Automatic glue adding device of die bonder

Abstract

The utility model discloses an automatic glue adding device of a die bonder, and particularly relates to the glue adding structure field of the die bonder, the automatic glue adding device comprises a glue adding mechanism, a glue barrel, a push plate, a screw rod and a glue outlet head, the glue barrel is installed on a rack, the glue barrel is communicated with the glue outlet head, the push plate is arranged in an inner cavity of the glue barrel in a sealed and sliding manner, the push plate is rotatably connected with the screw rod, and the screw rod is connected with the glue outlet head. The lead screw is in threaded transmission connection with a port of the glue barrel; the dredging mechanism comprises a longitudinal displacement unit, a dredging unit and a motor, the longitudinal displacement unit is used for driving the dredging unit and the motor to synchronously move up and down, and a middle-position cleaning strip and a side-position cleaning strip in the dredging unit are used for making contact with the inner wall and the outer wall of the glue outlet head and are driven by the motor to rotate by being attached to the inner wall and the outer wall of the glue outlet head; the accuracy of the glue adding amount is improved mainly through the quantitative adjustment type glue adding mechanism, the influence of redundant glue liquid on glue adding of the glue outlet head is reduced through the rotary glue liquid cleaning means, and the glue adding accuracy is further improved.

Description

Technical Field

[0001] The utility model relates to the field of glue adding structures of a crystal bonding machine, and more specifically, to an automatic glue adding device for a crystal bonding machine. Background Art

[0002] The die bonding process in the field of semiconductor packaging is a process that fixes the bottom of the chip on a bracket with heat dissipation glue or conductive glue and then bakes it. During the die bonding process, a certain amount of glue needs to be added continuously to ensure that the bottom of the chip is sufficient. Usually, glue is added manually, and the amount and time of glue injection are manually controlled. It is often not added in time or too much glue is added. Failure to add glue in time will result in insufficient glue or no glue. Adding too much glue will result in glue waste, glue dripping on the surface of the chip and bracket, and other undesirable phenomena, affecting the LED packaging effect. The reason is that the SMD die bonding glue adding method directly affects the process of die bonding glue dispensing. Utility Model Content

[0003] In order to overcome the above-mentioned defects of the prior art, an embodiment of the utility model provides an automatic glue adding device for a die bonding machine to solve the above-mentioned problems.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an automatic glue adding device for a crystal bonding machine, including a glue adding mechanism, including a glue barrel, a push plate, a screw and a glue discharging head, the glue barrel is installed on a frame, the glue barrel and the glue discharging head are connected, the push plate is closed and slidably placed in the inner cavity of the glue barrel, the push plate and the screw are rotatably connected, and the screw and the port of the glue barrel are threadedly connected; a dredging mechanism, including a longitudinal displacement unit, a dredging unit and a motor, the longitudinal displacement unit is used to drive the dredging unit and the motor to move up and down synchronously, the middle cleaning strip and the side cleaning strip in the dredging unit are used to contact the inner and outer walls of the glue discharging head, and rotate in contact with the inner and outer walls of the glue discharging head under the drive of the motor.

[0005] In a preferred embodiment, the inner cavity of the glue discharge head is connected to an external glue source through a glue feeding tube, the connection point between the glue feeding tube and the glue discharge head is located between the push plate and the glue discharge head, and a one-way valve is installed in the glue feeding tube.

[0006] In a preferred embodiment, the unblocking unit includes a solvent barrel, a cover plate, a center cleaning bar and a side cleaning bar. The solvent barrel is driven up and down by the longitudinal displacement unit. The solvent barrel and the cover plate are elastically connected. The center cleaning bar is inserted into the center of the cover plate, and the side cleaning bar is inserted into the cover plate and evenly distributed around the center cleaning bar.

[0007] In a preferred embodiment, an elastic tube is provided between the cover plate and the solvent barrel, one end of the elastic tube is fixedly connected to the cover plate and the other end is detachably connected to the solvent barrel.

[0008] In a preferred embodiment, a plurality of slideways are provided in the cover plate, each of which is elastically slidably connected to a slider, and the side cleaning strip is inserted into the slideway.

[0009] In a preferred embodiment, a plurality of limiting rings are slidably connected in the solvent barrel, and the side cleaning strips are inserted into corresponding limiting rings. The limiting rings and the solvent barrel are connected by a sealing cloth, and the sealing cloth and the solvent barrel are filled with solvent.

[0010] In a preferred embodiment, the portion of the side cleaning strip located above the cover plate is arranged obliquely.

[0011] In a preferred embodiment, the longitudinal displacement unit includes a vertical slide rail and a bearing arm plate, the vertical slide rail is fixedly connected to the frame, a cylinder is installed on the vertical slide rail, the cylinder body of the cylinder is fixed to the vertical slide rail, the telescopic rod located in the cylinder body is fixedly connected to the bearing arm plate, the solvent barrel is rotatably connected to the bearing arm plate, and the motor housing is fixed to the bearing arm plate.

[0012] Technical effects and advantages of the utility model:

[0013] The utility model mainly improves the accuracy of glue adding amount through the quantitatively adjustable glue adding mechanism, and also reduces the influence of excess glue on the glue adding of the glue outlet head through the rotating glue cleaning means, thereby further improving the accuracy of glue adding. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the technical solution of the present utility model and constitute a part of the present utility model. The embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation on the present utility model.

[0015] Figure 1 The utility model is a structural diagram of an automatic glue adding device for a crystal bonding machine.

[0016] Figure 2 It is a front view of an automatic glue adding device for a crystal bonding machine according to the utility model.

[0017] Figure 3 It is a structural diagram of the load-bearing arm plate of the utility model.

[0018] Figure 4 This is a diagram of the internal structure of the dredging unit of the utility model.

[0019] The accompanying drawings are marked as follows: 1. glue adding mechanism; 11. glue barrel; 12. push plate; 13. screw rod; 14. glue outlet head; 15. glue delivery hose; 2. unblocking mechanism; 21. longitudinal displacement unit; 211. vertical slide rail; 212. load-bearing arm plate; 22. unblocking unit; 221. solvent barrel; 222. cover plate; 223. center cleaning strip; 224. limit ring; 225. side cleaning strip; 23. motor. DETAILED DESCRIPTION

[0020] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that the description of the present disclosure will be more comprehensive and complete and the concepts of the example embodiments will be fully conveyed to those skilled in the art. The accompanying drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and thus their repeated description will be omitted.

[0021] In addition, the described features, structures or characteristics may be combined in one or more example embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the example embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced while omitting one or more of the specific details, or other methods, components, steps, etc. may be adopted. In other cases, well-known structures, methods, implementations or operations are not shown or described in detail to avoid obscuring various aspects of the present disclosure.

[0022] The utility model mainly improves the accuracy of glue addition through a quantitatively adjustable glue adding mechanism, and also reduces the influence of solidified glue on the glue addition of a glue outlet head (14) through a rotating glue liquid cleaning means, thereby further improving the accuracy of glue addition.

[0023] Among them, for non-stubborn or partially cured glue, you can try using conventional solvents such as alcohol, thinner, acetone or alcohol.

[0024] Example 1

[0025] like Figure 1-Figure 4 The utility model provides an automatic glue adding device for a crystal bonding machine, wherein the glue adding mechanism 1 mainly includes a glue barrel 11, a push plate 12, a screw 13, a glue outlet head 14 and a glue feeding tube 15. The glue barrel 11 is fixed on an operating platform of a frame. The operating platform is a support member that can move linearly or rotate. The operating platform can be used to drive the glue adding mechanism 1 to perform a combined vertical and horizontal movement above the glue disc. The design of the operating platform is a prior art and will not be described in detail in this embodiment.

[0026] The push plate 12 slides up and down against the inner wall of the glue barrel 11, and the outer end surface of the push plate 12 is rotatably connected to the screw rod 13, and the screw rod 13 is threadedly connected to the top part of the glue barrel 11, and the glue barrel 11 and the glue head 14 are connected. In this way, the user rotates the screw rod 13, and the screw rod 13 drives the push plate 12 to move up and down in the inner cavity of the glue barrel 11 to adjust the position of the push plate 12 in the glue barrel 11, so that the push plate 12 squeezes the glue in the glue barrel 11 from the glue head 14, and the squeezed glue drips onto the glue disc, thereby achieving the purpose of adding glue to the glue disc in time.

[0027] In specific applications, the screw rod 13 is fixedly connected to the output shaft of an external motor, and the motor is controlled by an external controller to run at a certain speed within a certain period of time to accurately control the displacement of the push plate 12, so that the amount of glue squeezed out from the glue outlet 14 can be accurately controlled, and the accuracy of glue addition can be improved, which solves the problems of excessive glue, overflowing glue, insufficient glue, etc. caused by failure to add glue in time or manual addition of glue during the operation, as well as the waste caused by adding too much glue. That is, accurate timing through software and hardware can ensure timely addition of glue. There is a scale display on the glue barrel 11. After adjusting to the appropriate amount of glue, the conveying distance of the screw rod 13 is fixed to ensure that each addition is a fixed amount of glue.

[0028] For example, the software running time (excluding various pause standby times) is controlled by an external controller, and 2H (adjustable) is set. When the 2H software controls the hose, a force action is applied from top to bottom to transport glue to the glue tray through the machine, which solves the problem of not adding glue in time or unstable manual addition of glue during the operation, and avoids waste due to adding too much glue.

[0029] Preferably, the inner cavity of the glue barrel 11 is connected to the external glue source through the glue feeding tube 15. The external glue source is a glue storage barrel with sufficient glue storage capacity. A one-way valve is installed in the glue feeding tube 15. When the push plate 12 moves upward, the glue outlet 14 is sealed, and the external glue source will use air pressure to press the glue into the glue barrel 11 to achieve the purpose of automatically filling the glue. The specific means of sealing the glue outlet 14 can be: a one-way valve is set on the side of the glue outlet 14, and only the glue is allowed to be output from the glue outlet 14 from the inside to the outside. When the external glue source fills the glue barrel 11 with glue, the one-way valve in the glue outlet 14 is closed.

[0030] In the past, adding glue required stopping the machine, but the glue adding mechanism 1 adds glue regularly during the operation without stopping the machine.

[0031] Example 2

[0032] like Figure 1-Figure 4 On the basis of Example 1, in order to solve the problem that the glue head 14 is blocked by the fixed glue liquid, affecting the normal glue discharge of the glue head 14, the following design is provided:

[0033] The dredging mechanism 2 includes a longitudinal displacement unit 21, a dredging unit 22 and a motor 23. The dredging unit 22 and the motor 23 are both installed on the longitudinal displacement unit 21. The longitudinal displacement unit 21 controls the movement to the glue dispensing head 14 and cleans the glue liquid fixed on the glue dispensing head 14.

[0034] The dredging unit 22 includes a solvent barrel 221, a cover plate 222, a center cleaning strip 223 and a side cleaning strip 225. An elastic tube is arranged between the cover plate 222 and the solvent barrel 221. One end of the elastic tube is fixedly connected to the cover plate 222 and the other end is detachably connected to the solvent barrel 221. The detachable connection can be by means of a snap-fit ​​means or by means of a magnetic attraction means. In this embodiment, the magnetic attraction means is preferably used.

[0035] Magnetic sheets that can be magnetically attracted to each other are fixed on the opposite surfaces of the elastic tube and the solvent barrel 221. This method can easily install the cover plate 222 on the solvent barrel 221, and also facilitates the subsequent separation of the cover plate 222 and the solvent barrel 221, so as to facilitate the subsequent pouring of solvent into the solvent barrel 221.

[0036] A middle cleaning strip 223 is inserted at the middle position of the cover plate 222, and a plurality of side cleaning strips 225 are inserted at the other positions, and the side cleaning strips 225 are evenly distributed around the middle cleaning strip 223; the middle cleaning strip 223 is used to be inserted into the interior of the glue dispensing head 14 to clean the glue liquid in the glue dispensing head 14, and the side cleaning strips 225 are used to contact the outer wall of the glue dispensing head 14 and clean the glue liquid on the outer wall.

[0037] When in use, the center cleaning strip 223 and the side cleaning strip 225 soaked with solvent are loaded into the cover plate 222, and the longitudinal displacement unit 21 drives the center cleaning strip 223 and the side cleaning strip 225 to move to the glue dispensing head 14, and the motor 23 is turned on to drive the solvent barrel 221 and the center cleaning strip 223 and the side cleaning strip 225 thereon to rotate, so as to remove the glue on the inner and outer walls of the glue dispensing head 14 to a certain extent, and the glue can be in a solidified state or in a non-solidified state.

[0038] Example 3

[0039] like Figure 1-Figure 4 On the basis of Example 1 and Example 2, when the longitudinal displacement unit 21 drives the middle cleaning bar 223 and the side cleaning bar 225 to move upward, the designed side cleaning bar 225 can move along the inclined outer wall of the glue discharge head 14.

[0040] The cover plate 222 is provided with a plurality of slideways, in which a slider is elastically slidably connected, and the slider is detachably connected to the side cleaning strip 225. Correspondingly, a plurality of limiting rings 224 are slidably connected inside the solvent barrel 221, and the number of limiting rings 224 is equal to the number of sliders, and the limiting rings 224 are also detachably connected to the corresponding side cleaning strips 225.

[0041] That is, a sliding block and a limiting ring 224 are sleeved on a side cleaning strip 225 .

[0042] The clamping force between the side cleaning strip 225 and the slider is greater than the clamping force between the limiting ring 224 and the side cleaning strip 225. In this way, the user can repeatedly press the cover plate 222 to allow the cover plate 222 to drive the side cleaning strip 225 to move up and down repeatedly in the limiting ring 224, thereby improving the absorption rate of the solvent in the limiting ring 224 by the side cleaning strip 225, so that a certain amount of solvent can always be retained in the middle cleaning strip 223.

[0043] Similarly, the engagement force between the middle cleaning strip 223 and the cover plate 222 should also be greater than the engagement force between the middle cleaning strip 223 and the limiting ring 224 .

[0044] It should be noted that the center cleaning bar 223 and the side cleaning bar 225 are both made of materials with high solvent absorption capacity, and the selected materials are specifically selected according to the corresponding solvents. Because the solvent supply ends of the center cleaning bar 223 and the side cleaning bar 225 are at the bottom, when the amount of solvent in the center cleaning bar 223 and the side cleaning bar 225 after repeated use is low, the center cleaning bar 223 and the side cleaning bar 225 are allowed to contact the solvent source below, and the solvent can be quickly guided to the upper part of the center cleaning bar 223 and the side cleaning bar 225 by penetration, which is convenient for the subsequent cleaning of the glue on the glue head 14.

[0045] In combination with Example 2 and Example 3, the longitudinal displacement unit 21 includes a vertical slide rail 211 and a bearing arm plate 212, the solvent barrel 221 is rotatably connected to the bearing arm plate 212, the motor 23 is installed on the bearing arm plate 212, and the bearing arm plate 212 is slidably connected to the vertical slide rail 211. A cylinder is installed in the vertical slide rail 211, the cylinder body is fixed on the vertical slide rail 211, the telescopic rod slidably connected to the cylinder body is fixedly connected to the bearing arm plate 212, and the external controller controls the operation of the cylinder.

[0046] Preferably, the upper portion of the side cleaning strip 225 can be designed to be inclined along the outer wall of the glue dispensing head 14, so that the entire upper portion of the side cleaning strip 225 can rotate in contact with the outer wall of the glue dispensing head 14, thereby improving the cleaning effect of the side cleaning strip 225 on the outer wall of the glue dispensing head 14.

[0047] In summary, here is a brief description of the operation process of the entire program:

[0048] The glue adding mechanism 1 is first moved to the top of the glue disc under the control of the operating platform, and the glue liquid in the glue barrel 11 is squeezed into the glue disc by driving the screw rod 13 to rotate. After the process of discharging the glue liquid is completed, the operating platform drives the glue adding mechanism 1 to move to the top of the dredging mechanism 2, and the external controller controls the cylinder to drive the bearing arm plate 212 to move upward along the vertical slide rail 211, so that the middle cleaning strip 223 is inserted into the glue discharge head 14, and the corresponding side cleaning strip 225 is attached to the outer wall of the glue discharge head 14. The external controller controls the motor 23 to drive the dredging unit 22 to rotate, and the rotating middle cleaning strip 223 and side cleaning strip 225 evenly apply the solvent to the inner and outer walls of the glue discharge head 14, so as to achieve the purpose of removing the solidified glue liquid and dredging the glue discharge head 14. Then the operating platform moves the glue adding mechanism 1 to the top of the glue disc again, and this process is repeated.

[0049] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

[0050] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0051] Secondly: In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0052] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. An automatic glue adding device for a die-bonding machine, characterized in that include: The glue adding mechanism (1) comprises a glue barrel (11), a push plate (12), a screw (13) and a glue discharging head (14); the glue barrel (11) is mounted on a frame, the glue barrel (11) and the glue discharging head (14) are connected, the push plate (12) is slidably placed in the inner cavity of the glue barrel (11), the push plate (12) and the screw (13) are rotatably connected, and the screw (13) and the port of the glue barrel (11) are threadedly connected; The dredging mechanism (2) comprises a longitudinal displacement unit (21), a dredging unit (22) and a motor (23), wherein the longitudinal displacement unit (21) is used to drive the dredging unit (22) and the motor (23) to move up and down synchronously, and the middle cleaning strip (223) and the side cleaning strip (225) in the dredging unit (22) are used to contact the inner and outer walls of the glue dispensing head (14), and rotate in contact with the inner and outer walls of the glue dispensing head (14) under the drive of the motor (23).

2. The automatic glue adding device for a die bonder according to claim 1, characterized in that: The inner cavity of the glue discharge head (14) is connected to an external glue source via a glue feeding pipe (15); the connection point between the glue feeding pipe (15) and the glue discharge head (14) is located between the push plate (12) and the glue discharge head (14); and a one-way valve is installed in the glue feeding pipe (15).

3. The automatic glue adding device for a die bonder according to claim 1, characterized in that: The dredging unit (22) comprises a solvent barrel (221), a cover plate (222), a middle cleaning bar (223) and side cleaning bars (225); the solvent barrel (221) is driven by the longitudinal displacement unit (21) to move up and down; the solvent barrel (221) and the cover plate (222) are elastically connected; the middle cleaning bar (223) is inserted into the center of the cover plate (222); and the side cleaning bars (225) are inserted into the cover plate (222) and are evenly distributed around the middle cleaning bar (223).

4. The automatic glue adding device for a die bonder according to claim 3, characterized in that: An elastic tube is arranged between the cover plate (222) and the solvent barrel (221), one end of the elastic tube is fixedly connected to the cover plate (222) and the other end is detachably connected to the solvent barrel (221).

5. The automatic glue adding device for a die bonder according to claim 3, characterized in that: A plurality of slideways are provided in the cover plate (222), each of which is elastically slidably connected to a sliding block, and the side cleaning strip (225) is inserted into the slideway.

6. The automatic glue adding device for a die bonder according to claim 5, characterized in that: A plurality of limiting rings (224) are slidably connected in the plurality of solvent barrels (221); the side cleaning strips (225) are inserted into corresponding limiting rings (224); the limiting rings (224) and the solvent barrels (221) are connected via a sealing cloth; the sealing cloth and the solvent barrels (221) are filled with solvent.

7. The automatic glue adding device for a die bonder according to claim 5, characterized in that: The portion of the side cleaning strip (225) located above the cover plate (222) is arranged obliquely.

8. The automatic glue adding device for a die bonder according to claim 1, characterized in that: The longitudinal displacement unit (21) comprises a vertical slide rail (211) and a bearing arm plate (212); the vertical slide rail (211) is fixedly connected to a frame; a cylinder is mounted on the vertical slide rail (211); a cylinder body of the cylinder is fixed to the vertical slide rail (211); a telescopic rod located in the cylinder body is fixedly connected to the bearing arm plate (212); a solvent barrel (221) is rotatably connected to the bearing arm plate (212); and a housing of a motor (23) is fixed to the bearing arm plate (212).

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