High-precision internal centrifugal glue-spinning device

Abstract

This invention provides a high-precision centrifugal glue-spinning device for inner holes, comprising a support assembly, a servo linear module vertically mounted on the support assembly, a servo motor driven and connected to the top of the servo linear module, and a high-speed spindle motor and a dispensing pressure tank arranged in parallel on the front side of the module connecting plate. The high-speed spindle motor and the dispensing pressure tank are connected to the servo linear module through the module connecting plate. The servo motor drives the servo linear module to synchronously move the high-speed spindle motor and the dispensing pressure tank up and down. An inverted conical glue-spinning disc is provided at the lower end of the high-speed spindle motor's shaft, and a shaped glue needle is connected to the lower end of the dispensing pressure tank. The glue outlet of the shaped glue needle extends to the upper surface of the inverted conical glue-spinning disc. During glue application, the inverted conical glue-spinning disc and the shaped glue needle are inserted into the inner hole of the product to be glued and can move axially along the inner hole. By combining the high-speed spindle motor and the inverted conical glue-spinning disc, the bottleneck of high-precision glue application technology for small-diameter inner walls is overcome, providing an efficient solution for micro-device manufacturing.

Description

Technical Field

[0001] This utility model relates to the field of precision adhesive coating equipment technology, and in particular to a high-precision internal hole centrifugal adhesive spinning device, which can be used for uniform adhesive coating in fields such as semiconductor packaging and micro-sensor manufacturing. Background Technology

[0002] In the mechanical field, adhesives are often used as a medium for bonding and securing components. For example... Figure 8 As shown, some products require adhesive to be applied inside their inner holes, which have relatively small diameters (≤10mm). Existing adhesive applicators mostly use high-pressure atomizing nozzles, which are ill-suited for the uniform coating required on the inner walls of these small holes. Traditional glue needles have significant glue dispensing errors (typically ≥5μl), and the high-pressure nozzle structure easily leads to glue splashing, affecting coating accuracy and process stability. Therefore, it is necessary to improve existing adhesive applicators to address these problems. Utility Model Content

[0003] The technical problem to be solved by this utility model is: in order to overcome the shortcomings of the prior art, this utility model provides a high-precision internal hole centrifugal glue-spinning device.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a high-precision internal centrifugal glue-spinning device, including a support assembly, a servo motor, a high-speed spindle motor, a glue-dispensing pressure tank, a module connecting plate, and an inverted conical glue-spinning disc. A servo linear module is vertically mounted on the support assembly. The servo motor is driven and connected to the top of the servo linear module. The high-speed spindle motor and the glue-dispensing pressure tank are arranged in parallel on the front side of the module connecting plate. The high-speed spindle motor is directly fixed to the module connecting plate. The glue-dispensing pressure tank is connected via a glue tank connecting plate. On the module connection plate, the high-speed spindle motor and the dispensing pressure tank are connected to the servo linear module through the module connection plate; the servo motor drives the servo linear module to drive the high-speed spindle motor and the dispensing pressure tank to move up and down synchronously; the lower end of the shaft of the high-speed spindle motor is provided with an inverted conical glue-spinning disc, and the lower end of the dispensing pressure tank is connected with a special-shaped glue needle. The glue outlet end of the special-shaped glue needle extends to the upper surface of the inverted conical glue-spinning disc. When applying glue, the inverted conical glue-spinning disc and the special-shaped glue needle are inserted into the inner hole of the product to be glued and can move along the axial direction of the inner hole.

[0005] Furthermore, the irregularly shaped glue needle is generally a side-mounted "Z" shape, including a first connecting segment, a second connecting segment, and a third connecting segment connected in sequence. The first connecting segment is vertically arranged and has a conical glue bucket connecting part at the upper end. The lower end of the first connecting segment is connected to the right end of the second connecting segment, and the connection adopts an arc transition. The left end of the second connecting segment extends to the lower left, so that the second connecting segment forms an angle α with the horizontal direction. The left end of the second connecting segment is connected to the upper end of the third connecting segment, and the connection adopts an arc transition. The lower end of the third connecting segment extends downward to the inverted conical glue-spinning disc, and the glue outlet of the third connecting segment is close to the upper surface of the inverted conical glue-spinning disc.

[0006] Adhesive is applied to the upper surface of an inverted conical glue-spinning disc using a special-shaped glue needle. A high-speed spindle motor drives the inverted conical glue-spinning disc to rotate, and under the action of centrifugal force, the adhesive on the upper surface of the inverted conical glue-spinning disc is thrown outward, thereby uniformly coating the inner hole of the product to be glued.

[0007] Preferably, the included angle α is in the range of 5°-10°.

[0008] Furthermore, it also includes a glue needle limiting plate, which is connected below the glue bucket connecting plate. The bottom front side of the glue needle limiting plate has a limiting boss, and the front surface of the limiting boss has a limiting groove. The limiting groove is inclined, with the inclination angle being the same as the angle α formed between the second connecting section of the irregular-shaped glue needle and the horizontal direction. In use, the second connecting section is embedded in the limiting groove. The limiting groove limits and guides the irregular-shaped glue needle, ensuring smooth glue flow and avoiding blockages or unstable glue dispensing due to excessive flow rate.

[0009] Preferably, the cone angle β of the inverted conical spinning disc is 15°-30°.

[0010] Furthermore, to ensure stable and accurate glue dispensing, an air supply valve for the glue tank is included. This air supply valve is mounted on the support plate of the bracket assembly and connects the dispensing pressure tank to the air source via an air pipe. By connecting the dispensing pressure tank to the air source through the air supply valve, a certain pressure is applied to the dispensing pressure tank to ensure the accuracy of glue dispensing.

[0011] Furthermore, when the adhesive needs to be replaced, or after the adhesive has been left unused for a certain period of time, the adhesive inside the shaped glue needle tends to become viscous and no longer meets the requirements. Therefore, when dispensing adhesive again, this waste adhesive needs to be removed first. Thus, a waste adhesive collection mechanism is also included. This mechanism comprises a waste adhesive cup, a cup cylinder, and a cup holder. The cup cylinder is horizontally fixed to the support assembly, and the cup holder is connected to the push rod at the left end of the cup cylinder. The waste adhesive cup is placed on the cup holder, and the cup cylinder moves the waste adhesive cup horizontally, allowing it to move below the dispensing port of the shaped glue needle. This is used to collect the waste adhesive discharged from the dispensing pressure tank, preventing adhesive from dripping onto other components and causing problems.

[0012] Furthermore, the bracket assembly includes a base, a support frame, and a support plate. The support frame includes multiple profiles arranged horizontally and vertically. The bottom of the support frame is fixedly connected to the base. The support plate is fixedly connected to the front side of the support frame and is used to install the servo linear module and the glue tank air supply valve.

[0013] The key technical points of this utility model are as follows:

[0014] I. Microporous glue needle precision glue control technology

[0015] Irregularly shaped glue needle structure: It adopts a stainless steel glue needle with an inner diameter of 0.21mm, combined with a glue dispensing pressure tank (1-3bar) closed-loop control to achieve glue dispensing accuracy of ±1μl and glue layer thickness error ≤±5%.

[0016] Viscosity adaptive adjustment: The high-speed spindle motor speed (0-18000rpm) is dynamically adjusted by the frequency converter to adapt to adhesives with a viscosity of 100-1000cps, avoiding stringing or insufficient adhesive application.

[0017] II. High-speed centrifugal spinning structure design

[0018] Inverted conical glue-spraying disc: Cone angle 15°-30°, made of stainless steel, which allows the glue to spread evenly along the inner wall of the hole under the action of centrifugal force, avoiding downward splashing and contamination, and the glue layer coverage uniformity ≥95%.

[0019] Dynamic centrifugal force matching: Automatically calculates the optimal speed based on the inner diameter (10-50mm) (e.g., 18000rpm for a 10mm inner diameter).

[0020] III. Multi-axis Cooperative Motion Control

[0021] Servo motor high-precision positioning: axial movement speed adjustable from 0.1-5mm / s, repeatability ±0.005mm, ensuring that the adhesive application stroke matches the inner hole depth.

[0022] Synchronous linkage control: The spindle speed, glue supply pressure, and motor displacement parameters are coordinated in real time to achieve a dynamic balance between the glue diffusion rate and the axial coating speed.

[0023] IV. Modular Maintenance and Rapid Adaptation

[0024] Quick-change glue needle: The glue needle and pressure tank are connected by a snap-fit, which supports disassembly and calibration within 30 seconds and can be adapted to different hole diameter requirements.

[0025] Standardized interface for the rubber slinger: The inverted conical rubber slinger is positioned with the spindle using a clip, eliminating the need to recalibrate the dynamic balance after replacement, thus improving maintenance efficiency by 70%.

[0026] The beneficial effects of this utility model are: the high-precision internal hole centrifugal glue-spinning device provided by this utility model, through the combination of a high-speed spindle motor and an inverted conical glue-spinning disc, breaks through the technical bottleneck of high-precision glue coating on the inner wall of small-diameter holes, and provides an efficient solution for the manufacturing of micro-devices. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0028] Figure 1 This is a three-dimensional structural diagram of the high-precision internal centrifugal glue-spinning device of this utility model.

[0029] Figure 2 This is a structural diagram showing the positions of the high-speed spindle motor and the dispensing pressure tank.

[0030] Figure 3 This is a partially enlarged schematic diagram of the lower part of the high-speed spindle motor.

[0031] Figure 4 yes Figure 3 A magnified structural diagram of point A in the middle.

[0032] Figure 5 This is a schematic diagram of the structure of the glue needle limiting plate.

[0033] Figure 6 This is a schematic diagram of the structure of the glue needle limiting plate.

[0034] Figure 7 This is a schematic diagram of the structure of an irregularly shaped glue needle.

[0035] Figure 8 This is a structural diagram of the product to be coated with adhesive.

[0036] In the diagram: 1. Servo motor, 2. High-speed spindle motor, 3. Dispensing pressure tank, 4. Dispensing needle limiting plate, 41. Limiting boss, 42. Limiting groove, 5. Irregularly shaped dispensing needle, 51. First connecting section, 52. Second connecting section, 53. Third connecting section, 54. Dispensing port, 6. Waste glue cup, 7. Glue cup cylinder, 8. Glue tank air supply valve, 9. Servo linear module, 10. Module connecting plate, 11. Inverted conical glue-spinning disc, 12. Glue cup holder, 13. Base, 14. Support frame, 15. Support plate, 16. Glue tank connecting plate, 17. Product to be glued, 171. Inner hole. Detailed Implementation

[0037] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0038] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0040] like Figures 1-4As shown, this utility model discloses a high-precision internal centrifugal glue-spinning device, which includes a support assembly, a servo motor 1, a high-speed spindle motor 2, a glue-dispensing pressure tank 3, a module connecting plate 10, and an inverted conical glue-spinning disc 11. The support assembly includes a base 13, a support frame 14, and a support plate 15. The support frame 14 includes multiple profiles arranged horizontally and vertically. The bottom of the support frame 14 is fixedly connected to the base 13. The support plate 15 is fixedly connected to the front side of the support frame 14 and is used to install a servo linear module 9 and a glue tank air supply valve 8. The servo linear module 9 is vertically mounted on the support plate 15 of the bracket assembly. The servo motor 1 is driven and connected to the top of the servo linear module 9. The high-speed spindle motor 2 and the dispensing pressure tank 3 are arranged in parallel on the front side of the module connecting plate 10. The high-speed spindle motor 2 is directly fixed to the module connecting plate 10. The dispensing pressure tank 3 is connected to the module connecting plate 10 through the glue tank connecting plate 16. The high-speed spindle motor 2 and the dispensing pressure tank 3 are connected to the servo linear module 9 through the module connecting plate 10. The servo motor 1 drives the servo linear module 9 to drive the high-speed spindle motor 2 and the dispensing pressure tank 3 to move up and down synchronously. The lower end of the shaft of the high-speed spindle motor 2 is provided with The system includes an inverted conical glue-spinning disc 11. Preferably, the inverted conical glue-spinning disc 11 and the shaft of the high-speed spindle motor 2 are positioned by a clamp, eliminating the need for dynamic balancing recalibration after replacement and improving maintenance efficiency by 70%. The lower end of the dispensing pressure tank 3 is connected to a shaped glue needle 5. Preferably, the shaped glue needle 5 and the dispensing pressure tank 3 are connected by a snap-fit ​​mechanism, allowing for disassembly and calibration within 30 seconds, adapting to different aperture requirements, and facilitating the replacement of the shaped glue needle 5. The glue outlet of the shaped glue needle 5 extends to the upper surface of the inverted conical glue-spinning disc 11. During glue application, the inverted conical glue-spinning disc 11 and the shaped glue needle 5 are inserted into the inner hole 171 of the product 17 to be glued and can move axially along the inner hole 171. To ensure stable and accurate glue dispensing, a glue tank air supply valve 8 is also included. The glue tank air supply valve 8 is mounted on the support plate 15 of the bracket assembly and connects the dispensing pressure tank 3 to an air source via an air pipe. The dispensing pressure tank 3 is connected to the air source via the glue tank air supply valve 8, applying a certain pressure to the dispensing pressure tank 3 to ensure the accuracy of glue dispensing. Preferably, the servo motor 1 controls the axial displacement of the high-speed spindle motor 2, with a motion accuracy of ±0.01mm and a speed range of 0.1-5mm / s. The high-speed spindle motor 2 is equipped with a frequency converter to achieve stepless speed adjustment from 0-18000rpm, adapting to different glue viscosities. An integrated pressure reducing valve and air supply valve provide a pressure adjustment range of 1-3bar, ensuring stable glue output. The inverted conical glue-spinning disc 11 has a cone angle β of 15°-30°, is made of stainless steel, and under centrifugal force, the glue spreads evenly along the horizontal plane, suppressing downward splashing.

[0041] like Figure 7As shown, the irregularly shaped glue needle 5 is generally a side-mounted "Z" shape, including a first connecting segment 51, a second connecting segment 52, and a third connecting segment 53 connected in sequence. The first connecting segment 51 is vertically arranged and has a conical glue bucket connecting part at the upper end. The lower end of the first connecting segment 51 is connected to the right end of the second connecting segment 52, and the connection is made with an arc transition. The left end of the second connecting segment 52 extends to the lower left, so that the second connecting segment 52 forms an angle α with the horizontal direction. Preferably, the angle α is in the range of 5°-10°. The left end of the second connecting segment 52 is connected to the upper end of the third connecting segment 53, and the connection is made with an arc transition. The lower end of the third connecting segment 53 extends downward to the inverted conical glue-spinning disc 11, and the glue outlet 54 of the third connecting segment 53 is close to the upper surface of the inverted conical glue-spinning disc 11. As a preferred option, the inner diameter of the irregularly shaped glue needle 5 is 0.21mm, which is suitable for glue with a viscosity of 100-1000cps. It is made of stainless steel and the glue dispensing accuracy reaches 1.0μl.

[0042] like Figure 5 and Figure 6 As shown, it also includes a glue needle limiting plate 4, which is connected below the glue bucket connecting plate 16. The front side of the bottom of the glue needle limiting plate 4 has a limiting boss 41, and the front surface of the limiting boss 41 has a limiting groove 42. The limiting groove 42 is inclined, with the inclination angle being the same as the angle α formed between the second connecting section 52 of the irregular glue needle 5 and the horizontal direction. In use, the second connecting section 52 is embedded in the limiting groove 42. The limiting groove 42 limits and guides the irregular glue needle 5, ensuring smooth glue flow and avoiding blockage or unstable glue dispensing due to excessive flow rate.

[0043] like Figure 1 As shown, it also includes a waste glue collection mechanism, which comprises a waste glue cup 6, a glue cup cylinder 7, and a glue cup holder 12. The glue cup cylinder 7 is horizontally fixed on the support assembly, and the glue cup holder 12 is connected to a push rod at the left end of the glue cup cylinder 7. The waste glue cup 6 is disposed on the glue cup holder 12, and the glue cup cylinder 7 drives the waste glue cup 6 to move horizontally, enabling the waste glue cup 6 to move below the glue outlet 54 of the irregular glue needle 5. This is used to collect the waste glue discharged from the dispensing pressure tank 3, preventing glue from dripping onto other components and causing damage.

[0044] Working principle:

[0045] 1. Positioning and starting: Servo motor 1 drives servo linear module 9 to move high-speed spindle motor 2 downward to the first position of the glue application point of inner hole 171 of product 17 to be glued. The frequency converter starts high-speed spindle motor 2 with 300Hz output, so that high-speed spindle motor 2 accelerates to 18000rpm within 5 seconds.

[0046] 2. Synchronous glue supply and dispensing: The glue tank air supply valve 8 drives the dispensing pressure tank 3 with a pressure of 1-3 bar. The glue is accurately dripped through the irregular glue needle 5 onto the upper surface of the inverted conical dispensing plate 11 near the center. The glue output is controlled by the pressure and the inner diameter of the irregular glue needle 5.

[0047] Under the action of centrifugal force, the glue spreads radially along the surface of the inverted conical glue-spreading disc 11, evenly covering the inner hole 171 of the product to be glued 17. The servo motor 1 retracts at a uniform speed of 0.5 mm / s, achieving precise control of the axial glue application range.

[0048] Perform the adhesive application test using the steps described above:

[0049] In this embodiment, the servo motor 1 drives the servo linear module 9 with a stroke of 200mm and a repeatability of ±0.02mm; the irregularly shaped glue needle 5 has an inner diameter of 0.21mm and is suitable for glue with a viscosity of 100-1000cps; the inverted conical glue-spinning disc 11 has a cone angle of 25° and a surface roughness Ra≤0.8μm. Actual measurements show that this device can form a uniform glue layer with a thickness of 10±1μm in a 10mm inner hole 171, improving coating efficiency by 70% compared to traditional processes.

[0050] The high-precision internal centrifugal glue-spinning device of this utility model has the following technical advantages:

[0051] (1) High-precision coating, the combination of micro-holes with 5 inner diameter of the irregular glue needle and pressure closed-loop control, the glue output error ≤ ±2%, and the uniformity of glue layer thickness in the inner hole reaches more than 95%.

[0052] (2) Anti-splash design: The inverted cone-shaped glue-splashing disc 11 structure makes the direction of centrifugal diffusion of glue at an obtuse angle to the direction of gravity, effectively avoiding glue dripping and contamination.

[0053] (3) Adaptive adjustment, servo cylinder displacement, spindle speed and glue supply pressure parameters are programmable and linked to adapt to glue application requirements of 10-50mm inner hole.

[0054] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the scope of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A high-precision internal centrifugal glue-spinning device, characterized in that: The system includes a support assembly, a servo motor, a high-speed spindle motor, a dispensing pressure tank, a module connecting plate, and an inverted conical glue-spinning disc. The servo linear module is vertically mounted on the support assembly. The servo motor is driven and connected to the top of the servo linear module. The high-speed spindle motor and the dispensing pressure tank are arranged parallel to each other on the front side of the module connecting plate. The high-speed spindle motor is directly fixed to the module connecting plate. The dispensing pressure tank is connected to the module connecting plate via a glue tank connecting plate. The high-speed spindle motor and the dispensing pressure tank are connected to the servo linear module via the module connecting plate. The servo motor drives the servo linear module, causing the high-speed spindle motor and the dispensing pressure tank to move synchronously up and down. The lower end of the high-speed spindle motor's shaft is equipped with an inverted conical glue-spinning disc. The lower end of the dispensing pressure tank is connected to a shaped glue needle, the glue-dispensing end of which extends to the upper surface of the inverted conical glue-spinning disc. During glue application, the inverted conical glue-spinning disc and the shaped glue needle are inserted into the inner hole of the product to be glued and can move axially along the inner hole.

2. The high-precision internal centrifugal glue-spinning device as described in claim 1, characterized in that: The irregularly shaped glue needle is generally a side-mounted "Z" shape, including a first connecting segment, a second connecting segment, and a third connecting segment connected in sequence. The first connecting segment is vertically arranged and has a conical glue barrel connecting part at the upper end. The lower end of the first connecting segment is connected to the right end of the second connecting segment, and the connection is made with an arc transition. The left end of the second connecting segment extends to the lower left, so that the second connecting segment forms an angle α with the horizontal direction. The left end of the second connecting segment is connected to the upper end of the third connecting segment, and the connection is made with an arc transition. The lower end of the third connecting segment extends downward to the inverted conical glue-spinning disc, and the glue outlet of the third connecting segment is close to the upper surface of the inverted conical glue-spinning disc.

3. The high-precision internal centrifugal glue-spinning device as described in claim 2, characterized in that: The included angle α ranges from 5° to 10°.

4. The high-precision internal centrifugal glue-spinning device as described in claim 2, characterized in that: It also includes a glue needle limiting plate, which is connected to the bottom of the glue bucket connecting plate. The front side of the bottom of the glue needle limiting plate is provided with a limiting boss, and the front surface of the limiting boss is provided with a limiting groove. The limiting groove is inclined, and the inclination angle is the same as the angle α formed between the second connecting section of the irregular glue needle and the horizontal direction. In use, the second connecting section is embedded in the limiting groove.

5. The high-precision internal centrifugal glue-spinning device as described in claim 1, characterized in that: The cone angle β of the inverted conical spinning disc is 15°-30°.

6. The high-precision internal centrifugal glue-spinning device as described in claim 1, characterized in that: It also includes a glue tank air supply valve, which is mounted on the bracket assembly and connects the glue dispensing pressure tank to the air source via an air pipe.

7. The high-precision internal centrifugal glue-spinning device according to any one of claims 1-6, characterized in that: It also includes a waste glue collection mechanism, which includes a waste glue cup, a glue cup cylinder, and a glue cup holder. The glue cup cylinder is horizontally fixed on the support assembly, and the glue cup holder is connected to the push rod at the left end of the glue cup cylinder. The waste glue cup is set on the glue cup holder, and the glue cup cylinder drives the waste glue cup to move horizontally, so that the waste glue cup can be moved to below the glue outlet of the irregular glue needle.

8. The high-precision internal centrifugal glue-spinning device as described in claim 1, characterized in that: The bracket assembly includes a base, a support frame, and a support plate. The support frame includes multiple profiles arranged horizontally and vertically. The bottom of the support frame is fixedly connected to the base. The support plate is fixedly connected to the front side of the support frame and is used to install the servo linear module and the glue tank air supply valve.

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