the adhesive, or depressurize the first pressure chamber to reduce the pressure of the extrusion piston on the adhesive chamber; on the other hand, after the extruded adhesive amount reaches the target, the back-suction component can also back-suction the adhesive in the adhesive chamber, further reducing the pressure of the adhesive in the adhesive chamber, which is beneficial for achieving precise and efficient dispensing.

[0007] In one possible implementation of the first aspect of this application, the back-suction assembly includes a back-suction tube and a back-suction piston. The back-suction piston is movably disposed within the inner cavity of the back-suction tube, dividing the inner cavity of the back-suction tube into a second pressure chamber and a reserve chamber. The back-suction assembly further includes an abutment protrusion and an elastic element. The abutment protrusion is disposed on the inner wall of the second pressure chamber and spaced apart from the back-suction piston. Both ends of the elastic element are respectively connected to the abutment protrusion and the back-suction piston. The reserve chamber communicates with the rubber compound chamber. The pressure regulating assembly can regulate the pressure in the first pressure chamber and / or the second pressure chamber.

[0008] In one possible implementation of the first aspect of this application, the suction tube is screwed to the dispensing tube.

[0009] In one possible implementation of the first aspect of this application, an annular limiting member is provided on the inner wall of the outlet of the storage cavity, and the suction piston can abut against the annular limiting member.

[0010] In one possible implementation of the first aspect of this application, the pressure regulating assembly includes an air pump, a first pressure control tube group, and a second pressure control tube group. The first pressure control tube group is connected to the first pressure chamber and the output end of the air pump, respectively; the second pressure control tube group is connected to the second pressure chamber and the output end of the air pump, respectively.

[0011] In one possible implementation of the first aspect of this application, a sealing cap is provided at the other end of the dispensing tube, and the sealing cap is detachably connected to the adhesive tube; the first pressure control tube group passes through the sealing cap to connect the first pressure chamber and the output end of the air pump.

[0012] In another possible implementation of the first aspect of this application, the back suction assembly includes a connecting pipe, a switching valve, and a negative pressure chamber, wherein the switching valve is disposed on the connecting pipe, and both ends of the connecting pipe are respectively connected to the negative pressure chamber and the adhesive chamber.

[0013] In one possible implementation of the first aspect of this application, a discharge port is provided at the bottom end of the negative pressure chamber.

[0014] In one possible implementation of the first aspect of this application, the dispensing tube is further provided with an elastic leak-proof component, which surrounds the dispensing port.

[0015] Secondly, this application provides a dispensing device, which includes a dispensing device body and a dispensing apparatus. The dispensing apparatus is detachably mounted on the dispensing device body, and the dispensing device body is used to control the dispensing apparatus to perform dispensing.

[0016] The technical effects of the second aspect of this application can be referred to the technical effects of the first aspect of this application, and will not be repeated here. Attached Figure Description

[0017] Figure 1 A perspective view of the dispensing apparatus provided in the embodiments of this application;

[0018] Figure 2 A cross-sectional view of the dispensing apparatus provided in an embodiment of this application;

[0019] Figure 3 According to Figure 2 An enlarged view of the part circled at point A of the dispensing device shown;

[0020] Figure 4 According to Figure 2 An enlarged view of the part circled at point B of the dispensing device shown;

[0021] Figure 5 A cross-sectional view of a dispensing apparatus provided in another embodiment of this application.

[0022] Figure label:

[0023] Dispensing device 100;

[0024] Dispensing tube 1; dispensing port 11; sealing assembly 12; first pressure chamber 13; adhesive chamber 14; sealing cap 15; elastic leak-proof component 16; extrusion piston 2; pressure regulating assembly 3; first pressure control tube assembly 31; second pressure control tube assembly 32; back suction assembly 4; back suction tube 41; back suction piston 42; contact protrusion 43; elastic component 44; second pressure chamber 45; storage chamber 46; annular limiting component 47; connecting tube 48; negative pressure chamber 49; first direction F; second direction H. Detailed Implementation

[0025] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0026] In this application, the accompanying drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features.

[0027] Unless otherwise stated, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items. The singular forms "a," "the," and "the" as used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0028] In the description of this application, it should be understood that 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 technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified. In the description of this application, "several" means one or more, unless otherwise explicitly specified.

[0029] In the description of this application, the terms “length”, “width”, “thickness”, “inner”, “outer”, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this application and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. In other words, they should not be construed as limitations on this application.

[0030] In the description of this application, unless otherwise expressly defined, the terms "installation," "connection," "linking," "fixing," "setting," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] In the description of this application, unless otherwise expressly defined, the terms "above," "over," "on top of," "below," "below," "under," or "below" for "first feature over second feature" can refer to the first and second features being in direct contact, or to the first and second features being in indirect contact through an intermediate medium. Furthermore, "above," "below," and "over" for "first feature over second feature" can mean the first feature is directly above or diagonally above the second feature, or simply indicates that the horizontal level of the first feature is higher than the horizontal level of the second feature. Similarly, "below," "below," and "below" for "first feature over second feature" can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the horizontal level of the first feature is lower than the horizontal level of the second feature.

[0032] In related technologies, dispensing equipment includes the dispensing equipment body and the dispensing device.

[0033] The dispensing equipment includes a cylinder mounting plate, a drive cylinder mounted on the cylinder mounting plate, and a clamping component located at the output end of the drive cylinder. The clamping component is used to clamp the dispensing mounting connection plate and the dispensing support plate. The dispensing device is moved by the cylinder drive.

[0034] The dispensing device includes a dispensing tube and a material extrusion mechanism, wherein the material extrusion mechanism is used to extrude the material from the dispensing tube.

[0035] When the dispensing equipment is working, the clamping component holds the dispensing tube, and driven by the cylinder, it moves the dispensing tube closer to the material to be dispensed. Then, the adhesive extrusion mechanism expels the adhesive from the dispensing tube onto the material, thus completing the dispensing process.

[0036] The above-mentioned dispensing device has the following disadvantages:

[0037] 1. Inaccurate control of the dispensing amount during the dispensing process wastes production costs.

[0038] 2. After dispensing, glue may leak or drip at the dispensing nozzle, affecting product precision during production and wasting production costs.

[0039] 3. Existing precision dispensing equipment is too expensive.

[0040] Based on this, in order to solve the aforementioned technical problems, this application provides a dispensing device, in which a back-suction component is provided on the dispensing tube. Furthermore, a pressure regulating component is used to regulate the gas pressure in the first pressure chamber. In this way, on the one hand, the pressure regulating component can conveniently control the gas pressure in the first pressure chamber, allowing for the metered extrusion of adhesive by the extrusion piston; on the other hand, the back-suction component can also back-suction or depressurize the adhesive in the adhesive chamber after the extruded amount reaches the target, which helps reduce the pressure of the adhesive in the adhesive chamber and facilitates precise and efficient dispensing.

[0041] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0042] This application provides a dispensing device. This dispensing device includes, but is not limited to, equipment that uses a cylinder to drive the dispensing device for dispensing.

[0043] The dispensing equipment according to the embodiments of this application may include: a dispensing equipment body and a dispensing device.

[0044] The dispensing device is detachably connected to the main body of the dispensing equipment. This allows for easy assembly or connection of the main body of the dispensing equipment with different dispensing devices.

[0045] For example, the detachable connection between the dispensing device and the dispensing equipment body includes, but is not limited to, snap-fit ​​or clamping.

[0046] The specific structure of the dispensing equipment is well known to those skilled in the art and will not be described in detail here.

[0047] The structure of the dispensing device of this application will be described in detail below.

[0048] Please see Figure 1 and Figure 2 The dispensing device 100 of this application embodiment may include: dispensing tube 1, extrusion piston 2, pressure regulating component 3 and back suction component 4;

[0049] Please refer to further reading Figure 1 and combined Figure 3 The dispensing tube 1 includes dispensing ports 11 and sealing components 12 spaced apart along a first direction F. For example, in... Figure 2 In the specific example shown, the first direction F can be the length direction of the dispensing tube 1. In other embodiments, the first direction F can also be the width direction of the dispensing tube 1.

[0050] The material of the dispensing tube 1 includes, but is not limited to, plastic and metal. The dispensing port 11 is located at one end of the dispensing tube 1, and the sealing assembly 12 is located at the other end of the dispensing tube 1.

[0051] In this embodiment, the sealing component 12 and the dispensing port 11 are respectively disposed at both ends of the dispensing tube 1, so that the middle part of the dispensing tube 1 has sufficient space for dispensing adhesive, thereby improving the adhesive capacity and dispensing efficiency.

[0052] Please continue reading. Figure 1 and Figure 2 The dispensing tube 1 is a hollow cylinder. The inner wall of the hollow space of the dispensing tube 1 forms the cavity of the dispensing tube 1. The extrusion piston 2 is movably disposed in the cavity of the dispensing tube 1, and the extrusion piston 2 divides the cavity of the dispensing tube 1 into a first pressure cavity 13 and an adhesive cavity 14. The adhesive cavity 14 is connected to the dispensing port 11 and is used to store adhesive.

[0053] The volumes of the first pressure chamber 13 and the adhesive chamber 14 change with the position of the extrusion piston 2 within the dispensing tube 1. When the extrusion piston 2 slides along the first direction F toward the outlet 11 within the dispensing tube 1, the volume of the first pressure chamber 13 increases, the volume of the adhesive chamber 14 decreases, and the adhesive in the adhesive chamber 14 is extruded.

[0054] Please continue reading. Figure 1 and combined Figure 2 and Figure 3 The back-suction assembly 4 includes a back-suction tube 41 and a back-suction piston 42. The back-suction piston 42 is movably disposed within the inner cavity of the back-suction tube 41, dividing the inner cavity of the back-suction tube 41 into a second pressure chamber 45 and a storage chamber 46. The back-suction assembly 4 also includes an abutment protrusion 43 and an elastic element 44. The abutment protrusion 43 is disposed on the inner wall of the second pressure chamber 45 in the second direction H, spaced apart from the back-suction piston 42. The second direction H is perpendicular to the first direction F. The two ends of the elastic element 44 are respectively connected to the abutment protrusion 43 and the back-suction piston 42. The storage chamber 46 is connected to the adhesive chamber 14. The pressure regulating assembly 3 can regulate the pressure in the first pressure chamber 13 and / or the second pressure chamber 45 respectively.

[0055] In the embodiment of this application, when it is necessary to squeeze the adhesive in the adhesive cavity 14 out of the adhesive outlet 11, the pressure regulating component 3 pressurizes the first pressure cavity 13 and the second pressure cavity 45 respectively. The pressure in the first pressure cavity 13 increases, thereby pushing the extrusion piston 2 to move closer to the adhesive outlet 11 and squeeze out the adhesive. At the same time, the pressure regulating component 3 continues to pressurize the second pressure cavity 45, causing the suction piston 42 to move away from the contact protrusion 43 along the second direction H until the suction piston 42 compresses the space in the storage cavity 46 to the minimum. At this time, the elastic element 44 is in a stretched state and accumulates elastic potential energy. The space in the second pressure cavity 45 is compressed to the minimum, which can prevent the adhesive from flowing into the second pressure cavity 45 and causing the adhesive cavity 14 to fail to maintain pressure or seal. Once the required amount of rubber extrusion is reached, the pressure regulating component 3 releases or reduces pressure in the first pressure chamber 13, or stops increasing pressure, thereby stopping the extrusion piston 2 from continuing to move towards the outlet 11 and preventing the rubber material in the rubber chamber 14 from being extruded further. At the same time, the pressure regulating component 3 releases or reduces pressure in the second pressure chamber 45. When the pressure is reduced, the elastic element 44 releases the stored elastic potential energy and generates elasticity. The elastic energy released by the elastic element 44 resists the force exerted by the second pressure chamber 45 on the suction piston 42 and further pulls the suction piston 42 to move along the second direction H toward the direction of the contact protrusion 43. The movement of the suction piston 42 expands the space of the storage chamber 46 and reduces the pressure in the storage chamber 46. Under the action of liquid pressure, the rubber material in the rubber chamber 14 flows into the depressurized storage chamber 46. In this way, the pressure of the adhesive in the adhesive chamber 14 can be released, avoiding the problem of excessive pressure of the adhesive in the adhesive chamber 14 overflowing from the dispensing port 11 after dispensing, which would cause adhesive waste or inaccurate control of the dispensing amount.

[0056] In some embodiments of this application, the back suction tube 41 is threadedly connected to the dispensing tube 1. This allows the back suction tube 41 to be easily removed from the dispensing tube 1 by rotation, facilitating maintenance or cleaning of the back suction tube 41. It also avoids color or material mixing problems caused by using different adhesives.

[0057] Please continue reading. Figure 3In some embodiments of this application, an annular limiting member 47 is provided on the inner wall of the outlet of the storage chamber 46. The annular limiting member 47 protrudes inward from the inner wall of the storage chamber 46 and can abut against the suction piston 42. In this way, the pressure regulating component 3 pressurizes the second pressure chamber 45, and the second pressure chamber 45 pushes the suction piston 42 until the suction piston 42 abuts against the annular limiting member 47. At the same time, the elastic member 44 located between the suction piston 42 and the abutting protrusion 43 is stretched, and the pulling force of the elastic member 44 on the suction piston 42 is balanced with the pressure of the rubber in the rubber chamber 14 and the pushing force of the second pressure chamber 45 on the suction piston 42, so that the suction piston 42 is kept in the state of being abutted by the annular limiting member 47. By setting the annular limiting member 47, the back suction piston 42 can be prevented from being pushed into the rubber cavity 14 under the pressure of the second pressure chamber 45, thus affecting the airtightness of the second pressure chamber 45 or the rubber cavity 14. Furthermore, when the extrusion amount of the rubber material reaches the predetermined value, the pressure regulating component 3 stops pressurizing the second pressure chamber 45 and releases the pressure in the second pressure chamber 45. The balance between the pulling force of the elastic element 44 on the suction piston 42 and the pressure of the rubber material in the rubber material chamber 14 and the thrust of the second pressure chamber 45 on the suction piston 42 is broken. The rebound force of the elastic element 44 on the suction piston 42 and the thrust of the rubber material chamber 14 on the suction piston 42 are greater than the thrust of the second pressure chamber 45 on the suction piston 42. As a result, the suction piston 42 moves towards the contact protrusion 43 along the second direction H, thereby increasing the space and reducing the pressure in the storage chamber 46. Part of the rubber material in the rubber material chamber 14 is sucked into the storage chamber 46 for storage, thereby reducing the pressure of the rubber material in the rubber material chamber 14 and avoiding the problem of excessive pressure of the rubber material in the rubber material chamber 14 causing the rubber material to continue to overflow from the outlet 11. This achieves precise control of the rubber material and refined production.

[0058] Please continue reading. Figure 2 The pressure regulating assembly 3 includes an air pump (not shown in the figure), a first pressure control tube group 31 and a second pressure control tube group 32. The first pressure control tube group 31 is used to connect the first pressure chamber 13, the gas output end of the air pump and the gas input end of the air pump. The second pressure control tube group 32 is used to connect the second pressure chamber 45, the gas output end of the air pump and the gas input end of the air pump.

[0059] In the pressure regulating component 3 of this application embodiment, the pressure regulating component 3 further includes a first solenoid valve and a second solenoid valve. The first solenoid valve controls the on / off state of the first pressure control tube group 31, thereby connecting the first pressure chamber 13 only to the gas output terminal of the air pump, or connecting the first pressure chamber 13 only to the gas input terminal of the air pump, or simultaneously disconnecting the first pressure chamber 13 from both the gas output and gas input terminals of the air pump. The second solenoid valve controls the on / off state of the second pressure control tube group 32, thereby connecting the second pressure chamber 45 only to the gas output terminal of the air pump, or connecting the second pressure chamber 45 only to the gas input terminal of the air pump, or simultaneously disconnecting the second pressure chamber 45 from both the gas output and gas input terminals of the air pump.

[0060] In this way, when it is necessary to extrude the rubber material in the rubber material chamber 14, the air pump works, the first solenoid valve controls the first pressure control tube group 31 to connect the first pressure chamber 13 to the gas output end of the air pump, and the second solenoid valve controls the second pressure control tube group 32 to connect the second pressure chamber 45 to the gas output end of the air pump. The air pump fills the first pressure chamber 13 and the second pressure chamber 45 with air. The air pressure in the first pressure chamber 13 and the second pressure chamber 45 increases with the increase of the amount of gas, thereby pushing the extrusion piston 2 to move towards the rubber outlet 11 and extruding the rubber material. It also pushes the back suction piston 42 to move away from the contact protrusion 43 along the second direction H. The elastic element 44 is stretched and accumulates elastic potential energy until the back suction piston 42 compresses the space in the storage chamber 46 to the minimum and contacts the annular limiting element 47, thereby achieving precise and efficient extrusion of the rubber material. When the extruded amount of adhesive reaches the target, the first solenoid valve controls the first pressure control tube group 31 to connect the first pressure chamber 13 to the gas input end of the air pump, and the second solenoid valve controls the second pressure control tube group 32 to connect the second pressure chamber 45 to the gas input end of the air pump. The air pump depressurizes the first pressure chamber 13 and the second pressure chamber 45 respectively. The air pressure in the first pressure chamber 13 and the second pressure chamber 45 decreases as the amount of gas decreases, and the extrusion piston 2 stops being pushed to extrude adhesive. Furthermore, due to the decrease in air pressure in the second pressure chamber 45, the elastic element 44 releases the stored elastic potential energy and generates elasticity. The elastic energy released by the elastic element 44 resists the force of the second pressure chamber 45 acting on the suction piston 42 and accelerates the suction piston 42 to move along the second direction H towards the contact protrusion 43. The pressure in the storage chamber 46 is further reduced, and the adhesive in the adhesive chamber 14 flows into the depressurized storage chamber 46 under the action of liquid pressure. In this way, dripping and precise adhesive control can be achieved with a single air pump, realizing cost reduction and efficiency improvement. Furthermore, since the storage chamber 46 is located close to the outlet 11, when the air pressure in the storage chamber 46 is lower than the rubber pressure in the rubber chamber 14, it can quickly suck back the rubber material in the rubber chamber 14 located near the outlet 11. This can effectively and quickly prevent the rubber material above the outlet 11 from being squeezed out under the pressure of the rubber material in the rubber chamber 14 or by gravity, resulting in a significant back-suction effect.

[0061] In some embodiments of this application, the pressure regulating assembly 3 further includes a pressure detector, which can be used to detect the pressure in the second pressure chamber 45 and the rubber chamber 14. Thus, when the pressure detector detects that the pressure in the second pressure chamber 45 and the pressure in the rubber chamber 14 reach a preset value, the connection between the second pressure chamber 45 and the gas output terminal of the air pump can be disconnected via the second solenoid valve to prevent the air pressure in the second pressure chamber 45 from increasing excessively. When the elastic element 44 depressurizes the second pressure chamber 45, the elastic force of the elastic element 44 cannot promptly overcome the pressure in the second pressure chamber 45 to pull the suction piston 42.

[0062] Please continue reading. Figure 2 and Figure 1The sealing assembly 12 is provided with a sealing cap 15, and along the first direction F, the dispensing port 11 is located at the other end of the dispensing tube 1. The sealing cap 15 is detachably connected to the dispensing tube 1. The first pressure control tube assembly 31 passes through the sealing cap 15 to connect the first pressure chamber 13 and the output end of the air pump. In this way, the airtightness is improved, and the sealing cap 15 is easy to disassemble, making it convenient to clean and maintain the dispensing tube 1.

[0063] Please continue reading. Figure 5 In another possible embodiment of this application, the back suction assembly 4 includes a connecting pipe 48, a switching valve (not shown in the figure) and a negative pressure chamber 49. The switching valve is disposed on the connecting pipe 48, and the two ends of the connecting pipe 48 are respectively connected to the negative pressure chamber 49 and the adhesive chamber 14.

[0064] In this way, when it is necessary to extrude the adhesive, the switch valve controls the connecting pipe 48 to disconnect the connection between the negative pressure chamber 49 and the adhesive chamber 14. The pressure regulating component 3 increases the gas pressure in the first pressure chamber 13 to control the extrusion of the adhesive. When the extruded amount of adhesive reaches the target, the pressure regulating component 3 stops increasing the pressure in the first pressure chamber 13 and controls the switch valve to open, thereby connecting the connecting pipe 48 to the negative pressure chamber 49 and the adhesive chamber 14. Since the gas pressure in the negative pressure chamber 49 is less than 0 Pa, and the adhesive pressure in the adhesive chamber 14 is much greater than 0 Pa, the adhesive is drawn into the negative pressure chamber 49 under its own pressure, thus preventing the adhesive from leaking from the outlet 11 after dispensing.

[0065] For example, a discharge port (not shown in the figure) is provided at the bottom of the negative pressure chamber 49. The adhesive material in the negative pressure chamber 49 is extracted through the discharge port for reuse, or after the adhesive material is extracted, the gas in the negative pressure chamber 49 is continued to be extracted so that the negative pressure chamber 49 is kept in a negative pressure state.

[0066] Please refer to section 4. In some embodiments of this application, the dispensing tube 1 is further provided with an elastic leak-proof component 16, which surrounds the dispensing port 11. The projection of the elastic leak-proof component 16 along the second direction H is conical, and the diameter of the end of the elastic leak-proof component 16 near the sealing cap 15 is larger than the diameter of its other end. The elastic leak-proof component 16 can be made of elastic materials such as rubber.

[0067] In this way, the elastic leak-proof component 16 is elastic. When it is connected to the dispensing tube 1, the gap between the elastic leak-proof component 16 and the dispensing tube 1 can be filled by the elastic leak-proof component 16, thereby preventing glue leakage at the connection between the elastic leak-proof component 16 and the dispensing tube 1. When the glue pressure in the glue chamber 14 is applied, the glue expands to the minimum diameter of the elastic leak-proof component 16 and flows out from there, thereby achieving dispensing. Furthermore, the diameter of the minimum diameter of the elastic leak-proof component 16 is close to zero in its natural state, which can prevent glue leakage when dispensing stops, further achieving leak-free glue at low cost and high efficiency.

[0068] Please continue reading. Figure 2 In some embodiments of this application, an extrusion limiting member is provided above the inner wall of the connection between the rubber cavity 14 and the storage cavity 46. Along the first direction F, the sealing cap 15, the extrusion piston 2, the extrusion limiting member, and the storage cavity 46 are arranged sequentially. The extrusion limiting member can abut against the extrusion piston 2. In this way, by providing the extrusion limiting member, the extrusion piston 2 is prevented from moving to the connection between the rubber cavity 14 and the storage cavity 46, and the first pressure cavity 13 is prevented from communicating with the storage cavity 46, thereby improving airtightness.

[0069] Please continue reading. Figure 5 In some other embodiments of this application, the connection between the storage chamber 46 and the rubber chamber 14 can be located on the conical surface of the rubber outlet 11. In this way, the extrusion piston 2 is restricted by the inner wall of the inner cavity of the rubber tube 1, and no matter how it moves, it will not connect the first pressure chamber 13 with the storage chamber 46, and the structure of the extrusion device 100 is simplified.

[0070] It is understood that in the various embodiments of this application, the sequence number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0071] It is understood that the various implementation methods described in this application can be implemented individually or in combination, and the embodiments of this application are not limited in this respect.

[0072] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the aforementioned method implementations, and will not be repeated here.

[0073] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A dispensing device, characterized in that, include: A dispensing tube, one end of which is provided with a dispensing port; An extrusion piston is movably disposed within the cavity of the dispensing tube, dividing the cavity of the dispensing tube into a first pressure chamber and a material chamber, the material chamber being connected to the dispensing outlet; A pressure regulating component is used to pressurize or depressurize the first pressure chamber to drive the extrusion piston to move within the cavity of the dispensing tube. A back-suction assembly is located at one end of the dispensing tube near the dispensing port and communicates with the adhesive chamber; when the pressure regulating assembly depressurizes the first pressure chamber, the back-suction assembly can simultaneously depressurize the adhesive chamber.

2. The dispensing device according to claim 1, characterized in that, The back suction assembly includes a back suction tube and a back suction piston. The back suction piston is movably disposed within the inner cavity of the back suction tube and divides the inner cavity of the back suction tube into a second pressure chamber and a reserve chamber. The suction assembly further includes an abutting protrusion and an elastic element. The abutting protrusion is disposed on the inner wall of the second pressure chamber and spaced apart from the suction piston. The two ends of the elastic element are respectively connected to the abutting protrusion and the suction piston. The storage chamber is connected to the rubber material chamber; the pressure regulating component can regulate the pressure in the first pressure chamber and / or the second pressure chamber respectively.

3. The dispensing device according to claim 2, characterized in that, The suction tube is screwed to the dispensing tube.

4. The dispensing device according to claim 2, characterized in that, The inner wall at the outlet of the storage chamber is provided with an annular limiting member, and the suction piston can abut against the annular limiting member.

5. The dispensing device according to claim 2, characterized in that, The pressure regulating assembly includes an air pump, a first pressure control tube assembly, and a second pressure control tube assembly. The first pressure control tube assembly is connected to the first pressure chamber and the output end of the air pump, respectively. The second pressure control tube assembly is connected to the second pressure chamber and the output end of the air pump, respectively.

6. The dispensing device according to claim 5, characterized in that, The other end of the dispensing tube is provided with a sealing assembly, which includes a sealing cap that is detachably connected to the dispensing tube; the first pressure control tube group passes through the sealing cap to connect the first pressure chamber and the output end of the air pump.

7. The dispensing device according to claim 1, characterized in that, The back suction assembly includes a connecting pipe, a switching valve, and a negative pressure chamber. The switching valve is disposed on the connecting pipe, and the two ends of the connecting pipe are respectively connected to the negative pressure chamber and the adhesive chamber.

8. The dispensing device according to claim 7, characterized in that, A discharge port is provided at the bottom of the negative pressure chamber.

9. The dispensing device according to claim 1, characterized in that, The dispensing tube is also provided with an elastic leak-proof component, which surrounds the dispensing port.

10. A dispensing device, characterized in that, include: Main body of the dispensing equipment; and According to any one of claims 1-9, the dispensing device is detachably mounted on the dispensing equipment body, and the dispensing equipment body is used to control the dispensing device to perform dispensing.

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