Fine dispensing equipment for manufacturing IGBT (Insulated Gate Bipolar Translator)

Abstract

The invention relates to the technical field of glue dispensing equipment, in particular to fine glue dispensing equipment for IGBT manufacturing, which comprises a glue dispensing needle tube mechanism arranged at the discharge end of a glue dispensing valve, the glue dispensing needle tube mechanism comprises a needle tube body, a glue outlet of the needle tube body is in rolling connection with a ball, and a glue leakage prevention assembly is arranged in an inner cavity of the needle tube body. The glue anti-leakage assembly comprises an ejector rod which is vertically, elastically and slidably connected to an inner cavity of the needle tube body, and the arc end face of the ejector rod abuts against the peripheral wall of the ball. An inner cavity of the needle tube body is further provided with a secondary bubble treatment assembly, the secondary bubble treatment assembly comprises a pressing plate which synchronously and vertically slides with the ejector rod, a plurality of horn-shaped defoaming holes are formed in an inner cavity of the pressing plate at equal intervals, and spikes extending into the defoaming holes are fixedly installed on the peripheral wall of the ejector rod; the ball can be outwards abutted against the needle tube body through the movement of the ejector rod, so that the sealing effect between the needle tube body and the ball is improved, and excessive glue is prevented from leaking.

Description

Technical Field

[0001] The invention relates to the technical field of glue dispensing equipment, in particular to a refined glue dispensing equipment made for IGBT. Background Art

[0002] IGBT is a composite fully controlled voltage-driven power semiconductor device with high input impedance and low conduction voltage drop. In the semiconductor device packaging process, the soldering machine is used to paste the chip, specifically: using a dispensing needle to apply solder paste on the frame pad, and then paste the chip; the inside of the dispensing needle is hollow, forming a circulation channel for the solder paste, and the dispensing needle is a single-hole dispensing needle.

[0003] In the prior art, there is a utility model patent with a publication (announcement) number of CN216025916U and a name of semiconductor solder wafer dispensing needle, which includes a needle tube body with a hollow interior, the needle tube body having a glue outlet and a glue inlet relatively arranged, and a freely rotatable ball is provided at the glue outlet of the needle tube body; the utility model dispensing needle is provided with a freely rotatable ball at the glue outlet, and the free rolling of the ball is used to realize glue discharge, so that during the dispensing process, the rolling of the ball can disperse the pressure on the one hand, buffer the impact force of the contact substrate and the frame base, and avoid the occurrence of crushing and indentation phenomena; on the other hand, the rolling of the ball can form uniform and smooth glue dots, so that the glue dots are uniform in size and are not prone to wire drawing and tail swinging phenomena.

[0004] The device of the patent can solve the problem that the existing metal dispensing needles are prone to causing damage and indentation to the surfaces of substrates, frame bases, etc., and solve the problem that the glue dots are easily uneven in size and the tail is easily drawn in the existing dispensing operation; however, the device of the patent still has the following technical defects during use: (1) Due to the long-term friction between the ball and the needle body, the gap between the ball and the needle body will become larger, which is easy to cause the leakage of excess glue at the outlet of the needle body, making it inconvenient for the staff to accurately use the glue; (2) Although the device of the patent may have been defoamed during the preparation or storage of the glue, bubbles may still be introduced again during the process of the glue entering the needle body; for example, the flow and transportation process of the glue may cause the generation of bubbles, or air may be mixed into the glue during the process of transferring the glue from the storage container to the needle body. Secondary defoaming treatment can further reduce the bubble content in the glue and improve the accuracy and consistency of dispensing. However, the device of the patent does not have a secondary defoaming treatment mechanism, which is easy to affect the subsequent dispensing quality of the device. Summary of the invention

[0005] The purpose of the present invention is to provide a refined glue dispensing device for IGBT production.

[0006] The technical problems solved by the present invention are: (1) the existing equipment has the problem of glue leakage at the discharge port of the needle tube body after long-term use; (2) the existing equipment is inconvenient to perform secondary treatment on the bubbles in the glue.

[0007] The present invention can be implemented through the following technical scheme: a refined dispensing device made for IGBT, comprising a dispensing needle tube mechanism arranged at the dispensing end of the dispensing valve, the dispensing needle tube mechanism comprising a needle tube body, a ball rollingly connected to the dispensing port of the needle tube body, and dispensing glue by rotating the ball, the ball can increase the fluidity and stability of the glue, so that the dispensing of glue is stable, not easy to swing tail and draw, and the size of the glue dots is uniform; when dispensing glue, the part of the ball extending out of the dispensing port contacts the dispensing operation surface, and the end face does not contact the dispensing operation surface; the inner cavity of the needle tube body is provided with a glue leakage prevention component, and the glue leakage prevention component comprises a push rod vertically elastically slidably connected to the inner cavity of the needle tube body, and the arc end face of the push rod abuts against the outer peripheral wall of the ball; The inner cavity of the needle tube body is also provided with a bubble secondary processing component, which includes a pressure plate that slides vertically synchronously with the push rod. The inner cavity of the pressure plate is equidistantly provided with a plurality of trumpet-shaped debubbling holes. The outer peripheral wall of the push rod is fixedly equipped with spikes that extend into each debubbling hole. The pressure plate, push rod and other components in the needle tube body will not stick to the glue.

[0008] A further technical improvement of the present invention is that the discharge end of the dispensing valve is connected to the needle tube body through a connecting assembly, the connecting assembly includes a fixed sleeve fixedly connected to the discharge end of the dispensing valve, the fixed sleeve includes a threaded sleeve fixed to its bottom end, and the glue inlet of the needle tube body is fixedly connected to a connecting sleeve threadedly connected to the threaded sleeve.

[0009] A further technical improvement of the present invention is that: a circular closed groove is provided in the inner cavity of the fixed sleeve, a support spring is fixedly installed on the inner top wall of the circular closed groove, the inner cavity of the circular closed groove is vertically slidably connected with a sliding plate fixed to the support spring, the sliding plate is fixed to the pressure plate, the pressure plate is driven by the dispensing valve to slide vertically, and the push rod is driven to move synchronously by the pressure plate.

[0010] A further technical improvement of the present invention is that at least two sliding blocks fixed to the pressure plate are symmetrically fixed on the inner circumferential wall of the sliding plate, a sliding groove for the sliding blocks to slide is opened in the inner cavity of the fixed sleeve, and an arc-shaped closing plate vertically slidably connected to the inner wall of the circular closed groove is fixed on the sliding plate. The arc-shaped closing plate is arranged to facilitate closing the sliding groove, thereby preventing glue from entering the inner cavity of the fixed sleeve through the sliding groove.

[0011] A further technical improvement of the present invention is that two moving blocks are symmetrically fixedly installed on one side of the arc-shaped closing plate, and the inner cavity of the fixed sleeve is provided with a moving groove for the moving block to slide vertically. The coordinated arrangement of the moving block and the moving groove facilitates the improvement of the stability of the arc-shaped closing plate during vertical sliding.

[0012] A further technical improvement of the present invention is that an auxiliary sliding part cooperating with the sliding of the push rod is provided at the middle end of the inner cavity of the connecting sleeve and the needle tube body, and the auxiliary sliding part includes a sliding frame vertically slidably connected to the middle end of the inner cavity of the connecting sleeve or the needle tube body, and a fixed rod group fixed to the push rod is fixedly installed on the inner circumferential wall of the sliding frame. The auxiliary sliding part is provided to facilitate improving the stability of the push rod during vertical sliding, and effectively avoid its position displacement during vertical sliding.

[0013] A further technical improvement of the present invention is that the bottom end fixed sleeve of the outer peripheral wall of the connecting sleeve is provided with an abutment plate that matches the threaded sleeve, and the diameter specification of the abutment plate is greater than or equal to the diameter specification of the threaded sleeve, thereby facilitating better adaptation to the threaded sleeve and facilitating the staff to install the needle tube body.

[0014] A further technical improvement of the present invention is that the threaded sleeve and the abutment plate are sealed by a sealing member, the sealing member includes a rotating seat symmetrically rotatably connected to both sides of the threaded sleeve, the rotating seat is rotatably connected to a rotating plate on a side away from the threaded sleeve, a sealing block is fixedly installed on one side of the rotating plate, and a sealing groove matching the sealing block is provided on one side of the abutment plate. The setting of the sealing member facilitates the stability of the needle tube body during installation and prevents the needle tube body from rotating due to external factors, thereby facilitating the improvement of the overall sealing of the equipment, reducing the possibility of glue leakage, and making it easier for staff to use.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention enables the needle tube body to well receive the glue output by the dispensing valve by threading the connecting sleeve and the threaded sleeve, and then drives the dispensing valve to make the glue pass through the area jointly composed of the connecting sleeve and the threaded sleeve in turn and then enter the needle tube body, and the dispensing valve drives the pressure plate to apply force toward the ball direction, and the support spring is stretched when the pressure plate is driven by the dispensing valve, and the elastic force of the support spring causes the pressure plate to slide vertically, and after the pressure plate slides to a certain distance, it pushes the annular pressure frame to move synchronously, and the annular pressure frame is fixedly connected to the push rod, and the push rod slides vertically synchronously, and the movement of the push rod can make the ball abut against the needle tube body outward, thereby improving the sealing effect between the needle tube body and the ball, preventing excess glue from leaking out, and facilitating the subsequent dispensing work of the equipment and the use of the staff.

[0016] 2. In the present invention, when the glue passes through the area formed by the connecting sleeve and the threaded sleeve, the glue will pass through the multiple defoaming holes opened in the pressure plate. The setting of the trumpet-shaped defoaming holes facilitates the glue to enter the defoaming holes opened in the pressure plate. The sharp thorns fixed on the connecting rod group fixed to the circular pressure frame facilitate the bursting of bubbles in the glue. The bubble content in the glue can be further reduced by performing secondary defoaming treatment on the bubbles in the glue, thereby facilitating improving the accuracy and consistency of the equipment's dispensing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the present invention; Figure 2 A three-dimensional diagram of the needle tube body and the connecting sleeve of the present invention; Figure 3 A three-dimensional diagram of the threaded sleeve of the present invention when it is inverted; Figure 4 It is a schematic diagram of the internal structure connection of the fixed sleeve of the present invention; Figure 5 For the present invention Figure 4 A partial enlarged view of the middle A; Figure 6 For the present invention Figure 4 Schematic diagram of top view structural connection in ; Figure 7 For the present invention Figure 6 A partial enlarged view of point B in the middle; Figure 8 It is a schematic diagram of the structural connection of the auxiliary sliding member of the present invention; Fig. 9 It is a schematic diagram of the structural connection of the pressure-bearing member of the present invention; Fig.10 is a schematic diagram of the overall structure of the second embodiment of the present invention; Fig.11 For the present invention Fig.10 A partial enlarged view of point C in the middle.

[0019] In the figure: 1. Connecting sleeve; 11. Fixed sleeve; 12. Threaded sleeve; 13. Needle tube body; 14. Abutment plate; 141. Rotating seat; 142. Rotating plate; 143. Sealing block; 144. Sealing groove; 15. Ball bearing; 16. Push rod; 17. Sliding frame; 171. Fixed rod group; 18. Circular pressure frame; 181. Connecting rod group; 182. Spike; 2. Pressure plate; 21. Defoaming hole; 22. Circular closed groove; 23. Support spring; 24. Sliding plate; 25. Sliding block; 26. Sliding groove; 27. Circular arc closed plate; 28. Moving block; 29. ​​Moving groove; 3. Screw groove; 4. External thread. DETAILED DESCRIPTION

[0020] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0021] Example 1 See also Figure 1-9 As shown, a refined dispensing device made for IGBT includes a dispensing needle tube mechanism arranged at the dispensing valve discharge end, the dispensing needle tube mechanism includes a needle tube body 13, the dispensing valve discharge end and the needle tube body 13 are connected by a connecting assembly, one end of the needle tube body 13 is provided with a glue inlet, the glue inlet of the needle tube body 13 corresponds to the dispensing valve discharge end one by one, the other end of the needle tube body 13 is provided with a glue outlet, the interior of the needle tube body 13 is hollow, thereby forming a connecting channel, the connecting channel connects the glue inlet and the glue outlet, wherein the diameter of the glue inlet The specification is larger than the diameter specification of the glue outlet; the glue outlet of the needle tube body 13 is connected with a ball 15 in a rolling manner. Since the ball 15 is freely rolled at the glue outlet of the needle tube body 13, the glue can be squeezed out through the gap between the ball 15 and the glue outlet through the rolling of the ball 15, thereby realizing glue dispensing; the inner wall surface of the needle tube body 13 near the glue outlet forms a rolling groove for the ball 15 to roll, and the setting of the rolling groove facilitates the relative position limitation of the ball 15, so that the ball 15 cannot move in the inner cavity of the needle tube body 13 but can only roll freely; The connecting component includes a fixed sleeve 11 fixedly connected to the discharging end of the dispensing valve, a threaded sleeve 12 is fixedly installed on the side of the fixed sleeve 11 away from the discharging end of the dispensing valve, a connecting sleeve 1 is fixedly connected to the glue inlet of the needle tube body 13, the outer peripheral wall of the connecting sleeve 1 is provided with an external thread 4, the inner cavity of the threaded sleeve 12 is provided with a screw groove 3 matching the external thread 4, the bottom end of the outer peripheral wall of the connecting sleeve 1 is fixedly provided with an abutment plate 14 matching the threaded sleeve 12, and the needle tube body 13 can well receive the glue output by the dispensing valve through the threaded connection between the connecting sleeve 1 and the threaded sleeve 12.

[0022] The inner cavity of the needle tube body 13 is provided with a glue anti-leakage component, which includes a push rod 16 vertically elastically slidably connected to the inner cavity of the needle tube body 13, and the arc end surface of the push rod 16 abuts against the outer peripheral wall of the ball 15. The middle ends of the inner cavities of the needle tube body 13 and the connecting sleeve 1 are provided with auxiliary sliding members connected to the push rod 16. The auxiliary sliding members include a sliding frame 17 vertically slidably connected to the inner cavity of the needle tube body 13 or the connecting sleeve 1, and the inner peripheral wall of the sliding frame 17 is fixedly installed with a fixed rod group 171 fixed to the push rod 16; The inner cavity of the fixed sleeve 11 is provided with an annular closed groove 22, and a support spring 23 is fixedly installed on the inner top wall of the annular closed groove 22. The inner cavity of the annular closed groove 22 is vertically slidably connected with a sliding plate 24 fixed with the support spring 23. Two sliding blocks 25 are symmetrically fixedly installed on the inner peripheral wall of the sliding plate 24. A pressure plate 2 fixed with the two sliding blocks 25 is vertically slidably connected between the two inner side walls of the fixed sleeve 11. The inner cavity of the pressure plate 2 is equidistantly provided with a plurality of defoaming holes 21, and the defoaming holes 25 are symmetrically connected to the inner cavity of the fixed sleeve 11. 1 is in the shape of a trumpet, a pressure-bearing member corresponding to the pressure plate 2 is fixedly mounted on the top rod 16, and the pressure-bearing member includes a connecting rod group 181 fixed on the top rod 16, and spikes 182 corresponding to the defoaming holes 21 are fixedly mounted on the connecting rod group 181, and the spikes 182 are used to puncture bubbles in the glue, and a circular pressure frame 18 vertically slidably connected to the inner cavity of the fixed sleeve 11 is fixedly mounted on the outer side of the connecting rod group 181, and the diameter of the circular pressure frame 18 is equal to the diameter of the pressure plate 2; The inner wall of the fixed sleeve 11 is provided with a sliding groove 26 for the sliding block 25 to slide, and two arc-shaped closing plates 27 for closing the sliding groove 26 are symmetrically fixedly connected to the sliding plate 24. Two moving blocks 28 are symmetrically fixedly installed on one side of the arc-shaped closing plate 27 close to the sliding groove 26, and the inner cavity of the fixed sleeve 11 is provided with a moving groove 29 for the moving block 28 to slide vertically.

[0023] When the present invention is in use, the connecting sleeve 1 and the threaded sleeve 12 are first threadedly connected so that the needle tube body 13 can well receive the glue output by the dispensing valve, and then the glue is driven by the dispensing valve to make the glue pass through the area formed by the connecting sleeve 1 and the threaded sleeve 12 in sequence and then enter the needle tube body 13, and the pressure plate 2 is given a force toward the ball 15 by the drive of the dispensing valve. When the pressure plate 2 is driven by the dispensing valve, the supporting spring 23 will be stretched, and the pressure plate 2 will slide vertically by the elastic force of the supporting spring 23. After the pressure plate 2 slides to a certain distance, it will push the annular pressure frame 18 to move synchronously. Since the annular pressure frame 18 is fixedly connected to the push rod 16, the push rod 16 can slide vertically synchronously. The movement of the push rod 16 can make the ball 15 outwardly abut against the needle tube body 13, thereby improving the sealing effect between the needle tube body 13 and the ball 15, preventing excess glue from leaking out, and thus facilitating the subsequent dispensing work of the equipment and facilitating the use of the staff; When the glue passes through the area formed by the connecting sleeve 1 and the threaded sleeve 12, the glue will pass through the multiple defoaming holes 21 opened in the pressure plate 2. The setting of the trumpet-shaped defoaming holes 21 facilitates the glue to enter the defoaming holes 21 opened in the pressure plate 2. The spikes 182 fixed on the connecting rod group 181 fixed to the circular pressure frame 18 facilitate puncturing the bubbles in the glue. The secondary defoaming treatment of the bubbles in the glue can further reduce the bubble content in the glue, thereby facilitating improving the accuracy and consistency of the equipment's dispensing. Example

[0025] See also Figure 10-11 As shown, the threaded sleeve 12 and the abutment plate 14 are sealed by a seal, and the seal includes a rotating seat 141 symmetrically rotatably connected to both sides of the threaded sleeve 12, a rotating plate 142 is rotatably connected to the side of the rotating seat 141 away from the threaded sleeve 12, a sealing block 143 is fixedly installed on one side of the rotating plate 142, and a sealing groove 144 matching the sealing block 143 is opened on one side of the abutment plate 14.

[0026] When the present invention is in use, after the needle tube body 13 and the threaded sleeve 12 are installed, the rotating plates 142 on both sides of the threaded sleeve 12 are rotated respectively so that the sealing block 143 on one side of the rotating plate 142 can enter the sealing groove 144 in the threaded sleeve 12. By arranging a sealing member between the threaded sleeve 12 and the abutment plate 14, it is convenient to ensure the stability of the needle tube body 13 during installation, and prevent the needle tube body 13 from rotating due to external factors, thereby facilitating the improvement of the overall sealing of the equipment, reducing the possibility of glue leakage, and making it easier for staff to use.

[0027] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A fine glue dispensing device for IGBT, comprising a glue dispensing needle tube mechanism arranged at the discharge end of a glue dispensing valve, the glue dispensing needle tube mechanism comprising a needle tube body (13), a ball (15) being rollingly connected at the glue outlet of the needle tube body (13), characterized in that: The inner cavity of the needle tube body (13) is provided with a glue anti-leakage component, and the glue anti-leakage component comprises a push rod (16) vertically elastically slidably connected to the inner cavity of the needle tube body (13), and the arc end surface of the push rod (16) abuts against the outer peripheral wall of the ball (15); The inner cavity of the needle tube body (13) is also provided with a bubble secondary processing component, which includes a pressure plate (2) that vertically slides synchronously with the push rod (16), and the inner cavity of the pressure plate (2) is provided with a plurality of trumpet-shaped defoaming holes (21) at equal intervals, and the outer peripheral wall of the push rod (16) is fixedly provided with a spike (182) that extends into each defoaming hole (21).

2. The refined dispensing equipment for IGBT production according to claim 1 is characterized in that: The dispensing valve's discharge end is connected to the needle body (13) via a connecting assembly, wherein the connecting assembly comprises a fixed sleeve (11) fixedly connected to the dispensing valve's discharge end, the fixed sleeve (11) comprising a threaded sleeve (12) fixed to its bottom end, and a connecting sleeve (1) threadedly connected to the threaded sleeve (12) is fixedly connected to the glue inlet of the needle body (13).

3. The refined dispensing equipment for IGBT production according to claim 2 is characterized in that: The inner cavity of the fixed sleeve (11) is provided with a circular closed groove (22), a support spring (23) is fixedly mounted on the inner top wall of the circular closed groove (22), and a sliding plate (24) fixed to the support spring (23) is vertically slidably connected to the inner cavity of the circular closed groove (22), and the sliding plate (24) is fixed to the pressure plate (2).

4. The refined dispensing equipment for IGBT production according to claim 3 is characterized in that: The inner wall of the sliding plate (24) is symmetrically fixed with at least two sliding blocks (25) fixed to the pressure plate (2); the inner cavity of the fixed sleeve (11) is provided with a sliding groove (26) for the sliding block (25) to slide; and an arc-shaped closing plate (27) is fixedly installed on the sliding plate (24) and is vertically slidably connected to the inner wall of the annular closing groove (22). The arc-shaped closing plate (27) is provided to facilitate closing the sliding groove (26), thereby preventing glue from entering the inner cavity of the fixed sleeve (11) through the sliding groove (26).

5. The refined dispensing equipment for IGBT production according to claim 4 is characterized in that: Two moving blocks (28) are symmetrically fixedly mounted on one side of the arc-shaped closing plate (27), and the inner cavity of the fixed sleeve (11) is provided with a moving groove (29) for the moving blocks (28) to slide vertically.

6. The refined dispensing equipment for IGBT production according to claim 2 is characterized in that: The middle ends of the inner cavities of the connecting sleeve (1) and the needle tube body (13) are both provided with auxiliary sliding members that cooperate with the push rod (16) for sliding. The auxiliary sliding member comprises a sliding frame (17) vertically slidably connected to the middle end of the inner cavity of the connecting sleeve (1) or the needle tube body (13). The inner peripheral wall of the sliding frame (17) is fixedly mounted with a fixed rod group (171) that is fixed to the push rod (16).

7. The refined dispensing equipment for IGBT production according to claim 2 is characterized in that: The bottom end of the outer peripheral wall of the connecting sleeve (1) is fixedly sleeved with an abutment plate (14) that matches the threaded sleeve (12).

8. The refined dispensing equipment for IGBT production according to claim 7 is characterized in that: The threaded sleeve (12) and the abutment plate (14) are sealed by a sealing member, the sealing member comprising a rotating seat (141) symmetrically rotatably connected to two sides of the threaded sleeve (12), a side of the rotating seat (141) away from the threaded sleeve (12) being rotatably connected to a rotating plate (142), a sealing block (143) being fixedly mounted on one side of the rotating plate (142), and a sealing groove (144) matching with the sealing block (143) being provided on one side of the abutment plate (14).

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