Dispensing structure for instant adhesive

Abstract

The invention provides a dispensing structure for quick-drying glue. The dispensing structure comprises a liquid storage container, a valve needle, a first sealing ring and a second sealing ring, the liquid storage container is provided with a containing cavity, the first sealing ring and the second sealing ring are arranged in the containing cavity, the valve needle extends into the containing cavity and sequentially penetrates through the first sealing ring and the second sealing ring, and a first storage cavity for containing dispergator is formed between the first sealing ring and the second sealing ring. A second storage cavity for containing the instant adhesive is formed in the side, away from the first sealing ring, of the second sealing ring, a first adhesive outlet is formed in the bottom of the second storage cavity, the valve needle moves up and down to control opening and closing of the first adhesive outlet, and the side wall of the liquid storage container is further provided with a first adhesive inlet communicated with the second storage cavity so that the instant adhesive can enter the first adhesive inlet. The first sealing ring and the second sealing ring can prevent the contact part of the valve needle and the quick-drying adhesive from being in contact with air, and when the valve needle moves up and down, the surface of the valve needle can be in continuous contact with and attached to a trace of peptizer, so that the quick-drying adhesive can be dissolved or prevented from being attached, and the quick-drying adhesive is prevented from being accumulated and cured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dispensing equipment, in particular to a dispensing structure for quick-drying adhesive. BACKGROUND

[0002] Quick-drying adhesive (such as cyanoacrylate) is widely used in precision dispensing (especially microelectronics, medical device assembly) due to its rapid curing characteristics. Since quick-drying adhesive is prone to solidification after contacting air, it is easy to accumulate and solidify on the surface of the valve needle (striker), causing the valve needle to move and jam, the valve to close loosely, the dispensing amount to be out of control, and even the precision valve body to be damaged.

[0003] Therefore, it is necessary to provide a dispensing structure for quick-drying adhesive to avoid the accumulation and solidification of quick-drying adhesive on the valve needle. SUMMARY

[0004] In view of the above deficiencies of the prior art, the purpose of the present application is to provide a dispensing structure for quick-drying adhesive and a dispensing equipment to avoid the accumulation and solidification of quick-drying adhesive on the valve needle.

[0005] According to an embodiment of the present application, a first scheme is provided: a dispensing structure for quick-drying adhesive, comprising a liquid storage container, a valve needle, a first sealing ring and a second sealing ring; the liquid storage container is provided with a receiving cavity, the first sealing ring and the second sealing ring are arranged in the receiving cavity, the valve needle extends into the receiving cavity and penetrates the first sealing ring and the second sealing ring in sequence, a first storage cavity for receiving a glue dissolving 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 glue 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 glue outlet, and a first glue inlet is further provided on the side wall of the liquid storage container and communicates with the second storage cavity for the quick-drying adhesive to enter.

[0006] In a preferred scheme, the second sealing ring is provided with an inner hole for the valve needle to pass through, the inner hole comprises a first hole part and a second hole part, the first hole part is located between the second hole part and the first storage cavity, a first gap is formed between the first hole part and the valve needle, the glue dissolving agent in the first storage cavity diffuses to the first gap, and the inner wall of the second hole part is in contact with the valve needle.

[0007] In a preferred scheme, the liquid storage container is further provided with a first liquid inlet and a sealing member, the first liquid inlet communicates with the first storage cavity, and the sealing member is detachably sealed and 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, and the liquid storage accessory, the first sealing ring and the second sealing ring enclose the first storage cavity.

[0009] In a preferred embodiment, the liquid storage accessory comprises an extension part extending out of the slot, and the sealing part is inserted into the extension part and seals the first liquid inlet.

[0010] In a preferred embodiment, the inner wall of the liquid storage container at the second storage cavity is gradually tapered away from the second sealing ring, and the included angle between any two adjacent faces 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 glue outlet and the first glue inlet are provided with smooth inert protective plating, which is Ni-P alloy plating, DLC plating or PTFE composite plating.

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

[0013] In a preferred embodiment, the flow guide comprises a first connecting part, a second connecting part and a fastener, and the quick-drying glue flows from the second glue outlet to the second connecting part, the first connecting part and the first glue inlet in sequence; the first connecting part comprises a sleeve part sleeved with the outer periphery of the liquid storage container, and the first connecting part is further provided with a connecting groove comprising opposite first and second side walls, the first side wall is provided with a first connecting through hole communicating with the first glue inlet, the top of the second connecting part is provided with a second connecting through hole communicating with the second glue outlet, the bottom of the second connecting part extends into the connecting groove, and the fastener penetrates through the second side wall and abuts the second connecting part against the first side wall.

[0014] In a preferred embodiment, the glue dispensing structure for quick-drying glue further comprises a valve body, the valve body is provided with a positioning ball, the outer periphery of the liquid storage container is provided with an annular groove and a spherical groove connected with the annular groove, and when the liquid storage container and the valve body are connected and installed, the positioning ball is slid into the spherical groove from the annular groove by rotating the liquid storage container to achieve positioning, so as to form axial limiting for the liquid storage container.

[0015] The present application has the following advantages: In the scheme of the present application, the first sealing ring and the second sealing ring can avoid the part of the valve needle in contact with the quick-drying adhesive from contacting air, and when the valve needle moves up and down, the surface thereof will continuously contact and adhere to a small amount of degelling agent, which can effectively dissolve or prevent the adhesion of a small amount of quick-drying adhesive that may be adhered to the surface of the valve needle, prevent the accumulation and solidification of the quick-drying adhesive to cause the valve needle to stick, thereby avoiding the valve needle from being stuck or dead-stuck, and can greatly improve the service life of the glue dispensing valve, reduce maintenance costs and unexpected downtime. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A structure diagram of a glue dispensing structure for quick-drying adhesive according to an embodiment of the present application; Figure 2 A structure diagram of a glue dispensing structure for quick-drying adhesive according to an embodiment of the present application; Figure 3 A structure diagram of a second sealing ring according to an embodiment of the present application; Figure 4 A cooperation diagram of a valve needle and a second sealing ring according to an embodiment of the present application; Figure 5 A structure diagram of a glue dispensing structure for quick-drying adhesive according to an embodiment of the present application; Figure 6 A structure diagram of a glue dispensing structure for quick-drying adhesive according to an embodiment of the present application; Figure 7 A partial structure diagram of a glue dispensing structure for quick-drying adhesive according to an embodiment of the present application.

[0017] Reference signs: 10, liquid storage container; 11, accommodation cavity; 111, first storage cavity; 112, second storage cavity; 113, first glue outlet; 114, first glue inlet; 13, insertion 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 part; 412, second hole part; 413, first gap; 50, sealing member; 60, glue barrel; 70, drainage member; 71, first connecting member; 711, sleeve part; 712, groove; 713, first side wall; 714, second side wall; 72, second connecting member; 73, fastening member; 80, valve body; 81, positioning ball; DETAILED DESCRIPTION

[0018] In order for the person skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor fall within the scope of protection of the present application.

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

[0020] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or component referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0021] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple", "several" is two or more, unless otherwise explicitly specified.

[0022] It should be understood that the structures, proportions, sizes and the like shown in the drawings of the present application are only used to cooperate with the content disclosed in the specification, to enable those skilled in the art to understand and read, and do not have technical significance, any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0023] Please refer to Figures 1-7An embodiment of the present application provides a glue dispensing structure for instant glue, which comprises 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 is provided with a receiving cavity 11, the first sealing ring 30 and the second sealing ring 40 are arranged in the receiving cavity 11, the valve needle 20 extends into the receiving cavity 11 and penetrates the first sealing ring 30 and the second sealing ring 40 in sequence, a first storage cavity 111 for storing glue dissolving agent is formed between the first sealing ring 30 and the second sealing ring 40, a second storage cavity 112 for storing instant glue is formed on the side of the second sealing ring 40 away from the first sealing ring 30, the bottom of the second storage cavity 112 is provided with a first glue outlet 113, the valve needle 20 moves up and down to control the opening and closing of the first glue outlet 113, and the side wall of the liquid storage container 10 is further provided with a first glue inlet 114 which is in communication with the second storage cavity 112 and is used for the instant glue to enter.

[0024] The glue dissolving agent can be used to dissolve the instant glue and prevent the instant glue from adhering to the surface of the valve needle 20, for example, the glue dissolving agent can be nitromethane solvent for cyanoacrylate glue, or other types of glue dissolving paste or glue dissolving oil special for instant glue.

[0025] In the embodiment, the first sealing ring 30 and the second sealing ring 40 are arranged to avoid the part of the valve needle 20 in contact with the instant glue from contacting air, and when the valve needle 20 moves up and down, the surface of the valve needle 20 continuously contacts and adheres to a small amount of glue dissolving agent, which can effectively dissolve or prevent the small amount of instant glue adhering to the surface of the valve needle 20, prevent the instant glue from accumulating and solidifying to cause the valve needle 20 to be stuck, thereby avoiding the valve needle 20 from being jammed or stuck, and greatly improving the service life of the glue dispensing valve, reducing maintenance cost and unexpected downtime.

[0026] In a preferred embodiment, the glue dispensing structure can be used for instant glue, and the glue dissolving agent can be used to dissolve the instant glue and prevent the instant glue from adhering to the surface of the valve needle 20. Figures 2-4 The second sealing ring 40 is provided with an inner hole 41 through which the valve needle 20 penetrates, the inner hole 41 comprises a first hole part 411 and a second hole part 412, the first hole part 411 is located between the second hole part 412 and the first storage cavity 111, a first gap 413 is formed between the first hole part 411 and the valve needle 20, the glue dissolving agent in the first storage cavity 111 diffuses to the first gap 413, and the inner wall of the second hole part 412 is attached to the valve needle 20.

[0027] In the embodiment, the inner wall of the second hole part 412 is attached to the valve needle 20, the glue dissolving agent does not directly mix with the instant glue in the second storage cavity, and the first gap 413 is formed between the first hole part 411 and the valve needle 20, so that the glue dissolving agent can better diffuse by molecules or capillary action to form a protective layer in the first gap 413.

[0028] In a preferred embodiment, the liquid storage container 10 is further provided with a first liquid inlet (not shown in the figure) communicating with the first storage cavity 111 for facilitating injection of the adhesive into the first storage cavity 111, and a sealing member 50 detachably sealingly connected to the first liquid inlet to avoid air 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, and a liquid storage accessory 14 is detachably inserted into the slot 13, and the liquid storage accessory 14, the first sealing ring 30 and the second sealing ring 40 enclose 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 achieved, and the sealing effect can be better.

[0030] Preferably, the liquid storage accessory 14 can be a liquid storage accessory 14 as shown in Figure 1 , both ends of the liquid storage accessory 14 extend out of the slot 13 to form an extension 141, the first liquid inlet is formed in the extension 141, and the sealing member 50 is inserted into the extension 141 and seals the first liquid inlet.

[0031] In a preferred embodiment, the liquid storage accessory 14 can be a liquid storage accessory 14 as shown in Figure 2 , the inner wall of the liquid storage container 10 at the second storage cavity 112 gradually shrinks in a direction away from the second sealing ring 40, and the included angle between any two adjacent faces of the inner wall of the liquid storage container 10 at the second storage cavity 112 is greater than 90°. In this way, there is no dead angle in the inner wall of the second storage cavity 112, the resistance formed is small, and the glue liquid residue can be reduced. When the glue is triggered, the glue liquid can quickly reach the needle tip with minimal resistance, achieving the first time glue dispensing, and reducing the glue breakage, wire drawing and glue hanging phenomenon caused by glue liquid retraction or surface solidification.

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

[0033] In this embodiment, the inner wall of the liquid storage container 10 can be metal or engineering plastic, and the smooth inert protective plating layer provided can effectively prevent the direct contact of the quick-drying glue with the inner wall of the liquid storage container 10, prevent the glue liquid from denaturing, polymerization acceleration or flow channel corrosion caused by chemical reaction, provide a smooth surface, and significantly reduce the adhesive force of the glue liquid, further reduce glue hanging and glue liquid residue, and improve the flow channel cleanliness and glue liquid flowability.

[0034] In a preferred embodiment, the liquid storage container 10 can be a liquid storage container 10 as shown inFigures 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 foregoing description of the disclosed embodiments enables a person skilled in the art to make or use the application. Modifications of these embodiments will occur to persons of skill in the art, and that the appended claims are intended to cover all such modifications that do not depart from the true spirit and scope of the application. Therefore, the application is not limited to the embodiments shown 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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