Glue injection device and glue injection method

Abstract

The invention discloses a glue injection device and a glue injection method, the glue injection device is applied to an optocoupler device, and the optocoupler device comprises a plurality of optocoupler units arranged in an array; each optocoupler unit comprises a glue inlet; the glue injection device comprises at least one glue injection module; the glue injection module comprises a main runner, a plurality of branch runners, a plurality of glue injection nozzles and a positioning needle; the branch runner is respectively communicated with the main runner and the glue injection nozzle; the sub-runners are arranged in the first direction and extend in the second direction; the first direction intersects with the second direction; in the second direction, the multiple glue injection nozzles are arranged on the same sub-runner; and the positioning pin is aligned with a positioning hole in the optocoupler device, so that the glue injection nozzle is aligned with the glue inlet, and glue sequentially passes through the main runner, the branch runner and the glue injection nozzle to reach the glue inlet. By adopting the technical means, the glue injection device is adopted to inject white glue into the optocoupler unit through the glue injection port in a point type glue feeding manner for packaging, so that independent packaging of the optocoupler unit is realized, the packaging process is simple, and the efficiency is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical coupling packaging, in particular to an injection device and an injection method. BACKGROUND

[0002] With the increasingly fierce competition in the optical coupling market, in the process of white glue packaging of the optical coupling in the traditional optical coupling plastic packaging process, the optical coupling is packaged by the side glue injection method. After packaging, the excess residual glue and the middle ribs need to be punched and removed by automatic glue removal equipment and molds. After removal, the heating table is heated again for black glue packaging. In this way, the white glue overflow will occur in the process of white glue packaging by the side glue injection method, which will affect the packaging effect and efficiency of the optical coupling. SUMMARY

[0003] The present application provides an injection device and an injection method to realize independent packaging of optical coupling units, which is simple and efficient.

[0004] In a first aspect, the present application provides an injection device applied to an optical coupling device, the optical coupling device comprising a plurality of arrayed optical coupling units; each of the optical coupling units comprising a glue inlet;

[0005] The injection device comprises at least one injection module; the injection module comprises a main flow channel, a plurality of sub-flow channels, a plurality of injection nozzles and a positioning needle;

[0006] The sub-flow channels are respectively communicated with the main flow channel and the injection nozzles; a plurality of sub-flow channels are arranged along a first direction and each extends along a second direction; the first direction intersects the second direction;

[0007] Along the second direction, a plurality of injection nozzles are arrayed on the same sub-flow channel;

[0008] The positioning needle is aligned with a positioning hole in the optical coupling device to align the injection nozzle with the glue inlet, so that the glue passes through the main flow channel, the sub-flow channel and the injection nozzle to the glue inlet in sequence.

[0009] Optionally, the injection module further comprises a buffer flow channel;

[0010] The buffer flow channel is located on the side of the sub-flow channel away from the injection nozzle, and a plurality of buffer flow channels are arranged on the sub-flow channel along the second direction;

[0011] The buffer flow channel is communicated with the sub-flow channel.

[0012] Optionally, in the same sub-flow channel, the normal projection of the injection nozzle on the sub-flow channel is staggered with the normal projection of the buffer flow channel on the sub-flow channel.

[0013] Optionally, along the first direction, the distance between two adjacent glue injection nozzles in two adjacent distribution channels is equal to the distance between two adjacent glue inlets; along the second direction, the distance between two adjacent glue injection nozzles in the same distribution channel is equal to the distance between two adjacent glue inlets.

[0014] Optionally, the main flow channel comprises a first main flow subpart, a second main flow subpart and a third main flow subpart which are arranged in communication;

[0015] The first main flow subpart extends along the second direction; along the first direction, the second main flow subpart and the third main flow subpart are respectively located on two sides of the first main flow subpart and extend along the first direction;

[0016] The number of distribution channels in communication with the second main flow subpart is equal to the number of distribution channels in communication with the third main flow subpart.

[0017] Optionally, the distribution channel comprises a first distribution channel subpart and a second distribution channel subpart which are arranged in communication;

[0018] Along the second direction, the first distribution channel subpart and the second distribution channel subpart are respectively located on two sides of the second main flow channel subpart and two sides of the third main flow channel, and the number of glue injection nozzles in communication with the first distribution channel subpart is equal to the number of glue injection nozzles in communication with the second distribution channel.

[0019] Optionally, the main flow channel, the distribution channel and the glue injection nozzle are arranged integrally.

[0020] Optionally, the glue injection nozzle comprises a glue storage groove and a glue outlet;

[0021] The glue storage groove is in communication with the glue outlet and the distribution channel respectively, and the average diameter of the glue storage groove is greater than the average diameter of the glue outlet.

[0022] Optionally, the average diameter of the glue outlet is less than or equal to the diameter of the glue inlet.

[0023] In a second aspect, the embodiment of the present application further provides a glue injection method, which is realized by using the glue injection device of any one of the first aspect, and the glue injection method comprises the following steps:

[0024] Placing at least one glue injection module on one side of an optocoupler; the glue injection module comprises a main flow channel, a plurality of distribution channels, a plurality of glue injection nozzles and a positioning needle; the distribution channel is in communication with the main flow channel and the glue injection nozzle respectively; the plurality of distribution channels are arranged along a first direction and extend along a second direction; the first direction intersects with the second direction; along the second direction, the plurality of glue injection nozzles are arranged on the same distribution channel;

[0025] The positioning needle of the glue injection module is aligned with the positioning hole in the light coupling unit, so that the glue injection nozzle is aligned with the glue inlet, and the glue passes through the main flow channel, the branch flow channel and the glue injection nozzle to the glue inlet in sequence.

[0026] The technical scheme provided by the embodiment of the present application, the glue injection device comprises at least one glue injection module; the glue injection module comprises a main flow channel, a plurality of branch flow channels, a plurality of glue injection nozzles and a positioning needle; the branch flow channels are respectively communicated with the main flow channel and the glue injection nozzles, so that the glue flows from the main flow channel and the branch flow channels to the glue injection nozzles in sequence. In the second direction, the plurality of glue injection nozzles are arranged on the same branch flow channel. Each glue injection nozzle corresponds to a glue inlet in the light coupling unit. The positioning needle is aligned with the positioning hole in the light coupling unit, so that the glue injection nozzle is aligned with the glue inlet, and the glue passes through the main flow channel, the branch flow channel and the glue injection nozzle to the glue inlet in sequence, thereby realizing point glue injection for each light coupling unit, so that overflow of white glue during white glue plastic packaging of the light coupling unit can be prevented, the packaging process of the light coupling unit can be simplified, the packaging efficiency is high, and the cost and energy consumption can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0028] Figure 1 It is a top view schematic diagram of a light coupling device in the prior art;

[0029] Figure 2 It is Figure 1 It is an enlarged schematic diagram of aa area in the figure;

[0030] Figure 3 It is a structural schematic diagram of a glue injection device provided by the embodiment of the present application;

[0031] Figure 4 It is Figure 3 It is an enlarged schematic diagram of corresponding bb area;

[0032] Figure 5 It is Figure 3 It is a sectional structure schematic diagram along the section line A-A' in the figure;

[0033] Figure 6 It is a flow schematic diagram of a glue injection method provided by the embodiment of the present application. DETAILED DESCRIPTION

[0034] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0035] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in sequences other than those illustrated or described herein.

[0036] Before describing the specific implementation methods of the embodiments of the present invention in detail, the optical coupling encapsulation method in the prior art will be described first.

[0037] Figure 1 This is a top view schematic diagram of an optocoupler device in the prior art, such as... Figure 1 As shown, white glue enters each optocoupler unit 201' through the glue injection device 100' located on the side of the optocoupler device, i.e., white glue is injected into the optocoupler unit 201' in a side-mounted glue injection manner. This results in a large amount of white glue overflowing, requiring automatic glue removal equipment and a mold to remove excess residual glue and ribs. After removal, the unit is heated on a heating table before being encapsulated with black glue. Specifically, the side-mounted glue injection device 100' is first cut off by a runner removal device, and then the white glue removal equipment removes residual glue and ribs from the edge of the encapsulation body. The mold cutters used to remove residual glue and ribs need to be replaced periodically, and the unit must be heated on a heating table before black glue encapsulation, resulting in significant energy loss.

[0038] Figure 2 for Figure 1 An enlarged diagram of region aa in the middle, as shown below. Figure 2 As shown, the shaded areas around the optocoupler unit 201' are residual adhesive and ribs after the white glue encapsulation is completed. These require further processing using runner and adhesive removal equipment. With each die-cutting cycle, the wear on the mold cutters will increase, and the burrs around the white glue will become larger. When the burrs reach the control limit, the cutters need to be replaced. Because the punching around the white glue will leave a burr (generally within 0.1mm), it will affect the adhesion between the black and white glue, potentially leading to bulging or peeling of the black glue.

[0039] To address the aforementioned technical problems, this invention proposes a glue-dispensing device that can perform point-to-point glue dispensing to the optocoupler unit, preventing white glue overflow, simplifying the glue dispensing process, and improving glue dispensing efficiency. The technical solution of this invention will be described in detail below.

[0040] Figure 3 This is a schematic diagram of the structure of a glue dispensing device provided in an embodiment of the present invention. Figure 4 for Figure 3 A magnified diagram of the corresponding bb region, as shown below. Figure 3 and Figure 4 As shown, the dispensing device 100 is applied to an optocoupler device 200, which includes multiple arrayed optocoupler units 201; each optocoupler unit 201 includes a dispensing inlet 2011; the dispensing device 100 includes at least one dispensing module 101; the dispensing module 101 includes a main dispensing channel 1011, multiple branch channels 1012, multiple dispensing nozzles 1013, and positioning pins (not shown in the figure); the branch channels 1012 are respectively connected to the main dispensing channel 1011 and the dispensing nozzles 1013; the multiple branch channels 1012 are along a first direction (e.g., ... Figure 3 Arranged in the X direction shown, and all along the second direction (as shown in the figure). Figure 3 The first direction X intersects with the second direction Y. Along the second direction Y, multiple dispensing nozzles 1013 are arranged on the same branch channel 1012. The positioning pin is aligned with the positioning hole 202 in the optocoupler 200 so that the dispensing nozzle 1013 is aligned with the glue inlet 2011, so that the glue passes through the main channel 1011, the branch channel 1012 and the dispensing nozzle 1013 to the glue inlet 2011 in sequence.

[0041] Specifically, the optocoupler device 200 includes multiple optocoupler units 201 arranged in an array. Each optocoupler unit 201 includes a first lead frame and a second lead frame, which are stacked and disposed within a molding die. The first lead frame is used to house the light-receiving chip, and the second lead frame is used to house the light-emitting chip. Typically, the light-emitting chip is encapsulated in a silicone layer, and the silicone layer and the light-receiving polarizer are further encapsulated in white adhesive, which is then encapsulated in black adhesive.

[0042] Specifically, each optocoupler 201 unit includes a glue inlet 2011, which is located on the upper surface of the molding die. White glue is injected into the optocoupler unit 201 through the glue inlet 2011 to complete the white glue encapsulation.

[0043] Specifically, the glue injection device 100 comprises at least one glue injection module 101, i.e. the glue injection device comprises one glue injection module 101 or multiple glue injection modules 102, the multiple glue injection modules 102 can simultaneously inject glue into multiple light coupling units 201 in the same light coupling device 200, thus facilitating the miniaturization of the glue injection module 101 so as to be grabbed by the mechanical hand, on the other hand, it can prevent the glue injection module 101 from being broken during the process of grabbing the glue injection module by the mechanical hand.

[0044] Specifically, the glue injection module 101 comprises a main flow channel 1011, multiple sub-flow channels 1012, multiple glue injection nozzles 1013 and positioning needles; the sub-flow channels 1012 are respectively communicated with the main flow channel 1011 and the glue injection nozzles 1013, which is conducive to the circulation of the glue in the glue injection module 101. The multiple sub-flow channels 1012 are arranged along the first direction X and extend along the second direction Y; along the second direction Y, the multiple glue injection nozzles 1013 are arranged on the same sub-flow channel 1012, so that the glue enters from one end of the main flow channel, and then passes through the multiple sub-flow channels to reach each glue injection nozzle.

[0045] Specifically, the positioning needles are aligned with the positioning holes 202 in the light coupling device 200, so that the glue injection nozzles 1013 are aligned with the glue inlets 2011, i.e. the glue injection nozzles 1013 correspond to the glue inlets 2011, the glue injection nozzles 1013 are located directly above the glue inlets 2011, so that the glue passes through the main flow channel 1011, the sub-flow channel 1012 and the glue injection nozzle 1013 to the glue inlet 2011 in turn, thereby realizing point injection of each light coupling unit 201.

[0046] Compared with the lateral glue injection method in the prior art, the embodiment of the present application divides the glue by using the glue injection module, and injects the divided glue into each light coupling unit 201 in a point-to-point manner, so as to realize point injection of each light coupling unit 201. In this way, on the one hand, it can prevent the glue from overflowing to the periphery of the light coupling unit 201, thereby eliminating the need for automatic glue removal equipment and die cutting removal step for residual glue, i.e. the glue injection process is simplified, and the glue injection efficiency is high. On the other hand, since the residual glue does not need to be removed by cutting, the temperature of the light coupling unit 201 after white glue packaging can be maintained at 140-165℃, i.e. it does not need to be heated on the heating table, and can be directly black glue plastic packaging, thereby simplifying the light coupling packaging process, improving the packaging efficiency and reducing energy consumption.

[0047] It should be noted that in the prior art, after the white glue is injected into the photocoupler unit by the lateral injection process, the runner is removed, the residual glue is cut, the heating platform is heated, and the black glue packaging is performed, so that the total power consumed by the process is about 32.5kw, however, after the white glue is injected into the photocoupler unit by the point injection process, the black glue packaging can be directly performed, so that the total power consumed by the process is about 22kw, so it can be seen that the technical scheme provided by the embodiment of the present application can greatly reduce the power consumption, thereby reducing the energy consumption.

[0048] The injection device provided by the embodiment of the present application is used for positioning the needle and the positioning hole in the photocoupler, aligning the injection nozzle and the glue inlet, and making the glue pass through the main runner, the branch runner and the injection nozzle to the glue inlet in sequence, thereby realizing the point injection of each photocoupler unit, preventing the white glue from overflowing in the process of white glue plastic packaging of the photocoupler unit, simplifying the packaging process of the photocoupler unit, improving the packaging efficiency, reducing the cost and energy consumption.

[0049] Optionally, continuing to refer to Figure 3 The injection module 101 further comprises a buffer runner 1014; the buffer runner 1014 is located on the side of the branch runner 1012 away from the injection nozzle 1013, and a plurality of buffer runners 1014 are arranged on the branch runner 1012 along the second direction Y; the buffer runner 1014 is in communication with the branch runner 1012.

[0050] Specifically, the buffer runner 1014 is located on the side of the branch runner 1012 away from the injection nozzle 1013, that is, the injection nozzle 1013 and the buffer runner 1014 are respectively located on the upper and lower sides of the branch runner 1012, that is, the injection nozzle 1013 is located below the branch runner 1012, and the buffer runner 1014 is located above the branch runner 1012, and is respectively in communication with the branch runner 1012.

[0051] Specifically, since the glue first entering the branch runner 1012 from the main runner 1011 will harden, by arranging a plurality of buffer runners 1014 above the branch runner 1012 along the second direction Y, the cold glue with poor fluidity can be stored in the buffer runner 1014, and the glue with good fluidity enters the injection nozzle 1013, at this time, the buffer runner 1014 is equivalent to a cold material cavity. In addition, by arranging the buffer runner 1014, after the white glue is injected, when the injection device is opened, a part of the buffer runner 1014 pulls the back plate of the injection module 101, so that the injection module 101 is automatically separated from the photocoupler device 200.

[0052] Optionally, continuing to refer to Figure 3 In the same branch runner 1012, the orthogonal projection of the injection nozzle 1013 on the branch runner 1012 is staggered with the orthogonal projection of the buffer runner 1014 on the branch runner 1012.

[0053] Specifically, in the same flow channel 1012, a gap is included between the two adjacent glue injection nozzles 1013, and the orthographic projection of the glue injection nozzle 1013 on the flow channel 1012 is staggered with the orthographic projection of the buffer flow channel 1014 on the flow channel 1012, that is, the orthographic projection of the buffer flow channel 1014 on the flow channel 1012 overlaps with the orthographic projection of the gap between the two adjacent glue injection nozzles 1013 on the flow channel 1012, which is conducive to the poor flowability of the glue entering the buffer flow channel 1014, and the glue with good flowability flows into the glue injection nozzle 1013, thereby ensuring that the white glue injected into the glue inlet 2011 has good flowability, and thus the packaging effect of the optical coupling unit 201 can be improved.

[0054] Optionally, continuing to refer to Figure 3 , along the first direction X, the distance between the two adjacent glue injection nozzles 1013 in the two adjacent flow channels 1012 is equal to the distance between the two adjacent glue inlets 2011; along the second direction Y, the distance between the two adjacent glue injection nozzles 1013 in the same flow channel 1012 is equal to the distance between the two adjacent glue inlets 2011.

[0055] Specifically, along the first direction X, the distance between the two adjacent glue injection nozzles 1013 in the two adjacent flow channels 1012 is equal to the distance between the two adjacent glue inlets 2011, that is, the distance between the two glue injection nozzles 1013 arranged along the first direction X in the two adjacent flow channels 1012 is equal to the distance between the two adjacent glue inlets 2011 along the first direction X. Along the second direction Y, the distance between the two adjacent glue injection nozzles 1013 in the same flow channel 1012 is equal to the distance between the two adjacent glue inlets 2011, that is, the distance between the two adjacent glue injection nozzles 1013 along the second direction Y is equal to the distance between the two adjacent glue inlets 2011, which can ensure that the glue injection nozzle 1013 and the glue inlet 2011 are aligned after the positioning needle and the positioning hole 202 in the optical coupling device are aligned, preventing the glue from overflowing when the glue injection nozzle 1013 and the glue inlet 2011 are misaligned, and thus affecting the packaging effect of the optical coupling unit.

[0056] Optionally, continuing to refer to Figure 3 , the main flow channel 1011 includes a first main flow portion 11, a second main flow portion 12 and a third main flow portion 13 which are communicatively arranged; the first main flow portion 11 extends along the second direction Y; along the first direction X, the second main flow portion 12 and the third main flow portion 13 are respectively located on both sides of the first main flow portion 11 and extend along the first direction Y; the number of flow channels 1012 connected with the second main flow portion 12 is equal to the number of flow channels 1012 connected with the third main flow portion 13.

[0057] Specifically, the first main flow section 11 extends along the second direction Y; along the first direction X, the second main flow section 12 and the third main flow section 13 are located on both sides of the first main flow section 11, and both extend along the first direction Y, so that the shape of the main flow channel 1011 is similar to a "T" shape or a "+" shape.

[0058] Specifically, the number of branch channels 1012 connected to the second main flow section 12 is equal to the number of branch channels 1012 connected to the third main flow section 13. This is beneficial in two ways: firstly, it helps to ensure uniform force on the main flow section 1011 and prevents the number of branch channels on both sides of the main flow section 1011 from being different, which would cause the glue injection module 101 to tilt and thus affect the glue injection effect; secondly, it helps to ensure that the glue flow rate in each branch channel 1012 on both sides of the first main flow section 11 is consistent, thereby ensuring glue injection efficiency and glue injection effect.

[0059] Optional, continue to refer to Figure 3 The diversion channel 1012 includes a first diversion channel section 21 and a second diversion channel section 22 connected together. Along the second direction Y, the first diversion channel section 21 and the second diversion channel section 22 are located on both sides of the second main channel section 12 and the third main channel 13, respectively, and the number of injection nozzles 1013 connected to the first diversion channel section 21 is equal to the number of injection nozzles 1013 connected to the second diversion channel section 22.

[0060] Specifically, along the second direction Y, the first branch channel 21 and the second branch channel 22 are located on both sides of the second main channel 12 and the third main channel 13, respectively. That is, along the second direction Y, the first branch channel 21 and the second branch channel 22 are located on both sides of the second main channel 12 and are both connected to the second main channel 12, so that the colloid sequentially passes through the first main channel 11 and the second main channel 12 into the first branch channel 21 and the second branch channel 22, and then reaches the dispensing nozzle 1013. Similarly, along the second direction Y, the first branch channel 21 and the second branch channel 22 are located on both sides of the third main channel 13 and are both connected to the third main channel 13, so that the colloid sequentially passes through the first main channel 11 and the third main channel 13 into the first branch channel 21 and the second branch channel 22, and then reaches the dispensing nozzle 1013.

[0061] Specifically, the number of dispensing nozzles 1013 connected to the first branch channel 21 is equal to the number of dispensing nozzles 1013 connected to the second branch channel 22. This helps to ensure that the volume and time of the glue entering each dispensing nozzle 1013 through the first branch channel 21 and the second branch channel 22 are approximately the same, thereby ensuring dispensing efficiency and dispensing effect.

[0062] Optional, continue to refer toFigure 5 The main flow channel 1011, the branch flow channel 1012 and the glue injection nozzle 1013 are integrally arranged, so that the glue injection module 101 is a whole flow channel, which is simple in structure and convenient for the mechanical hand to grab the glue injection module 101.

[0063] Optionally, Figure 3 For Figure 3 The cross-sectional structure of the glue injection nozzle 1013 along the cross-sectional line A-A' is shown in FIG. 4, and the glue injection nozzle 1013 includes a glue storage groove 31 and a glue outlet 32. Figure 5 And Figure 3 As shown in FIG. 4, the glue storage groove 31 is in communication with the glue outlet 32 and the branch flow channel 1012, respectively, and the average diameter of the glue storage groove 31 is greater than the average diameter of the glue outlet 32.

[0064] Specifically, the glue injection nozzle 1013 includes a glue storage groove 31 and a glue outlet 32, and the glue storage groove 31 is in communication with the glue outlet 32 and the branch flow channel 1012, respectively, that is, the glue flows from the branch flow channel 1012 and the glue storage groove 31 to the glue outlet 32 in turn, so that the glue storage groove 31 can store the glue, thereby ensuring the uniformity of the glue flowing out of the glue outlet 32, and being conducive to ensuring the packaging effect of the optical coupling structure.

[0065] Specifically, since the cross-sectional shape of the glue storage groove 31 can be semicircular or trapezoidal, etc., the average diameter is used to describe the size of the glue storage groove 31. For example, the average diameter of the glue storage groove 31 can be understood as the average value of the maximum diameter and the minimum diameter of the glue storage groove 31. Since the cross-sectional shape of the glue outlet 32 can be trapezoidal, etc., the average diameter is used to describe the size of the glue outlet 32. For example, the average diameter of the glue outlet 32 can be understood as the average value of the maximum diameter and the minimum diameter of the glue outlet 32. By setting the average diameter of the glue storage groove 31 to be greater than the average diameter of the glue outlet 32, the uniformity of the glue flowing out of the glue outlet 32 can be ensured, and the packaging effect of the optical coupling structure can be ensured.

[0066] Optionally, referring back to Figure 6 , the average diameter of the glue outlet 32 is less than or equal to the diameter of the glue inlet 2011, so that the glue flowing out of the glue outlet 32 can smoothly flow into the glue inlet 2011, preventing the glue from overflowing from the glue inlet 2011, thereby affecting the packaging effect of the optical coupling unit.

[0067] Based on the same inventive concept, the present application also provides a glue injection method, which is realized by using the glue injection device described in the above embodiments, Figure 6 A flowchart of a glue injection method provided by the present application is shown in FIG. 5, which includes the following steps: Figure 3

[0068] ​S101, placing at least one glue injection module on one side of the optical coupling device; the glue injection module comprises a main flow channel, a plurality of branch flow channels, a plurality of glue injection nozzles, and a positioning needle; the branch flow channels are respectively communicated with the main flow channel and the glue injection nozzles; the plurality of branch flow channels are arranged along a first direction and extend along a second direction; the first direction intersects the second direction; along the second direction, the plurality of glue injection nozzles are arranged on the same branch flow channel.

[0069] Specifically, with reference to Figure 3 , the glue injection device 100 comprises at least one glue injection module 101, i.e., the glue injection device comprises one glue injection module 101 or a plurality of glue injection modules 102; the plurality of glue injection modules 102 can simultaneously inject glue into a plurality of optical coupling units 201 in the same optical coupling device 200, which is conducive to the miniaturization of the glue injection module 101 so as to be grasped by the mechanical hand, and on the other hand, can prevent the glue injection module 101 from being broken during the process of grasping the glue injection module by the mechanical hand.

[0070] Specifically, the glue injection module 101 comprises a main flow channel 1011, a plurality of branch flow channels 1012, a plurality of glue injection nozzles 1013, and a positioning needle; the branch flow channels 1012 are respectively communicated with the main flow channel 1011 and the glue injection nozzles 1013, which is conducive to the circulation of the glue in the glue injection module 101. The plurality of branch flow channels 1012 are arranged along a first direction X and extend along a second direction Y; along the second direction Y, the plurality of glue injection nozzles 1013 are arranged on the same branch flow channel 1012, so that the glue enters from one end of the main flow channel and then passes through the plurality of branch flow channels to reach each glue injection nozzle.

[0071] S102, aligning the positioning needle of the glue injection module with the positioning hole in the optical coupling unit, so that the glue injection nozzle is aligned with the glue inlet, and the glue sequentially passes through the main flow channel, the branch flow channel, and the glue injection nozzle to the glue inlet.

[0072] Specifically, with reference to ​ , the positioning needle is aligned with the positioning hole 202 in the optical coupling device 200, so that the glue injection nozzle 1013 is aligned with the glue inlet 2011, i.e., the glue injection nozzle 1013 corresponds to the glue inlet 2011, and the glue injection nozzle 1013 is located directly above the glue inlet 2011, so that the glue sequentially passes through the main flow channel 1011, the branch flow channel 1012, and the glue injection nozzle 1013 to the glue inlet 2011, thereby realizing point-type glue injection for each optical coupling unit 201.

[0073] It should be noted that after the white glue injection is completed, the injection module is automatically separated from the light coupling unit on the lead frame with the mold opening action, without the need for additional action. There is no residual glue around the light coupling unit on the lead frame, only a small glue inlet, and the subsequent black glue packaging will completely wrap the glue inlet, without the need for cutting the flow channel, the residual glue around the middle ribs and particles, and the need for the equipment to be transferred, so that the temperature of the light coupling unit after white glue packaging is maintained between 140 DEG C and 165 DEG C, that is, without the need for heating on the heating table, the black glue plastic packaging can be directly performed, thereby simplifying the light coupling packaging process, improving the packaging efficiency and reducing energy consumption. In addition, by using the injection process, the control of the white glue burr around the light coupling unit can be realized, so that the black glue wrapping wall thickness is guaranteed, thereby improving the product quality and further improving the competitiveness of the product.

[0074] The injection method provided by the embodiment of the present application places at least one injection module on one side of the light coupling device, aligns the positioning needle with the positioning hole in the light coupling, so that the injection nozzle is aligned with the glue inlet, and the glue passes through the main flow channel, the branch flow channel and the injection nozzle to the glue inlet in sequence, thereby realizing point injection of each light coupling unit, so that white glue overflow during white glue plastic packaging of the light coupling unit can be prevented, thereby simplifying the packaging process of the light coupling unit, improving the packaging efficiency, and reducing the cost and energy consumption.

[0075] Note that the above is only the preferred embodiment of the present application and the technical principle applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, re-adjustments, mutual combinations and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. An injection device for an optical coupling device, the optical coupling device comprising a plurality of arrayed optical coupling units, each of the optical coupling units comprising an inlet; comprising: at least one injection module; the injection module comprising a main flow channel, a plurality of sub-flow channels, a plurality of injection nozzles, and a positioning needle; the sub-flow channels respectively communicating with the main flow channel and the injection nozzles; the plurality of sub-flow channels being arranged along a first direction and each extending along a second direction; the first direction intersecting the second direction; along the second direction, the plurality of injection nozzles are arranged on the same sub-flow channel; the positioning needle aligning with a positioning hole in the optical coupling device to align the injection nozzles with the inlets, so that a glue passes through the main flow channel, the sub-flow channel, and the injection nozzle to the inlet in sequence. characterized in that the injection module further comprising a buffer flow channel; the buffer flow channel being located on a side of the sub-flow channel away from the injection nozzle, and along the second direction, a plurality of the buffer flow channels are arranged on the sub-flow channel; the buffer flow channel communicating with the sub-flow channel. in the same sub-flow channel, a normal projection of the injection nozzle on the sub-flow channel and a normal projection of the buffer flow channel on the sub-flow channel are staggered. along the first direction, a distance between two adjacent injection nozzles in two adjacent sub-flow channels is equal to a distance between two adjacent inlets; along the second direction, a distance between two adjacent injection nozzles in the same sub-flow channel is equal to a distance between two adjacent inlets. the main flow channel comprising a first main flow portion, a second main flow portion, and a third main flow portion arranged in communication; the first main flow portion extending along the second direction; along the first direction, the second main flow portion and the third main flow portion are respectively located on two sides of the first main flow portion and each extend along the first direction; the number of sub-flow channels communicating with the second main flow portion is equal to the number of sub-flow channels communicating with the third main flow portion.

2. The apparatus of claim 1, wherein the sub-flow channel comprising a first sub-flow portion and a second sub-flow portion arranged in communication; along the second direction, the first sub-flow portion and the second sub-flow portion are respectively located on two sides of the second main flow portion and two sides of the third main flow channel, and the number of injection nozzles communicating with the first sub-flow portion is equal to the number of injection nozzles communicating with the second sub-flow portion. the main flow channel, the sub-flow channel, and the injection nozzle are integrally arranged.

3. The apparatus of claim 2, wherein the injection nozzle comprising a glue storage groove and a glue outlet; the glue storage groove respectively communicating with the glue outlet and the sub-flow channel, and the average diameter of the glue storage groove is greater than the average diameter of the glue outlet.

4. The apparatus of claim 1, wherein the average diameter of the glue outlet is less than or equal to the diameter of the inlet.

5. The apparatus of claim 1, wherein the injection method comprising: ​ ​ 6. The apparatus of claim 5, wherein ​ ​ 7. The apparatus of claim 1, wherein ​ 8. The apparatus of claim 1, wherein ​ ​ 9. The apparatus of claim 8, wherein, ​ 10. A method of injecting glue, implemented by using the glue injection device according to any one of claims 1-9, characterized in that, ​ At least one glue injection module is placed on one side of the light coupling device; the glue injection module comprises a main flow channel, a plurality of branch flow channels, a plurality of glue injection nozzles and a positioning needle; the branch flow channels are respectively communicated with the main flow channel and the glue injection nozzles; the plurality of branch flow channels are arranged along a first direction and extend along a second direction; the first direction intersects with the second direction; along the second direction, the plurality of glue injection nozzles are arranged on the same branch flow channel; The positioning needle of the glue injection module is aligned with a positioning hole in the light coupling unit, so that the glue injection nozzle is aligned with the glue inlet, and the glue passes through the main flow channel, the branch flow channel and the glue injection nozzle to the glue inlet in sequence.

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