Spray valve

Abstract

To provide a spray valve capable of improving the convenience of assembling work and shortening the assembling time.SOLUTION: The spray valve includes a valve body 10, a striker pin 20, an air nozzle seat 30, and a nozzle structure 40. A striker pin is pierced in the valve body, and a nozzle structure is housed in an air nozzle seat and includes a spray nozzle 42 and a nozzle seat 41. The spray nozzle is mounted on the nozzle seat, and the air nozzle seat is screwed on the bottom of the valve body. Due to the engagement of the impact end 21 of the striker pin with the alignment taper of the spray nozzle and the gap formed between the air nozzle seat and the nozzle seat, the nozzle structure is automatically deflected in the air nozzle seat upon assembly of the spray valve to compensate for manufacturing tolerances between the parts.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a spray valve, and more particularly to a spray valve that is applied to a semiconductor adhesive assembly process and is connected to a dispenser device to dispense gel. [Background technology]

[0002] A spray valve is a device for dispensing gel, especially low-viscosity liquid gel. Connected to a dispenser, the spray valve is used in semiconductor adhesive assembly processes, spraying the gel as a mist onto components to bond them together.

[0003] A conventional spray valve comprises a valve body, a striker pin, and a spray nozzle, of which the valve body is connected to a dispenser device and has a gel retaining passage. The spray nozzle is connected to the lower end of the valve body and has a mating groove and a gel discharge passage. The gel discharge passage extends downward from the mating groove. The striker pin is drilled into the gel retaining passage of the valve body and can contact the mating groove of the spray nozzle.

[0004] When dispensing, the striker pin moves upward and away from the spray nozzle, and the dispenser device supplies gel to the gel holding passage in the valve body.The striker pin then moves downward and pushes the gel out of the gel discharge passage in the spray nozzle.When dispensing is stopped, the striker pin abuts against the fitting groove in the spray nozzle, closing the gel discharge passage and preventing gel from leaking out of the gel discharge passage.

[0005] However, the spray nozzle is directly screwed to the bottom of the valve body with screws, and to facilitate screwing, a certain clearance is provided between the spray nozzle threads and the valve body threads. Therefore, when rotating the spray nozzle to screw it into the valve body, there is a possibility that the spray nozzle may deviate in various directions. Furthermore, because machining errors are unavoidable when machining / manufacturing the valve body, striker pin, and spray nozzle, the striker pin and the fitting groove of the spray nozzle are not perfectly concentric. This causes the striker pin to not fully abut against the fitting groove, creating a gap. Furthermore, the gel discharge passage is not completely blocked, which can lead to gel leakage from the gel discharge passage.

[0006] Therefore, when rotating the spray nozzle and screwing it into the valve body to avoid the above-mentioned problems, the worker must repeatedly rotate and adjust the spray nozzle to ensure that the striker pin and the fitting groove of the spray nozzle are concentric when assembly is complete, which makes the spray valve assembly process inconvenient and more time-consuming. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Chinese Patent No. CN 119017250B Publication [Patent Document 2] Chinese Patent No. CN 101372894B Publication [Patent Document 3] Chinese Patent No. CN 108993826B Publication Summary of the Invention

[0008] The main object of the present invention is to provide a spray valve that can overcome the problem of conventional spray valves in that it is difficult to adjust the striker pin and spray nozzle to be concentric, resulting in a long assembly time and inconvenient assembly work.

[0009] In order to achieve the above object, the present invention provides: a valve body having an outlet formed at a bottom thereof and a screw thread formed on an outer periphery of the outlet; a striker pin that is linearly movable within the valve body and has a tapered impact end formed at its lower end; an air nozzle seat having a coupling portion and a positioning groove formed therein, the coupling portion being screwed to the outlet portion, and the impact end of the striker pin facing the positioning groove; We have proposed a spray valve comprising: a nozzle structure including a nozzle seat and a spray nozzle, wherein the spray nozzle is coupled to the nozzle seat by sliding engagement, an airflow gap is formed between the spray nozzle and the nozzle seat, a flow path penetrates the spray nozzle, an alignment tapered portion communicating with the flow path is formed at one end of the spray nozzle, the nozzle seat is movably housed in the positioning groove, a gap is formed between the outer periphery of the nozzle seat and the inner wall of the positioning groove, and the alignment tapered portion corresponds to the impact end of the striker pin and is configured to be able to come into contact with the impact end.

[0010] The spray valve of the present invention is connected to a dispenser device and is used in adhesive assembly processes for semiconductors and electronic components. When assembling the spray valve, the nozzle seat of the nozzle structure is first coupled to the spray nozzle, the nozzle structure is then inserted into the positioning groove of the air nozzle seat, and the air nozzle seat and nozzle structure are then attached to the valve body to complete the assembly. During dispensing, the dispenser device supplies gel to the interior of the valve body and pushes the gel into the spray nozzle flow passage via the striker pin. The spray valve converts the gel sprayed from the spray nozzle flow passage into mist by transporting gas through the air flow gap formed between the spray nozzle and the nozzle seat of the nozzle structure.

[0011] In the configuration of the present invention, a gap is formed between the outer periphery of the nozzle seat and the inner wall of the positioning groove of the air nozzle seat, allowing the nozzle structure to move in the positioning groove of the air nozzle seat. Furthermore, the alignment tapered portion of the spray nozzle and the impact end of the striker pin are both tapered and fit together. Therefore, when the connecting portion of the air nozzle seat is screwed into the outlet portion of the valve body, the nozzle structure moves slightly on the air nozzle seat, and is positioned by the striker pin and the alignment tapered portion, automatically offsetting manufacturing tolerances between the various components. Furthermore, because the nozzle seat and spray nozzle in the nozzle structure are connected by a sliding fit, no screws are required. The alignment tapered portion of the spray nozzle and the impact end of the striker pin are concentric after assembly is complete, preventing low-viscosity liquid gel from leaking from the spray nozzle flow path when gel supply is stopped.

[0012] As described above, the concentricity of the spray nozzle and striker pin is ensured after the spray valve is assembled due to the fit between the striker pin and the alignment tapered portion of the spray nozzle and the gap formed between the air nozzle seat and the nozzle seat, eliminating the need for repeated adjustments during assembly and improving the convenience of the assembly work. Furthermore, even if the concentricity of the striker pin and the nozzle structure differs during manufacturing and processing, the striker pin and spray nozzle will be concentric after assembly, reducing the requirements for manufacturing and processing precision and reducing costs. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a partial schematic three-dimensional view of a preferred embodiment of a spray valve of the present invention. [Figure 2] 1 is a partially exploded schematic view of a spray valve of the present invention. FIG. [Figure 3] 1 is a partial cross-sectional schematic view of a spray valve of the present invention. [Figure 4] 1 is a partially enlarged cross-sectional schematic view of a spray valve according to the present invention. [Figure 5]FIG. 2 is an exploded schematic view of the nozzle structure of the spray valve of the present invention. [Figure 6] FIG. 2 is a schematic plan view of the nozzle structure of the spray valve of the present invention. [Figure 7] FIG. 7 is a cross-sectional view schematically illustrating the line AA in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0014] As shown in FIGS. 1-3, a preferred embodiment of the spray valve of the present invention includes a valve body 10, a striker pin 20, an air nozzle seat 30, and a nozzle structure 40.

[0015] As shown in FIG. 2, an outlet portion 11 is formed at the bottom of the valve body 10, and a screw thread is formed on the outer periphery of the outlet portion 11.

[0016] As shown in FIGS. 2 and 3, a striker pin 20 is provided so as to be able to move linearly within the valve body 10, and a tapered impact end 21 is formed at the lower end of the striker pin 20.

[0017] As shown in Figures 2 and 3, a connecting portion 31 and a positioning groove 32 are formed inside the air nozzle seat 30, and the connecting portion 31 is screwed into the outlet portion 11 of the valve body 10, with the impact end 21 of the striker pin 20 facing the positioning groove 32.

[0018] 3 to 5, nozzle structure 40 includes nozzle seat 41 and spray nozzle 42. Spray nozzle 42 is coupled to nozzle seat 41 by slide fitting, and an airflow gap is formed between spray nozzle 42 and nozzle seat 41. Spray nozzle 42 has a flow path 421 penetrating spray nozzle 42, and one end of spray nozzle 42 is formed with an alignment tapered portion 422 that communicates with flow path 421. Furthermore, nozzle seat 41 is movably housed in positioning groove 32, and a gap is formed between the outer periphery of nozzle seat 41 and inner wall 321 of positioning groove 32 of air nozzle seat 30, and alignment tapered portion 422 is configured to correspond to and come into contact with impact end 21 of striker pin 20. In addition, the alignment tapered portion 422 of the spray nozzle 42 has a tapered groove shape, the impact end 21 of the striker pin 20 has a tapered shape, and the taper angle and shape of the alignment tapered portion 422 correspond to the taper angle and shape of the impact end 21, respectively.

[0019] The spray valve of the present invention is connected to a dispenser device and is applied to the adhesive assembly process of semiconductors and electronic components. When assembling the spray valve, the nozzle seat 41 of the nozzle structure 40 is first coupled to the spray nozzle 42.

[0020] As shown in Figures 5 to 7, the spray nozzle 42 has an outer annular wall 423, and a fitting groove 411 is formed inside the nozzle seat 41, and the diameter of the outer annular wall 423 corresponds to the inner diameter of the fitting groove 411 so that the spray nozzle 42 is connected to the fitting groove 411 by sliding engagement via the outer annular wall 423.

[0021] 3 and 4, the nozzle structure 40 is placed in the positioning groove 32 of the air nozzle seat 30, and because a gap is formed between the outer periphery of the nozzle seat 41 and the inner wall 321 of the positioning groove 32 of the air nozzle seat 30, the nozzle structure 40 is able to move slightly back and forth and side to side on the air nozzle seat 30. Furthermore, the connecting portion 31 of the air nozzle seat 30 is screwed into the outlet portion 11 of the valve body 10, and the air nozzle seat 30 is brought into contact with the nozzle seat 41, so that the spray nozzle 42 is brought into contact with the nozzle seat 41 and the valve body 10, respectively, and its position is restricted. In this way, the air nozzle seat 30 and the nozzle structure 40 are attached to the valve body 10, completing the assembly.

[0022] During dispensing, the dispenser device supplies gel to the inside of the valve body 10 and pushes the gel into the flow path 421 of the spray nozzle 42 via the striker pin 20. The spray valve of the present invention converts the gel sprayed from the flow path 421 of the spray nozzle 42 into mist by transporting gas through the airflow gap formed between the spray nozzle 42 and the nozzle seat 41 in the nozzle structure 40.

[0023] 3 to 6, the nozzle seat 41 has an air passage structure 412 and a jet passage 413, which form an airflow gap. The air passage structure 412 is located at the top of the nozzle seat 41 and communicates with the fitting groove 411, while the jet passage 413 passes through the nozzle seat 41 in the vertical direction and communicates with the air passage structure 412. The outer annular wall 423 of the spray nozzle 42 is adjacent to the air passage structure 412, and the spray nozzle 42 has a spray end 424 which passes through the air passage structure 412 and the jet passage 413 in that order such that the jet passage 413 surrounds the outer periphery of the spray end 424. The spray valve of the present invention converts gel which has passed through the spray nozzle 42 into mist by supplying air to the spray end 424 of the spray nozzle 42 via the air passage structure 412 and the jet passage 413.

[0024] 4 to 6, when assembling the spray valve of the present invention, the nozzle structure 40 is movable in the positioning groove 32 due to the clearance between the nozzle seat 41 and the positioning groove 32 of the air nozzle seat 30. Furthermore, the alignment tapered portion 422 of the spray nozzle 42 and the impact end 21 of the striker pin 20 are both tapered and have shapes that fit together. Therefore, during the process of screwing the coupling portion 31 of the air nozzle seat 30 into the outlet portion 11 of the valve body 10, the nozzle structure 40 is automatically displaced in the air nozzle seat 30 due to the positioning provided by the tapered shapes of the striker pin 20 and the alignment tapered portion 422, thereby offsetting the manufacturing tolerances between the various parts. Furthermore, because nozzle seat 41 and spray nozzle 42 of nozzle structure 40 are joined by a sliding fit, there is no need for screw fastening. Therefore, during the assembly process, alignment tapered portion 422 of spray nozzle 42 and collision end 21 of striker pin 20 can be maintained concentrically. As a result, when collision end 21 of striker pin 20 abuts against alignment tapered portion 422 of spray nozzle 42, flow path 421 of spray nozzle 42 is reliably closed, preventing leakage from flow path 421 when supply is stopped.

[0025] In this way, due to the fit between the striker pin 20 and the alignment tapered portion 422 of the spray nozzle 42 and the gap formed between the air nozzle seat 30 and the nozzle seat 41, the spray nozzle 42 and the striker pin 20 are automatically made concentric after the spray valve of the present invention is assembled, eliminating the need for repeated adjustments during assembly and improving the convenience of the assembly work. Furthermore, even if the concentricity of the striker pin 20 and the nozzle structure 40 varies during manufacturing and processing, the striker pin 20, the flow path 421 of the spray nozzle 42, and the spray end portion 424 are made concentric after assembly, which reduces the demands for manufacturing and processing precision and reduces costs.

[0026] As described above, the spray valve of the present invention is applied to spraying mist gel, particularly low-viscosity liquid gel, and due to the engagement between the striker pin 20 and the alignment tapered portion 422 of the spray nozzle 42 and the gap formed between the air nozzle seat 30 and the nozzle seat 41, the nozzle structure 40 automatically shifts on the air nozzle seat 30 during assembly of the spray valve, thereby offsetting manufacturing tolerances among the various components. Therefore, when assembly of the spray valve is complete, the spray nozzle 42 and the striker pin 20 automatically become concentric, so that the striker pin 20 reliably abuts against the alignment tapered portion 422 of the spray nozzle 42 to reliably close the flow path of the spray nozzle 42, thereby improving the convenience of the assembly work and reducing the assembly time. [Explanation of symbols]

[0027] 10 Valve body 11 Exit section 20 striker pin 21 Collision end 30 Air nozzle seat 31 Joint part 32 Positioning groove 321 Interior wall 40 Nozzle structure 41 Nozzle seat 411 Fitting groove 412 Air passage structure 413 Fumarole Passage 42 spray nozzle 421 Channel 422 Alignment tapered section 423 Outer ring wall 424 Spray End

Claims

1. a valve body having an outlet formed at a bottom thereof and a screw thread formed on an outer periphery of the outlet; a striker pin that is linearly movable within the valve body and has a tapered impact end formed at its lower end; an air nozzle seat having a coupling portion and a positioning groove formed therein, the coupling portion being screwed to the outlet portion, and the impact end of the striker pin facing the positioning groove; a nozzle structure including a nozzle seat and a spray nozzle, wherein the spray nozzle is coupled to the nozzle seat by a sliding fit, an airflow gap is formed between the spray nozzle and the nozzle seat, a flow path penetrates the spray nozzle, one end of the spray nozzle is formed with an alignment tapered portion communicating with the flow path, the nozzle seat is movably received in the positioning groove, a gap is formed between an outer periphery of the nozzle seat and an inner wall of the positioning groove, and the alignment tapered portion corresponds to the impact end of the striker pin and is configured to be able to come into contact with the impact end.

2. 2. The spray valve according to claim 1, wherein when the coupling portion of the air nozzle seat is screwed into the outlet portion of the valve body, the air nozzle seat abuts against the nozzle seat, whereby the spray nozzle is abutted by the nozzle seat and the valve body, respectively, and its position is restricted.

3. 2. The spray valve according to claim 1, wherein the spray nozzle has an outer annular wall, a fitting groove is formed inside the nozzle seat, and a diameter of the outer annular wall corresponds to an inner diameter of the fitting groove so that the spray nozzle is coupled to the fitting groove through the outer annular wall by a sliding fit.

4. 3. The spray valve according to claim 2, wherein the spray nozzle has an outer annular wall, a fitting groove is formed inside the nozzle seat, and a diameter of the outer annular wall corresponds to an inner diameter of the fitting groove so that the spray nozzle is coupled to the fitting groove through the outer annular wall by a sliding fit.

5. 5. The spray valve according to claim 1, wherein the nozzle seat has a spray passage that passes through the nozzle seat in the vertical direction, the spray nozzle has a spray end that passes through the spray passage, and the spray passage is provided so as to surround an outer periphery of the spray end.

6. 3. The spray valve of claim 1, wherein the nozzle seat has an air passage structure, the air passage structure is located at the top of the nozzle seat and communicates with the top and bottom of the nozzle seat, and the spray nozzle has a spray end that passes through the air passage structure.

7. 5. The spray valve according to claim 3, wherein the nozzle seat has an air passage structure, the air passage structure is located at the top of the nozzle seat and communicates with the top and bottom of the nozzle seat and with the fitting groove, the outer annular wall of the spray nozzle is adjacent to the air passage structure, and the spray nozzle has a spray end that penetrates the air passage structure.

8. 6. The spray valve according to claim 5, wherein the nozzle seat has an air passage structure, the air passage structure is located on the top of the nozzle seat and communicates with the spray passage, and the spray end passes through the air passage structure and the spray passage in order.

9. 5. The spray valve of claim 1, wherein the alignment tapered portion of the spray nozzle has a tapered groove shape, the impact end of the striker pin has a tapered shape, and the taper angle of the alignment tapered portion corresponds to the taper angle of the impact end.

10. 9. The spray valve of claim 8, wherein the alignment tapered portion of the spray nozzle has a tapered groove shape, the impact end of the striker pin has a tapered shape, and a taper angle of the alignment tapered portion corresponds to a taper angle of the impact end.

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