Dispensing structure for quick-drying adhesive

Abstract

This application discloses a dispensing structure for quick-drying adhesive, including a liquid reservoir, a valve needle, a first sealing ring, and a second sealing ring. The liquid reservoir has a receiving cavity, in which the first and second sealing rings are disposed. The valve needle extends into the receiving cavity and passes through the first and second sealing rings sequentially. A first storage cavity for dissolving adhesive is formed between the first and second sealing rings. A second storage cavity for quick-drying adhesive is formed on the side of the second sealing ring opposite to the first sealing ring. A first dispensing port is provided at the bottom of the second storage cavity. The valve needle moves up and down to control the opening and closing of the first dispensing port. The side wall of the liquid reservoir also has a first inlet port that connects to the second storage cavity to allow quick-drying adhesive to enter. The first and second sealing rings prevent the portion of the valve needle in contact with the quick-drying adhesive from coming into contact with air. When the valve needle moves up and down, its surface continuously contacts and adheres to a trace amount of dissolving adhesive, which can dissolve the quick-drying adhesive or prevent its adhesion, thus preventing the quick-drying adhesive from accumulating and curing.

Description

Technical Field

[0001] This application relates to the technical field of dispensing equipment, and more particularly to a dispensing structure for quick-drying adhesives. Background Technology

[0002] Quick-drying adhesives (such as cyanoacrylates) are widely used in precision dispensing (especially in microelectronics and medical device assembly) due to their rapid curing properties. However, because quick-drying adhesives cure very easily after contact with air, they tend to accumulate and solidify on the surface of valve needles (impact needles), causing valve needle movement to become stuck, incomplete closure, uncontrolled dispensing volume, and even damage to the precision valve body.

[0003] Therefore, it is necessary to provide a dispensing structure for quick-drying adhesives to avoid the cumulative curing of quick-drying adhesives at the valve needle. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a dispensing structure and dispensing equipment for quick-drying adhesives, so as to avoid the cumulative curing of quick-drying adhesives at the valve needle.

[0005] According to an embodiment of this utility model, the first embodiment is provided as follows: a dispensing structure for quick-drying adhesive, including a liquid storage container, a valve needle, a first sealing ring, and a second sealing ring; the liquid storage container has a receiving cavity, the first sealing ring and the second sealing ring are disposed in the receiving cavity, the valve needle extends into the receiving cavity and passes through the first sealing ring and the second sealing ring in sequence, a first storage cavity for receiving adhesive release agent is formed between the first sealing ring and the second sealing ring, a second storage cavity for receiving quick-drying adhesive is formed on the side of the second sealing ring away from the first sealing ring, a first dispensing port is provided at the bottom of the second storage cavity, the valve needle moves up and down to control the opening and closing of the first dispensing port, and the side wall of the liquid storage container is also provided with a first inlet port communicating with the second storage cavity for quick-drying adhesive to enter.

[0006] In a preferred embodiment, the second sealing ring has an inner hole through which the valve needle passes. The inner hole includes a first hole and a second hole. The first hole is located between the second hole and the first storage cavity. A first gap is formed between the first hole and the valve needle. The desiccant in the first storage cavity diffuses into the first gap. The inner wall of the second hole is in contact with the valve needle.

[0007] In a preferred embodiment, the liquid storage container is further provided with a first liquid inlet and a sealing element, the first liquid inlet being connected to the first storage cavity, and the sealing element being detachably and sealingly connected to the first liquid inlet.

[0008] In a preferred embodiment, the liquid storage container is provided with a slot communicating with the receiving cavity, and a liquid storage accessory is detachably inserted into the slot. The liquid storage accessory, the first sealing ring, and the second sealing ring together form the first storage cavity.

[0009] In a preferred embodiment, the liquid storage fitting includes an extension extending out of the slot, and the seal is inserted into the extension and seals the first liquid inlet.

[0010] In a preferred embodiment, the inner wall of the liquid storage container at the second storage cavity gradually contracts in a direction away from the second sealing ring, and the included angle between any two adjacent surfaces of the inner wall of the liquid storage container at the second storage cavity is greater than 90°.

[0011] In a preferred embodiment, the inner walls of the second storage cavity, the first dispensing port, and the first inlet port are all provided with a smooth inert protective coating, which is a Ni-P alloy coating, a DLC coating, or a PTFE composite coating.

[0012] In a preferred embodiment, the dispensing structure for quick-drying adhesive further includes a glue cartridge and a flow guide. The bottom of the glue cartridge is provided with a second glue outlet, and the flow guide connects the second glue outlet to the first glue inlet, so that the quick-drying adhesive in the glue cartridge flows into the second storage chamber of the liquid storage container.

[0013] In a preferred embodiment, the drainage component includes a first connector, a second connector, and a fastener. The quick-drying adhesive flows sequentially from the second outlet into the second connector, the first connector, and the first inlet. The first connector includes a sleeve portion that fits onto the outer periphery of the liquid storage container. The first connector also has a connecting groove, which includes a first sidewall and a second sidewall facing each other. The first sidewall has a first connecting through hole communicating with the first inlet. The top of the second connector has a second connecting through hole communicating with the second outlet. The bottom of the second connector extends into the connecting groove. The fastener penetrates the second sidewall and abuts the second connector against the first sidewall.

[0014] In a preferred embodiment, the dispensing structure for quick-drying adhesive further includes a valve body, the valve body having a positioning ball, the outer periphery of the liquid storage container having an annular groove and a spherical groove connected to the annular groove, when the liquid storage container is installed in conjunction with the valve body, the positioning ball is moved from the annular groove into the spherical groove by rotating the liquid storage container to achieve positioning, thereby forming an axial limit on the liquid storage container.

[0015] This utility model has the following beneficial effects: In the solution of this application, the first sealing ring and the second sealing ring can prevent the part of the valve needle that contacts the quick-drying adhesive from contacting the air. When the valve needle moves up and down, its surface will continuously contact and adhere a small amount of adhesive remover. This adhesive remover can effectively dissolve the small amount of quick-drying adhesive that may adhere to the surface of the valve needle or prevent it from adhering, preventing the quick-drying adhesive from accumulating and curing and causing the valve needle to stick together. This avoids the valve needle from getting stuck or jammed, which can greatly improve the service life of the dispensing valve and reduce maintenance costs and unexpected downtime. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the dispensing structure for quick-drying adhesive according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the dispensing structure for quick-drying adhesive according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the second sealing ring according to an embodiment of the present invention; Figure 4 This is a schematic diagram illustrating the cooperation between the valve needle and the second sealing ring according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the dispensing structure for quick-drying adhesive according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the dispensing structure for quick-drying adhesive according to an embodiment of the present invention; Figure 7 This is a partial structural diagram of a dispensing structure for quick-drying adhesive according to an embodiment of the present invention.

[0017] Reference numerals: 10, liquid storage container; 11, receiving cavity; 111, first storage cavity; 112, second storage cavity; 113, first glue outlet; 114, first glue inlet; 13, slot; 14, liquid storage fitting; 141, extension; 15, annular groove; 16, spherical groove; 20, valve needle; 30, first sealing ring; 40, second sealing ring; 41, inner hole; 411, first hole; 412, second hole; 413, first gap; 50, sealing element; 60, glue tube; 70, drainage element; 71, first connecting element; 711, sleeve; 712, groove; 713, first side wall; 714, second side wall; 72, second connecting element; 73, fastener; 80, valve body; 81, positioning ball; Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solutions in this application, 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 a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0020] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or component 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 application.

[0021] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0022] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0023] Please refer to Figures 1 to 7An embodiment of this utility model provides a dispensing structure for quick-drying adhesive, including a liquid storage container 10, a valve needle 20, a first sealing ring 30, and a second sealing ring 40. The liquid storage container 10 has a receiving cavity 11, in which the first sealing ring 30 and the second sealing ring 40 are disposed. The valve needle 20 extends into the receiving cavity 11 and passes through the first sealing ring 30 and the second sealing ring 40 in sequence. A first storage cavity 111 for receiving adhesive release agent is formed between the first sealing ring 30 and the second sealing ring 40. A second storage cavity 112 for receiving quick-drying adhesive is formed on the side of the second sealing ring 40 opposite to the first sealing ring 30. A first dispensing port 113 is provided at the bottom of the second storage cavity 112. The valve needle 20 moves up and down to control the opening and closing of the first dispensing port 113. The side wall of the liquid storage container 10 also has a first inlet port 114 that communicates with the second storage cavity 112 to allow quick-drying adhesive to enter.

[0024] The adhesive remover can be used to dissolve the quick-drying adhesive and prevent it from adhering to the surface of the valve needle 20. For example, the adhesive remover can be a nitromethane solvent for cyanoacrylate adhesives, or an adhesive remover paste or oil for other types of quick-drying adhesives.

[0025] In this embodiment, the first sealing ring 30 and the second sealing ring 40 can prevent the part of the valve needle 20 that contacts the quick-drying adhesive from coming into contact with air. When the valve needle 20 moves up and down, its surface will continuously contact and adhere to a small amount of adhesive remover. This adhesive remover can effectively dissolve the small amount of quick-drying adhesive that may adhere to the surface of the valve needle 20 or prevent it from adhering, preventing the quick-drying adhesive from accumulating and solidifying, which would cause the valve needle 20 to stick together. This avoids the valve needle 20 from getting stuck or jammed, which can greatly improve the service life of the dispensing valve and reduce maintenance costs and unexpected downtime.

[0026] In a preferred embodiment, reference may be made to Figures 2-4 The second sealing ring 40 is provided with an inner hole 41 through which the valve needle 20 passes. The inner hole 41 includes a first hole portion 411 and a second hole portion 412. The first hole portion 411 is located between the second hole portion 412 and the first storage cavity 111. A first gap 413 is formed between the first hole portion 411 and the valve needle 20. The degumming agent in the first storage cavity 111 diffuses into the first gap 413. The inner wall of the second hole portion 412 is in contact with the valve needle 20.

[0027] In this embodiment, the inner wall of the second hole 412 is in contact with the valve needle 20, so the desiccant will not directly mix with the quick-drying adhesive in the second storage chamber. A first gap 413 is formed between the first hole 411 and the valve needle 20, which allows the desiccant to better form a protective layer in the first gap 413 through molecular diffusion or capillary action.

[0028] In a preferred embodiment, the liquid storage container 10 is further provided with a first liquid inlet (not shown) and a sealing member 50. The first liquid inlet is connected to the first storage cavity 111 to facilitate the injection of a degumming agent into the first storage cavity 111. The sealing member 50 is detachably and sealingly connected to the first liquid inlet to prevent air from entering the first storage cavity 111.

[0029] Preferably, the liquid storage container 10 is provided with a slot 13 communicating with the receiving cavity 11. A liquid storage accessory 14 is detachably inserted into the slot 13. The liquid storage accessory 14, the first sealing ring 30, and the second sealing ring 40 surround and form the first storage cavity 111. By providing the liquid storage accessory 14 inserted into the slot 13, the assembly of the first sealing ring 30 and the second sealing ring 40 can be better realized, and the sealing effect can be improved.

[0030] Preferably, refer to Figure 1 The two ends of the liquid storage fitting 14 extend out of the slot 13 to form an extension 141. A first liquid inlet is opened in the extension 141, and a seal 50 is inserted into the extension 141 and seals the first liquid inlet.

[0031] In a preferred embodiment, reference may be made to Figure 2 The inner wall of the liquid storage container 10 at the second storage cavity 112 gradually contracts in the direction away from the second sealing ring 40, and the included angle between any two adjacent surfaces of the inner wall of the liquid storage container 10 at the second storage cavity 112 is greater than 90°. With this setting, there are no dead corners in the inner wall of the second storage cavity 112, and the resulting resistance is small, which can reduce adhesive residue. When the dispensing is triggered, the adhesive can quickly reach the needle tip with minimal resistance, achieving dispensing at the first time, which can reduce the phenomena of adhesive breakage, stringing and sticking caused by adhesive retraction or surface curing.

[0032] In a preferred embodiment, the liquid storage container 10 may be precision machined from metal (such as stainless steel) or high-strength, chemical-resistant engineering plastics (such as PEEK, PPA). The inner walls of the second storage cavity 112, the first dispensing port 113, and the first inlet port 114 are all provided with a smooth inert protective coating, which is a Ni-P alloy coating (nickel-phosphorus alloy coating), a DLC coating (diamond-like carbon coating), or a PTFE composite coating (Teflon composite coating).

[0033] In this embodiment, the inner wall of the liquid storage container 10 may be made of metal or engineering plastic. The smooth, inert protective coating can effectively block the direct contact between the quick-drying adhesive and the inner wall of the liquid storage container 10, prevent the adhesive from denaturing, polymerizing, or corroding the flow channel due to chemical reactions, provide a smooth surface, significantly reduce adhesive adhesion, further reduce adhesive residue and flow channel cleanliness and adhesive flowability.

[0034] In a preferred embodiment, reference may be made to Figures 5-7 The dispensing structure for quick-drying adhesive also includes a glue cartridge 60 and a flow guide 70. The bottom of the glue cartridge 60 is provided with a second glue outlet (not shown in the figure). The flow guide 70 connects the second glue outlet with the first glue inlet 114 so that the quick-drying adhesive in the glue cartridge 60 flows into the second storage chamber 112 of the liquid storage container 10.

[0035] Furthermore, the drainage component 70 includes a first connector 71, a second connector 72, and a fastener 73. The quick-drying adhesive can flow sequentially from the second adhesive outlet into the second connector 72, the first connector 71, and the first adhesive inlet 114. The first connector 71 includes a sleeve portion 711, which sleeves onto the outer periphery of the liquid storage container 10. The extension portions 141 at both ends of the liquid storage accessory 14 can be placed above the sleeve portion 711 to support the liquid storage container 10 and prevent it from falling. The first connector 71 is also provided with a connecting groove 712. The connecting groove 712 includes a first sidewall 713 and a second sidewall 714 opposite to each other. The first sidewall 713 is provided with a first connecting through hole (not shown in the figure) communicating with the first glue inlet 114. The top of the second connector 72 is provided with a second connecting through hole (not shown in the figure) communicating with the second glue outlet. The bottom of the second connector 72 extends into the connecting groove 712. The fastener 73 passes through the second sidewall 714 and abuts the second connector 72 against the first sidewall 713.

[0036] In this embodiment, the glue tube 60 and the second connector 72, the first connector 71 and the second connector 72, and the liquid storage container 10 and the first connector 71 are preferably detachable connections, so that the dispensing equipment can be easily cleaned internally to avoid glue residue from hardening.

[0037] In a preferred embodiment, reference may be made to Figure 6 The dispensing structure for quick-drying adhesives also includes a valve body 80, which can be combined with... Figure 7 The valve body 80 is equipped with a positioning ball 81, and the outer periphery of the liquid storage container 10 is provided with an annular groove 15 and a spherical groove 16 connected to the annular groove 15. When the liquid storage container 10 is installed in conjunction with the valve body 80, the positioning ball 81 is positioned by rotating the liquid storage container 10 so that it slides from the annular groove 15 into the spherical groove 16. When the positioning ball 81 slides into the spherical groove 16, the surface of the positioning ball 81 will contact the arc surface of the spherical groove 16, thereby axially limiting the liquid storage container 10. This structure can realize the quick assembly and disassembly of the liquid storage container 10 and the valve body 80.

[0038] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dispensing structure for quick-drying adhesives, characterized in that, The device includes a liquid storage container, a valve needle, a first sealing ring, and a second sealing ring. The liquid storage container has a receiving cavity, in which the first and second sealing rings are disposed. The valve needle extends into the receiving cavity and passes through the first and second sealing rings in sequence. A first storage cavity for holding a desiccant is formed between the first and second sealing rings. A second storage cavity for holding quick-drying adhesive is formed on the side of the second sealing ring away from the first sealing ring. A first adhesive outlet is provided at the bottom of the second storage cavity. The valve needle moves up and down to control the opening and closing of the first adhesive outlet. The side wall of the liquid storage container also has a first adhesive inlet that communicates with the second storage cavity for quick-drying adhesive to enter.

2. The dispensing structure for quick-drying adhesive according to claim 1, characterized in that, The second sealing ring has an inner hole through which the valve needle passes. The inner hole includes a first hole and a second hole. The first hole is located between the second hole and the first storage cavity. A first gap is formed between the first hole and the valve needle. The degumming agent in the first storage cavity diffuses into the first gap. The inner wall of the second hole is in contact with the valve needle.

3. The dispensing structure for quick-drying adhesive according to claim 1, characterized in that, The liquid storage container is further provided with a first liquid inlet and a sealing element. The first liquid inlet is connected to the first storage cavity, and the sealing element is detachably and sealingly connected to the first liquid inlet.

4. The dispensing structure for quick-drying adhesive according to claim 3, characterized in that, The liquid storage container is provided with a slot communicating with the receiving cavity. A liquid storage accessory is detachably inserted into the slot. The liquid storage accessory, the first sealing ring, and the second sealing ring together form the first storage cavity.

5. The dispensing structure for quick-drying adhesive according to claim 4, characterized in that, The liquid storage fitting includes an extension extending out of the slot, and the seal is inserted into the extension and seals the first liquid inlet.

6. The dispensing structure for quick-drying adhesive according to claim 1, characterized in that, The inner wall of the liquid storage container at the second storage cavity gradually contracts in the direction away from the second sealing ring, and the included angle between any two adjacent surfaces of the inner wall of the liquid storage container at the second storage cavity is greater than 90°.

7. The dispensing structure for quick-drying adhesive according to claim 1, characterized in that, The inner walls of the second storage cavity, the first dispensing port, and the first inlet port are all provided with a smooth inert protective coating, which is a Ni-P alloy coating, a DLC coating, or a PTFE composite coating.

8. The dispensing structure for quick-drying adhesive according to claim 1, characterized in that, The dispensing structure for quick-drying adhesive further includes a glue cartridge and a flow guide. The bottom of the glue cartridge is provided with a second glue outlet, and the flow guide connects the second glue outlet to the first glue inlet so that the quick-drying adhesive in the glue cartridge flows into the second storage chamber of the liquid storage container.

9. The dispensing structure for quick-drying adhesive according to claim 8, characterized in that, The drainage component includes a first connector, a second connector, and a fastener. Quick-drying adhesive flows sequentially from the second outlet into the second connector, the first connector, and the first inlet. The first connector includes a sleeve portion that fits onto the outer periphery of the liquid storage container. The first connector also has a connecting groove, which includes a first sidewall and a second sidewall. The first sidewall has a first connecting through hole communicating with the first inlet. The top of the second connector has a second connecting through hole communicating with the second outlet. The bottom of the second connector extends into the connecting groove. The fastener penetrates the second sidewall and abuts the second connector against the first sidewall.

10. The dispensing structure for quick-drying adhesive according to claim 1, characterized in that, The dispensing structure for quick-drying adhesive also includes a valve body, in which a positioning ball is provided. The outer periphery of the liquid storage container is provided with an annular groove and a spherical groove connected to the annular groove. When the liquid storage container is installed in conjunction with the valve body, the positioning ball is moved from the annular groove into the spherical groove by rotating the liquid storage container to achieve positioning, thereby forming an axial limit on the liquid storage container.

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