Double-head dispensing head

Abstract

This utility model relates to the field of dispensing head technology, and more particularly to a dual-head dispensing head, including a housing. The interior of the housing is hollow, and the top and bottom of the housing are integrally formed with a connecting part and two dispensing nozzles arranged side by side. A flat glue assembly can be detachably installed at the bottom of each dispensing nozzle. The flat glue assembly includes a flat glue nozzle inserted into the bottom of the dispensing nozzle. A through hole is opened on the outer wall of the flat glue nozzle, and a bolt is inserted into the through hole. One end of the bolt is threaded into a threaded hole opened on the outer wall of the dispensing nozzle. A flat glue outlet is provided at the bottom of the flat glue nozzle. This dual-head dispensing head can form a flat glue line when dispensing, and can extrude a flat glue line that matches the LED bracket structure in one go. The dispensing efficiency is high, and the filling efficiency is 3 times higher than that of traditional round dispensing nozzles. The bubble residual rate is reduced from 12% to less than 2%, and the cross-sectional area error of the glue layer can be significantly reduced, thereby meeting the requirements of high-precision packaging.

Description

Technical Field

[0001] This utility model relates to the field of dispensing head technology, specifically a double-headed dispensing head. Background Technology

[0002] In precision dispensing processes such as electronic packaging and LED manufacturing, the structural design of the dispensing head nozzle directly affects the molding accuracy, production efficiency, and product reliability of the adhesive. Traditional dispensing technologies mostly use nozzles with a circular cross-section, which are gradually revealing significant limitations in meeting the demands of modern high-precision and complex dispensing. The main technical bottlenecks of traditional circular dispensing nozzles are: 1. Circular nozzles are characterized by "dot-like dispensing". If a linear or planar adhesive layer needs to be formed (such as the sealing adhesive line on the edge of an LED bracket), it needs to be completed by repeated scanning or multi-point superposition by a robotic arm, which leads to a longer production cycle. 2. For structures such as narrow slits (such as grooves less than 0.2mm) and irregular surfaces (such as stepped electrodes) in LED brackets, the circular nozzle is prone to glue overflow or insufficient filling due to the radial diffusion of the dispensing pattern. Especially in ultra-thin bracket packaging, the residual air bubble rate can reach more than 15%. 3. The dispensing cross section of the circular nozzle is circular, and the thickness and width of the adhesive layer are difficult to control independently. When it is necessary to adjust the adhesive line width, the dispensing amount and movement speed need to be changed simultaneously, which can easily lead to fluctuations in the adhesive layer thickness (error can reach ±15%), which cannot meet the requirements of high-precision packaging. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a dual-head dispensing head that solves the technical problems of insufficient efficiency and coverage, poor adaptability to complex structures, and low precision in dispensing volume control of traditional dispensing heads.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a double-headed dispensing head, including a shell, the interior of which is a hollow structure, and the top and bottom of the shell are integrally formed with a connecting part and two dispensing nozzles arranged side by side, and the bottom of the two dispensing nozzles can be detachably installed with a flat glue assembly;

[0005] The flat adhesive assembly includes a flat adhesive nozzle inserted into the bottom of the dispensing nozzle. A through hole is provided on the outer wall of the flat adhesive nozzle, and a bolt is inserted into the through hole. One end of the bolt is threaded into a threaded hole on the outer wall of the dispensing nozzle. The bottom of the flat adhesive nozzle is provided with a flat dispensing port.

[0006] Preferably, the inner wall of the flat nozzle is provided with two symmetrically arranged guide protrusions, and the two guide protrusions are respectively inserted into two guide grooves opened on the outer wall of the nozzle.

[0007] Preferably, the inner wall of the flat nozzle is provided with an inwardly protruding annular protrusion, and the annular protrusion is provided with a sealing gasket that fits against the bottom of the nozzle.

[0008] Preferably, the outer wall of the connecting part is provided with external threads.

[0009] Preferably, the outer shell and the two dispensing nozzles are in an inverted "Y" shape.

[0010] Preferably, the dispensing outlets of the two flat nozzles are on the same horizontal axis.

[0011] By employing the above technical solution, this utility model provides a dual-head dispensing head, which has at least the following beneficial effects:

[0012] 1. This dual-head dispensing head features a detachable flat adhesive assembly at the bottom of the dispensing nozzle. Because the dispensing opening at the bottom of the flat nozzle in the flat adhesive assembly is flat, it can form a flat adhesive line during dispensing, allowing for the extrusion of a flat adhesive line that matches the LED bracket structure in one go. This results in high dispensing efficiency and allows the adhesive to spread evenly along the flat opening. The filling efficiency is 3 times higher than that of traditional round dispensing nozzles, and the air bubble residual rate is reduced from 12% to below 2%. Furthermore, by coordinating the adjustment of the opening size of the flat nozzle with the dispensing parameters, the cross-sectional area error of the adhesive layer can be significantly reduced, thereby meeting the requirements of high-precision packaging.

[0013] 2. This dual-head dispensing head, with two dispensing nozzles at the bottom of the housing, can complete dispensing on both sides at once, avoiding repeated positioning and calibration, optimizing production cycle. Simultaneous dispensing from both sides of the LED bracket ensures uniform distribution, pressure, and curing shrinkage of the adhesive on both sides of the bracket, reducing problems such as bracket deformation and chip misalignment caused by dispensing on one side, and improving product structural stability. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of the present invention, form part of this application:

[0015] Figure 1 This is a three-dimensional structural diagram of the entire utility model;

[0016] Figure 2 This is a schematic diagram showing the internal cross-section of the outer shell of this utility model;

[0017] Figure 3 This is a schematic diagram of the disassembled flat rubber component of this utility model;

[0018] Figure 4 This is a cross-sectional structural diagram of the flat nozzle of this utility model.

[0019] Figure label:

[0020] 1. Outer shell; 11. Connecting part; 111. External thread; 12. Dispensing nozzle; 121. Guide groove; 122. Threaded hole; 2. Flat glue assembly; 21. Flat glue nozzle; 211. Through hole; 212. Guide protrusion; 213. Annular protrusion; 214. Dispensing port; 22. Bolt; 23. Sealing gasket. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In modern industrial production, dispensing is a crucial step, widely used in numerous fields such as electronics, automobiles, and medical devices. Especially in the LED manufacturing industry, dispensing quality directly impacts the performance and reliability of LED products.

[0023] Due to the limitations of existing technologies, such as insufficient efficiency and coverage, poor adaptability to complex structures, and low precision in adhesive dosage control, please refer to... Figures 1-4This utility model provides a dual-head dispensing head that can extrude a flat adhesive line matching the LED bracket structure in one pass, achieving high dispensing efficiency. The filling efficiency is three times higher than that of a traditional circular dispensing nozzle 12, reducing the bubble residue rate from 12% to below 2%, and significantly reducing the cross-sectional area error of the adhesive layer, thus meeting the requirements of high-precision packaging. The dispensing head includes a housing 1 with a hollow interior. The top and bottom of the housing 1 are integrally formed with a connecting part 11 and two parallel dispensing nozzles 12, respectively. A flat adhesive assembly 2 can be detachably installed at the bottom of each of the two dispensing nozzles 12. The hollow structure design ensures smooth adhesive flow and reduces bubbles caused by turbulence. The two dispensing nozzles 12 can dispense adhesive synchronously with a pressure difference ≤5%, improving adhesive consistency. The flat adhesive assembly 2 can form a flat adhesive line during dispensing, further improving dispensing efficiency. Specifically, the flat adhesive assembly 2 includes... A flat nozzle 21 is inserted into the bottom of the dispensing nozzle 12. A through hole 211 is provided on the outer wall of the flat nozzle 21, and a bolt 22 is inserted into the through hole 211. One end of the bolt 22 is threaded into the threaded hole 122 provided on the outer wall of the dispensing nozzle 12. The bottom of the flat nozzle 21 is provided with a flat dispensing port 214. The flat nozzle 21 is installed at the bottom of the dispensing nozzle 12 by insertion, which is convenient for disassembly and assembly. It can be selected to use a round dispensing method or a flat dispensing method according to actual use needs. The flat dispensing port 214 can easily form a flat glue line when dispensing, and can extrude a flat glue line that matches the LED bracket structure in one go. The dispensing efficiency is high, and the glue can be spread evenly along the flat opening. The filling efficiency is 3 times higher than that of the traditional round dispensing nozzle 12. The air bubble residual rate is reduced from 12% to less than 2%. Moreover, by coordinating the adjustment of the opening size of the flat nozzle and the dispensing parameters, the cross-sectional area error of the glue layer can be greatly reduced.

[0024] Since the insertion positions of the dispensing nozzle 12 and the flat nozzle 21 are both circular, there is a risk of misalignment during the installation of the flat nozzle 21. To address this issue, two symmetrically arranged guide protrusions 212 are provided on the inner wall of the flat nozzle 21, and the two guide protrusions 212 are respectively inserted into two guide grooves 121 opened on the outer wall of the dispensing nozzle 12. Through the cooperation of the guide protrusions 212 and the guide grooves 121, the installation position of the flat nozzle 21 can be restricted, making its installation more accurate and reliable.

[0025] Since the flat nozzle 21 is installed at the bottom of the dispensing nozzle 12 by plugging it in, glue leakage is likely to occur at the connection point due to gaps. To address this issue, an inwardly protruding annular protrusion 213 is provided on the inner wall of the flat nozzle 21. A sealing gasket 23 is provided on the annular protrusion 213 to fit against the bottom of the dispensing nozzle 12. The annular protrusion 213 supports the sealing gasket 23, and the sealing gasket 23 can be used to fit against the bottom of the dispensing nozzle 12, thereby forming a seal between the dispensing nozzle 12 and the flat nozzle 21 to reduce glue leakage.

[0026] Furthermore, an external thread 111 is provided on the outer wall of the connecting part 11; by providing the external thread 111, the whole part can be installed on the equipment by means of threads, which has the advantage of simple installation.

[0027] Furthermore, the outer shell 1 and the two dispensing nozzles 12 are in an inverted "Y" shape; precise dispensing of adhesive is achieved through axisymmetric flow splitting. The Y-shaped flow channel is designed with optimized fluid dynamics to maintain the flow splitting state during the flow splitting process. The adhesive flows bidirectionally within the outer shell 1, which can effectively eliminate the flow dead zone caused by the gold wire array. At the same time, it can reduce the bubble rate from 12.2% in the traditional process to 0.7%, and the pin contamination rate from 9.7% to 0.2%.

[0028] If there is a height difference between the two dispensing nozzles 214 on both sides of the double-headed dispensing head, it will cause uneven force on both sides of the bracket during dispensing, and the bracket is prone to deformation after curing. To address this issue, the dispensing nozzles 214 of the two flat nozzles 21 are aligned on the same horizontal axis. This ensures that the adhesive layer thickness on both sides of the bracket is consistent, resulting in uniform force on both sides of the bracket and reducing the problem of bracket deformation after curing.

[0029] It should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A double-headed dispensing head, comprising a housing (1), characterized in that: The interior of the outer shell (1) is hollow, and the top and bottom of the outer shell (1) are integrally formed with a connecting part (11) and two glue outlets (12) arranged side by side. The bottom of the two glue outlets (12) can be detachably installed with a flat glue assembly (2). The flat adhesive assembly (2) includes a flat adhesive nozzle (21) inserted into the bottom of the dispensing nozzle (12). A through hole (211) is provided on the outer wall of the flat adhesive nozzle (21). A bolt (22) is inserted into the through hole (211). One end of the bolt (22) is threaded into the threaded hole (122) on the outer wall of the dispensing nozzle (12). The bottom of the flat adhesive nozzle (21) is provided with a flat dispensing port (214).

2. The dual-head dispensing head according to claim 1, characterized in that: The inner wall of the flat nozzle (21) is provided with two symmetrically arranged guide protrusions (212), and the two guide protrusions (212) are respectively inserted into the two guide grooves (121) opened on the outer wall of the nozzle (12).

3. The dual-head dispensing head according to claim 1, characterized in that: The inner wall of the flat nozzle (21) is provided with an inwardly protruding annular protrusion (213), and the annular protrusion (213) is provided with a sealing gasket (23) that fits against the bottom of the dispensing nozzle (12).

4. The dual-head dispensing head according to claim 1, characterized in that: The outer wall of the connecting part (11) is provided with an external thread (111).

5. The dual-head dispensing head according to claim 1, characterized in that: The outer shell (1) and the two dispensing nozzles (12) are in an inverted "Y" shape.

6. The dual-head dispensing head according to claim 1, characterized in that: The outlets (214) of the two flat nozzles (21) are on the same horizontal axis.

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