Crystal grain pushing device of die bonder

Abstract

The utility model discloses a crystal grain pushing device of a die bonder, which comprises an ejector pin assembly and a base assembly, the ejector pin assembly comprises an ejector pin seat, a pushing rod and an ejector pin, the pushing rod can be arranged in a hollow cavity of the ejector pin seat in a sliding and penetrating manner along the axial direction of the pushing rod, and the lower part of the ejector pin is detachably arranged at the upper part of the pushing rod; the base assembly comprises a mounting seat, a pushing block arranged in the mounting seat and capable of moving up and down, and a pushing mechanism used for driving the pushing block to do reciprocating rectilinear motion in the up-down direction, the ejector pin seat is detachably connected with the mounting seat, and when the ejector pin seat is fixedly connected to the mounting seat, the ejector pin seat is fixedly connected with the mounting seat. The lower portion of the pushing rod abuts against the pushing block. When the ejector pin needs to be replaced, the ejector pin can be rapidly replaced by directly disassembling and replacing the whole ejector pin assembly, the adjusting time after replacement is saved, the production rhythm cannot be paused or disordered, and therefore the overall production efficiency can be improved.

Description

Technical Field

[0001] This utility model relates to the field of semiconductor manufacturing and processing, specifically to a die pushing device for a die bonder. Background Technology

[0002] After chips are cut into dies during manufacturing, these dies, numbering in the thousands or even tens of thousands, are typically adhered to a blue film. The blue film serves as a carrier, ensuring the dies are transferred while maintaining an orderly arrangement. Die picking requires the coordinated action of ejector pins and nozzles. Specifically, the ejector pins first push the die off the blue film, and then the nozzles pick it up and transfer it to the mounting location. During this process, the ejector pins need to reciprocate at a high frequency with small displacements, placing high demands on the pushing device. Furthermore, the ejector pins are prone to damage after prolonged processing and require replacement. Current technologies typically only replace the ejector pins, which are usually small and inconvenient to install, requiring significant time for setup after installation, thus impacting production schedules. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a new die-pushing device for a die bonder.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a die pushing device for a die bonder, the pushing device comprising:

[0005] A ejector assembly includes an ejector seat, a push rod, and an ejector pin. The ejector seat has a hollow cavity, and the push rod is slidably inserted into the hollow cavity along its own axis. The lower part of the ejector pin is detachably mounted on the upper part of the push rod. The upper part of the ejector seat has a guide hole through which the ejector pin slides along its axis. An elastic element is provided between the ejector seat and the push rod to drive the push rod to move downward.

[0006] The base assembly includes a mounting base, a push block movable up and down in the mounting base, and a push mechanism for driving the push block to reciprocate linearly in the up and down direction.

[0007] The ejector pin seat is detachably connected to the mounting base, and when the ejector pin seat is fixedly connected to the mounting base, the lower part of the push rod abuts against the push block.

[0008] Preferably, the upper part of the push block is provided with an alignment groove, and the lower part of the push rod can be fitted into the alignment groove.

[0009] Preferably, the pushing mechanism includes a first cam and a first motor that drives the first cam to rotate. The first cam is located below the pushing block, and the outer peripheral surface of the first cam abuts against the bottom of the pushing block.

[0010] In some embodiments, the first cam is a first eccentric wheel, and the first rotation center line of the first eccentric wheel has a distance greater than 0 from the axis of the first eccentric wheel.

[0011] In some embodiments, the mounting base has a mounting cavity, the first cam and the push block are both disposed in the mounting cavity, and when the ejector seat is connected to the mounting base, the lower part of the ejector seat is at least partially inserted into the mounting cavity.

[0012] In some embodiments, the lower part of the ejector seat has a limiting platform and a snap-fit ​​portion located below the limiting platform. When the ejector seat is connected to the mounting base, the limiting platform is supported on the mounting base, and the snap-fit ​​portion is inserted into the mounting cavity. A detachable connection structure is provided between the snap-fit ​​portion and / or the limiting platform and the mounting base.

[0013] Preferably, the base assembly further includes a base, and the mounting seat is vertically height-adjustable on the base.

[0014] In some embodiments, an elastic component is provided between the mounting base and the base to provide the elastic force required for the mounting base to move upward relative to the base; the base is also provided with an adjustment mechanism, the adjustment mechanism including a second cam and a second motor that drives the second cam to rotate, the outer peripheral surface of the second cam abutting downward against the mounting base.

[0015] In some embodiments, the mounting base includes a base body having a hollow cylindrical shape and a fixing block fixed to the bottom of the base body, the elastic component being disposed below the fixing block and between it and the base, and the second cam being disposed in the base body.

[0016] In some embodiments, a linear bearing is provided between the base and the seat body; and / or, the second cam is a second eccentric wheel, and the second rotation center line of the second eccentric wheel has a distance greater than 0 from the axis of the second eccentric wheel.

[0017] Due to the application of the above technical solution, this utility model has the following advantages: The die pushing device of the die bonder of this utility model is divided into two main parts: a push pin assembly and a base assembly. The push pin seat of the push pin assembly and the mounting base of the base assembly are detachably connected, and the push pin is pre-adjusted and installed on the push rod. When it is necessary to replace the push pin, the push pin seat is removed from the mounting base, and the entire push pin assembly can be detached from the base assembly. Then, the replacement push pin assembly is installed on the base assembly, which can realize the quick replacement of the push pin. The position and accuracy of the push pin in the push pin assembly are pre-adjusted. Therefore, after replacement, it is not necessary to spend a lot of time adjusting, saving adjustment time after replacement, so that the production rhythm will not be interrupted or disrupted, thereby improving the overall production efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the grain pushing device of this utility model, wherein the push pin assembly and the base assembly are separated from each other;

[0020] Figure 2 for Figure 1 A side view of the grain pushing device;

[0021] Figure 3 This is a schematic diagram of the overall structure of the grain pushing device of this utility model, wherein the push pin assembly and the base assembly are connected to each other, and the push pin is in the lowest position;

[0022] Figure 4 for Figure 3 A longitudinal section diagram;

[0023] Figure 5 for Figure 4 Enlarged diagram of section A in the middle;

[0024] Figure 6 for Figure 4 A schematic diagram of the side view structure;

[0025] Figure 7 For along Figure 6 Schematic diagram of the cross-sectional structure along the BB direction;

[0026] Figure 8 This is a schematic diagram of the overall structure of the grain pushing device of this utility model, wherein the push pin assembly and the base assembly are connected to each other, and the push pin is at the highest position;

[0027] Figure 9 for Figure 8 A longitudinal section diagram;

[0028] Figure 10 for Figure 9 Enlarged diagram of section C;

[0029] In the attached diagrams above:

[0030] 100. Ejector pin assembly; 200. Base assembly; 1. Ejector pin seat; 101. Limiting platform; 102. Snap-fit ​​part; 103. Limiting groove; 104. Guide hole; 2. Ejector pin; 3. Push rod; 301. Limiting protrusion; 4. Base; 5. Mounting seat; 51. Seat body; 52. Fixing block; 6. First cam; 7. Second cam; 8. First motor; 81. First output shaft; 9. Second motor; 91. Second output shaft; 10. Push block; 10a. Alignment groove; 11. Elastic element; 12. Elastic component; 13. Linear bearing. Detailed Implementation

[0031] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art. It should be noted that the description of these embodiments is for the purpose of aiding understanding the present invention, but does not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] In this document, the terms “upper,” “lower,” “left,” “right,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings when the ejector pin extends in the vertical direction and the tip of the ejector pin is located at the top. They are used only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0033] See Figures 1 to 10As shown, a die-pushing device for a die bonder includes a die-pushing pin assembly 100 and a base assembly 200. The die-pushing pin assembly 100 includes a die-pushing pin seat 1, a push rod 3, and a die 2. The die-pushing pin seat 1 has a hollow cavity, in which the push rod 3 can slide along its own axis. The lower part of the die 2 is detachably mounted on the upper part of the push rod 3. The upper part of the die-pushing pin seat 1 has a guide hole 104 through which the die 2 slides along its axis. The tip of the upper part of the die 2 can pass through the guide hole 104 to reach the top of the die-pushing pin seat 1 for pushing the die. An elastic element 11, which can be a spring, is provided between the die-pushing pin seat 1 and the push rod 3 to drive the push rod 3 to move downward. The elastic element 11 is sleeved on the push rod 3. The base assembly 200 includes a mounting base 5, a push block 10 that can move up and down in the mounting base 5, and a pushing mechanism for driving the push block 10 to reciprocate linearly in the up and down direction.

[0034] The aforementioned ejector seat 1 and mounting base 5 are detachably connected, and when the ejector seat 1 is fixedly connected to the mounting base 5, the lower part of the push rod 3 abuts against the push block 10. Thus, when the push block 10 is driven to move upward, the push rod 3 moves the ejector pin 2 upward; when the push block 10 moves downward, under the action of the elastic member 11, the push rod 3 moves the ejector pin 2 downward.

[0035] When it is necessary to replace ejector pin 2, ejector pin seat 1 is removed from mounting base 5, and the entire ejector pin assembly 100 can be detached from base assembly 200. Then, the replacement ejector pin assembly 100 is installed onto base assembly 200, thus enabling quick replacement of ejector pin 2. The position and accuracy of ejector pin 2 in ejector pin assembly 100 are pre-adjusted, so no significant adjustment time is required after replacement, saving adjustment time and ensuring that the production rhythm is not interrupted or disrupted, thereby contributing to the improvement of overall production efficiency.

[0036] As shown in the accompanying drawings, the upper part of the push block 10 is provided with a positioning groove 10a, and the lower part of the push rod 3 can be fitted into the positioning groove 10a. This allows the up-and-down movement of the push block 10 to be accurately transmitted to the push rod 3, so as to drive the push rod 3 to reciprocate synchronously in the up-and-down direction.

[0037] The pushing mechanism specifically includes a first cam 6 and a first motor 8 that drives the first cam 6 to rotate. The first cam 6 is located below the pushing block 10, and its outer peripheral surface abuts against the bottom of the pushing block 10. As the first cam 6 rotates, different positions on its outer peripheral surface contact the pushing block 10, causing the pushing block 10 to rise and fall in the vertical direction. In this embodiment, the first cam 6 is a first eccentric wheel, which rotates around a first rotation center line under the drive of the first motor 8. The first rotation center line is parallel to the axis of the first eccentric wheel and has a distance greater than 0. The first motor 8 has a first output shaft 81, which is directly connected to the first eccentric wheel or connected to the first eccentric wheel through a transmission assembly.

[0038] Here, the mounting base 5 has a mounting cavity, in which the first cam 6 and the push block 10 are both located. When the ejector seat 1 is connected to the mounting base 5, the lower part of the ejector seat 1 is at least partially inserted into the mounting cavity. Specifically, the lower part of the ejector seat 1 has a limiting platform 101 and a snap-fit ​​part 102 located below the limiting platform 101. When the ejector seat 1 is connected to the mounting base 5, the limiting platform 101 is supported on the mounting base 5, and the snap-fit ​​part 102 is inserted into the mounting cavity. A detachable connection structure is provided between the snap-fit ​​part 102 and / or the limiting platform 101 and the mounting base 5. In specific implementation, an alignment structure, such as the fit between a protrusion and a groove, is provided between the snap-fit ​​part 102 and / or the limiting platform 101 and the upper part of the mounting base 5. After alignment, it can be connected by fasteners such as bolts or other fasteners, making installation and disassembly very simple.

[0039] Referring to the accompanying drawings, the base assembly 200 also includes a base 4, and a mounting base 5 is vertically height-adjustable on the base 4. Thus, the base 4 can be directly and fixedly mounted on the die bonder's machine table. When the ejector pin assembly 100 is mounted on the base assembly 200, if the height of the ejector pin 2 deviates from the preset processing height, adjustment can be made by adjusting the height of the mounting base 5 on the base 4.

[0040] Specifically, an elastic component 12 is provided between the mounting base 5 and the base 4 to provide the elastic force required for the mounting base 5 to move upward relative to the base 4; the base 4 is also provided with an adjustment mechanism, which includes a second cam 7 and a second motor 9 that drives the second cam 7 to rotate, with the outer circumferential surface of the second cam 7 abutting downward against the mounting base 5. By applying downward force to the mounting base 5 through the adjustment mechanism, the amount of extension and retraction of the elastic component 12 is different, thereby allowing the mounting base 5 to be at different height positions on the base 4.

[0041] In this embodiment, the mounting base 5 includes a hollow cylindrical base body 51 and a fixing block 52 fixed to the bottom of the base body 51. An elastic component 12 is disposed below the fixing block 52 and between it and the base 4. The elastic component 12 is specifically a plurality of spaced springs. A second cam 7 is disposed in the base body 51, and a first cam 6 is also disposed in the base body 51.

[0042] Here, the second cam 7 is specifically a second eccentric wheel, which rotates around a second rotation center line under the drive of the second motor 9. This second rotation center line is parallel to the axis of the second eccentric wheel and has a gap greater than 0. The second motor 9 has a second output shaft 91, which is directly connected to the second eccentric wheel or connected to the second eccentric wheel through a transmission assembly. The mounting cavity of the base is also cylindrical, and a linear bearing 13 is installed inside. The linear bearing 13 is located between the base 4 and the mounting seat 5, making the vertical adjustment of the mounting seat 5 relative to the base 4 more precise.

[0043] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made based on the essence of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A die-pushing device for a die bonder, characterized in that, The jacking device includes: A ejector assembly includes an ejector seat, a push rod, and an ejector pin. The ejector seat has a hollow cavity, and the push rod is slidably inserted into the hollow cavity along its own axis. The lower part of the ejector pin is detachably mounted on the upper part of the push rod. The upper part of the ejector seat has a guide hole through which the ejector pin slides along its axis. An elastic element is provided between the ejector seat and the push rod to drive the push rod to move downward. The base assembly includes a mounting base, a push block movable up and down in the mounting base, and a push mechanism for driving the push block to reciprocate linearly in the up and down direction. The ejector pin seat is detachably connected to the mounting base, and when the ejector pin seat is fixedly connected to the mounting base, the lower part of the push rod abuts against the push block.

2. The die pushing device for the die bonder according to claim 1, characterized in that: The upper part of the push block is provided with an alignment groove, and the lower part of the push rod can be fitted into the alignment groove.

3. The die-pushing device for a die bonder according to claim 1, characterized in that: The pushing mechanism includes a first cam and a first motor that drives the first cam to rotate. The first cam is located below the pushing block, and the outer peripheral surface of the first cam abuts against the bottom of the pushing block.

4. The die pushing device for the die bonder according to claim 3, characterized in that: The first cam is a first eccentric wheel, and the first rotation center line of the first eccentric wheel has a distance greater than 0 from the axis of the first eccentric wheel.

5. The die pushing device for a die bonder according to claim 3, characterized in that: The mounting base has an inner cavity, and the first cam and the push block are both located in the inner cavity. When the ejector seat is connected to the mounting base, the lower part of the ejector seat is at least partially inserted into the inner cavity.

6. The die pushing device for a die bonder according to claim 5, characterized in that: The lower part of the ejector seat has a limiting platform and a snap-fit ​​part located below the limiting platform. When the ejector seat is connected to the mounting base, the limiting platform is supported on the mounting base, and the snap-fit ​​part is inserted into the mounting cavity. A detachable connection structure is provided between the snap-fit ​​part and / or the limiting platform and the mounting base.

7. The die pushing device for a die bonder according to claim 1, characterized in that: The base assembly also includes a base, and the mounting base is vertically height-adjustable on the base.

8. The die pushing device for a die bonder according to claim 7, characterized in that: An elastic component is provided between the mounting base and the base to provide the elastic force required for the mounting base to move upward relative to the base; the base is also provided with an adjustment mechanism, the adjustment mechanism including a second cam and a second motor that drives the second cam to rotate, the outer peripheral surface of the second cam abutting against the mounting base downward.

9. The die pushing device for a die bonder according to claim 8, characterized in that: The mounting base includes a hollow cylindrical base body and a fixing block fixed to the bottom of the base body. The elastic component is located below the fixing block and between it and the base. The second cam is located in the base body.

10. The die-pushing device for a die bonder according to claim 9, characterized in that: A linear bearing is provided between the base and the seat body; and / or, the second cam is a second eccentric wheel, and the second rotation center line of the second eccentric wheel has a distance greater than 0 from the axis of the second eccentric wheel.

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