Copper tube shell packaging curing tool with protection function

Abstract

The present application relates to the technical field of packaging curing device, specifically to a copper pipe shell packaging curing tool with protection function, which comprises a tool table, further comprising: a dividing frame rotatably connected to the tool table and intermittently rotating in a clockwise direction, the tool table is sequentially provided with a loading station, a glue injection station, a glue uniformizing station and a curing station, four curing modules are arrayed on the dividing frame, the curing module comprises a radial slide frame slidably connected to the dividing frame, an axial floating frame is slidably connected to the radial slide frame, a heating platform is rotatably connected to the radial slide frame, the heating platform is internally provided with a heating element, a copper pipe shell positioning groove is formed in the inner bottom of the heating platform, and a driving component is arranged at the glue injection station to intermittently and unidirectionally rotate the heating platform and drive the radial slide frame to reciprocally slide radially. The present application has the beneficial effects of: through integrated design and multi-station collaborative flow design, the technical problems of low efficiency and poor consistency caused by process dispersion in traditional packaging are solved.

Description

Technical Field

[0001] This invention relates to the field of encapsulation and curing equipment technology, specifically to a copper tube shell encapsulation and curing fixture with protective function. Background Technology

[0002] In the manufacturing process of semiconductor devices, especially power devices or optoelectronic devices with high reliability requirements, metal shells are often used for packaging to provide good mechanical protection, heat dissipation performance and electromagnetic shielding effect. Such packaging usually involves mounting the chip on a heat dissipation base inside the shell and using adhesives to fix and seal it through a series of processes such as glue injection, glue spreading, and curing. UV curable adhesives are widely used in this type of packaging due to their advantages such as fast curing speed and environmental friendliness.

[0003] However, existing copper tube packaging and curing processes and equipment still have many technical bottlenecks, which restrict further improvements in packaging efficiency, consistency, and product yield. Specific problems are as follows:

[0004] Existing technologies typically employ a split-station or manual operation mode, where key processes such as casing loading, adhesive injection, chip placement, adhesive homogenization, cover plate installation, and UV curing are completed at separate workstations or on separate equipment. The processes rely on manual handling and positioning. This mode not only results in long production cycles and low efficiency, but more critically, repeated manual intervention and repositioning introduce significant cumulative errors, making it difficult to guarantee the uniformity of the adhesive layer and the alignment accuracy between the chip and the cover plate. Ultimately, this affects the consistency of the thermal performance, mechanical reliability, and electrical performance of the packaged device. In addition, during the adhesive injection and UV curing process, the adhesive is prone to volatilization, generating harmful gases. At the same time, pollutants such as dust and moisture in the environment may also penetrate into the uncured adhesive layer. Existing equipment generally lacks effective local sealing and exhaust gas collection mechanisms, which not only endangers the health of operators but may also lead to the formation of bubbles, impurities, or surface oxidation and polymerization inhibition in the adhesive layer, resulting in incomplete curing, reduced bonding strength, or deterioration of insulation performance.

[0005] Based on this, the present invention provides a copper tube shell encapsulation and curing tool with protective function to solve the problems mentioned in the background art. Summary of the Invention

[0006] This invention addresses the technical problems existing in the prior art by providing a copper tube shell encapsulation and curing fixture with protective functions to solve the problems of discrete processes and low automation in existing curing fixtures.

[0007] The technical solution of this invention to solve the above-mentioned technical problems is as follows: A copper tube shell encapsulation and curing fixture with protective function, including a fixture table, and further comprising:

[0008] The indexing frame is rotatably connected to the tooling table and rotates intermittently. In a clockwise direction, the tooling table is sequentially equipped with a loading station, a glue injection station, a glue spreading station, and a curing station.

[0009] Four solidified modules are arrayed and mounted on the indexing frame;

[0010] The curing module includes a radial carriage that is slidably connected to the indexing frame, an axial floating frame that is slidably connected to the radial carriage, a heating platform that is rotatably connected to the radial carriage, a heating element built into the heating platform, and a copper tube shell positioning groove opened in the inner bottom of the heating platform.

[0011] The driving component, at the dispensing station, drives the heating stage to rotate intermittently in one direction and drives the radial slide to slide radially back and forth; at the glue-spreading station, it drives the heating stage to rotate in both directions; at the curing station and the glue-spreading station, it drives the axial floating frame to float axially and slide radially back and forth synchronously.

[0012] The execution pressure frame is height-adjustable and mounted on the tooling table. An ultrasonic transmitting unit is installed on the execution pressure frame at the position corresponding to the glue application station, a glue application component is installed at the position corresponding to the glue application station, and an active pressure plate is slidably connected at the position corresponding to the curing station. A pressure regulating cylinder is installed between the active pressure plate and the execution pressure frame. The glue application component is equipped with a negative pressure shield. A rotating shaft driven by a rotary motor is rotatably connected to the active pressure plate. An eccentric pressure head is fixed at an eccentric position on the bottom surface of the rotating shaft. A rolling pressure ball is embedded at the bottom end of the eccentric pressure head. A pressure sensing element is integrated inside the eccentric pressure head. A UV curing lamp cover is installed on the eccentric pressure head. Two negative pressure pumps are installed on the tooling table. The two negative pressure pumps are connected to the inner cavities of the negative pressure shield and the UV curing lamp cover, respectively.

[0013] Based on the above technical solution, the present invention can be further improved as follows.

[0014] As a preferred technical solution of the present invention, a PLC controller is fixedly installed on the end face of the tooling table, and a vertically arranged hydraulic lifting cylinder is installed between the tooling table and the execution pressure frame.

[0015] As a preferred embodiment of the present invention, the curing module includes a mandrel and a cam shaft rotatably connected to an indexing frame. An upper shaft, a middle shaft, and a bottom shaft are rotatably sleeved on the mandrel. Driven bevel gears are mounted on both the mandrel and the cam shaft, and the two driven bevel gears mesh orthogonally. An eccentric cam is fixedly mounted on the cam shaft. A floating roller is rotatably connected to the radial slide, and the eccentric cam abuts against the floating roller. A circular wheel is fixedly mounted on the upper shaft, and two arc-shaped lifting parts are arrayed on the circular wheel. A compensating roller is rotatably connected to the radial slide, and the two arc-shaped lifting parts alternately abut against the compensating roller, with different driving strokes for the two arc-shaped lifting parts on the compensating roller. The radial carriage is rotatably connected to a fixed shaft, an intermittent shaft, and two rotating wheels. A first elastic belt drives the bottom shaft and the intermittent shaft. A sector gear is fixedly mounted on the intermittent shaft. A forward and reverse meshing gear and an intermittent gear are respectively mounted on the fixed shaft. The sector gear meshes with the intermittent gear. A second elastic belt drives the central shaft. Both rotating wheels are driven by the second elastic belt. Along the circumferential direction, three hollow tooth arc surfaces and three sector-shaped transmission segments are arranged in an array on the rotating wheels. The three sector-shaped transmission segments alternately mesh with the forward and reverse meshing gears. The fixed shaft is linked to the heating platform. A floating spring is installed between the axial floating frame and the radial carriage.

[0016] As a preferred technical solution of the present invention, the axis of the floating roller is parallel to the axis of the cam shaft, the length of the floating roller is 5 to 7 times the width of the eccentric cam, the top of the fixed shaft is provided with a transmission sliding hole with an open top, the bottom surface of the heating platform is fixedly mounted with a sliding shaft, and a sliding section is fixedly provided on the sliding shaft and slidably connected to the transmission sliding hole. The cross-section of the sliding section and the sliding shaft are both regular hexagons.

[0017] As a preferred technical solution of the present invention, the central angles corresponding to the three hollow tooth arc surfaces on the rotating wheel are all 100°, and the central angles corresponding to the three sector transmission sections are 10°, 20° and 30° respectively. The two rotating wheels are symmetrically arranged with the vertical plane containing the axis of the fixed shaft as the axis.

[0018] As a preferred technical solution of the present invention, the central angle corresponding to the effective meshing arc segment on the sector gear is 60°, and both the first elastic band and the second elastic band are made of rubber and can elastically compensate for the radial displacement of the radial carriage.

[0019] As a preferred embodiment of the present invention, the driving component includes three power shafts rotatably connected to a tooling table. The three power shafts are respectively positioned corresponding to the dispensing station, the uniform dispensing station, and the curing station. Two variable frequency motors are fixedly mounted on the tooling table. An internal gear ring is rotatably mounted on the indexing frame. Synchronous belts are driven and connected to both variable frequency motors, and the two synchronous belts are respectively driven and connected to the indexing frame and the internal gear ring. External gears meshing with the internal gear ring are mounted on each of the three power shafts. The upper shaft and the three power shafts... Each of the power shafts is equipped with an upper gear, which meshes with the upper gear on the power shaft. Each of the mandrel, the glue-spreading station, and the curing station has a top gear on its power shaft. The top gear on the mandrel meshes with the top gear on the power shaft at the glue-spreading station and the curing station. Each of the bottom shaft and the glue-dispensing station has a bottom gear on its power shaft. The two bottom gears mesh at the glue-dispensing station. Each of the middle shaft and the curing station has an intermediate gear on its power shaft. The two intermediate gears mesh at the curing station.

[0020] As a preferred technical solution of the present invention, the dispensing assembly includes a glue box and a dispensing conduit fixedly mounted on the actuator frame. A glue pump is installed on the glue box, and the dispensing port of the glue pump is fixedly connected to the dispensing conduit. A negative pressure shield is slidably sleeved on the dispensing conduit, and a clamping spring is installed between the negative pressure shield and the actuator frame.

[0021] As a preferred technical solution of the present invention, the rotary motor is fixedly mounted on the execution pressure frame, a guide shaft is fixedly installed on the output shaft of the rotary motor, a guide hole with a top opening and slidingly connected to the guide shaft is fixedly opened on the rotary shaft, the cross-section of the guide shaft and the guide hole are both regular hexagonal, a corrugated cover is rotatably sleeved on the eccentric pressure head, and the corrugated cover is fixedly connected to the UV curing lamp cover.

[0022] As a preferred technical solution of the present invention, an elastic sealing ring is installed at the bottom of both the UV curing lamp cover and the negative pressure shield. The elastic sealing ring is made of silicone. A pressure sensor is installed at the connection between the UV curing lamp cover and the negative pressure shield and the negative pressure pump. The data terminal of the pressure sensor is connected to the PLC controller. A sealing ring that cooperates with the elastic sealing ring is rotatably connected to the heating platform.

[0023] The beneficial effects of this invention are:

[0024] 1. This invention solves the technical problems of low efficiency and poor consistency caused by discrete processes in traditional packaging through integrated design and multi-station collaborative flow. Specifically, this fixture seamlessly integrates multiple key processes such as loading, dispensing, uniform dispensing, and UV curing into a compact circulating system arranged around an indexing frame. Each copper tube shell to be packaged is fixed on an independent curing module with multi-degree-of-freedom movement capability. This module rotates intermittently with the indexing frame, precisely flowing through each functional station in sequence. This design realizes continuous flow production of positioning, dispensing, uniform dispensing, and curing, avoiding the cumulative errors and time waste caused by multiple manual handling and repeated positioning in traditional station-based operations.

[0025] 2. This invention effectively overcomes the problems of environmental pollution, uneven glue distribution, and unstable curing quality during the glue injection and curing process through the precise linkage of multi-dimensional dynamic action and local sealing protection. At the glue injection station, the driving component not only drives the heating platform to rotate intermittently, but also drives it to slide radially back and forth. Combined with the static glue injection of the dispensing head, a complex dynamic coverage trajectory is formed to ensure that the glue fills the complex inner cavity of the tube shell and the root of the pin without dead corners. At the same time, the negative pressure shield equipped with the glue injection component automatically seals the workpiece under the action of the compression spring, and forms a micro negative pressure environment in conjunction with the negative pressure pump. This achieves real-time synergy between dynamic glue injection and active protection. This synergistic effect can not only prevent glue evaporation and dust intrusion, but also use negative pressure to suppress glue overflow and promote its penetration into the fine gaps. At the curing station, the rotational pressure of the eccentric pressure head and the sealed negative pressure environment of the UV lamp cover also constitute a synergy, which not only ensures that the curing pressure is uniform and adjustable, but also isolates oxygen interference and ensures complete deep curing.

[0026] 3. This invention, through the introduction of intelligent sensing and adaptive compensation mechanisms, significantly improves the uniform coating effect and curing reliability, and solves the fine process problems such as bubble removal and stress control. At the uniform coating station, the forward and reverse rotation of the heating stage, the reciprocating motion of the radial carriage, and the high-frequency vibration of the ultrasonic transmitting unit constitute a composite uniform coating synergy of mechanical shearing and ultrasonic cavitation, which powerfully expels and breaks up air bubbles, promoting uniform coating spread. More importantly, the axial floating frame can adaptively compensate for changes in adhesive layer thickness under the action of the floating spring, avoiding poor adhesion. In the curing stage, the pressure sensing element integrated in the eccentric pressure head and the PLC controller form a closed loop, realizing adaptive and precise control of the pressure of the transparent cover plate, preventing overpressure damage or insufficient pressure. At the same time, the continuous micro-floating of the axial floating frame can offset the internal stress generated by the curing shrinkage of the adhesive in real time. This design, which deeply links process action, real-time sensing, and elastic compensation structure, enables the tooling to transcend the limitations of traditional equipment that can only execute preset programs. Attached Figure Description

[0027] Figure 1 A schematic diagram of a copper tube shell encapsulation and curing fixture with protective function;

[0028] Figure 2 This is a schematic diagram of the negative pressure pump and the indexing frame.

[0029] Figure 3 for Figure 2 A magnified schematic diagram of the partial structure at point A in the middle;

[0030] Figure 4 A cross-sectional structural diagram of the active pressure plate and indexing frame;

[0031] Figure 5 for Figure 4 A magnified schematic diagram of the local structure at point B;

[0032] Figure 6 for Figure 4 A magnified schematic diagram of the structure at point C in the middle;

[0033] Figure 7 for Figure 4 A magnified schematic diagram of the local structure at point D;

[0034] Figure 8 This is a structural diagram of the ultrasonic transmitting unit and the actuator frame;

[0035] Figure 9 This is a schematic diagram of the floating spring and indexing frame.

[0036] Figure 10 A schematic diagram of the structure of the compensating roller and intermittent gear.

[0037] The attached diagram lists the components represented by each number as follows:

[0038] 1. Tooling table; 2. Indexing frame; 3. Radial slide; 4. Axial floating frame; 5. Heating platform; 6. Copper tube shell positioning groove; 7. Actuating pressure frame; 8. Ultrasonic transmitting unit; 9. Active pressure plate; 10. Negative pressure cover; 11. Rotary motor; 12. Rotary shaft; 13. Eccentric pressure head; 14. Rolling pressure ball; 15. UV curing lamp cover; 16. Negative pressure pump; 17. PLC controller; 18. Hydraulic lifting cylinder; 19. Mandrel; 20. Cam shaft; 21. Upper shaft; 22. Middle shaft; 23. Bottom shaft; 24. Eccentric cam; 25. Floating roller; 26. Gear; 2 7. Arc-shaped lifting section; 28. Compensating roller; 29. ​​Fixed shaft; 30. Intermittent shaft; 31. Rotating wheel; 32. Sector gear; 33. Forward and reverse meshing gears; 34. Intermittent gear; 35. Sector-shaped transmission section; 36. Floating spring; 37. Sliding shaft; 38. Power shaft; 39. Internal gear ring; 40. External gear; 41. Upper gear; 42. Top gear; 43. Bottom gear; 44. Intermediate gear; 45. Glue box; 46. Glue dispensing conduit; 47. Compression spring; 48. Guide shaft; 49. Elastic sealing ring; 50. Pressure regulating push cylinder; 51. Bellows cover; 52. Sealing ring. Detailed Implementation

[0039] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0040] The present invention provides the following preferred embodiments, such as Figure 1-10 As shown, a copper tube shell encapsulation and curing fixture with protective function includes a fixture table 1, on which a PLC controller 17 is fixedly mounted. The PLC controller 17 is an S7-200SMART model. The fixture also includes:

[0041] Indexing frame 2 is rotatably connected to tooling table 1 and rotates intermittently;

[0042] In a preferred embodiment, the indexing frame 2 rotates clockwise intermittently by 45°;

[0043] The purpose of setting 45° instead of 90° is to provide pause time for loading the cover plate and chip;

[0044] Along the clockwise direction, the tooling table 1 is sequentially equipped with a loading station, a glue injection station, a glue spreading station, and a curing station;

[0045] Four solidification modules are arrayed and mounted on indexing frame 2;

[0046] The curing module includes a radial slide 3 that is slidably connected to the indexing frame 2, an axial floating frame 4 that is slidably connected to the radial slide 3, and a floating spring 36 that is installed between the axial floating frame 4 and the radial slide 3.

[0047] A heating platform 5 is rotatably connected to the radial carriage 3. The heating platform 5 has a built-in heating element, which is a PTC heater or a resistance wire, and the heating temperature range is 50-150℃.

[0048] The heating stage 5 has a copper tube shell positioning groove 6 at its inner bottom. The copper tube shell positioning groove 6 is used for the installation of the copper tube shell to be packaged. At the same time, the copper tube shell positioning groove 6 is provided with pin mounting holes that are compatible with the pin lines of the copper tube shell to be packaged.

[0049] The copper tube shell to be packaged has a chip cover plate mounting groove and a semiconductor heat sink. The chip is packaged and cured on the semiconductor heat sink. When the curing module is transferred from the dispensing station to the homogenizing station, the external loading robot arm completes the installation of the cured chip on the semiconductor heat sink. When the curing module is transferred from the homogenizing station to the curing station, the chip cover plate is installed in the cover plate mounting groove. The chip cover plate is made of transparent material.

[0050] By precisely matching the copper housing positioning groove 6 with the pin mounting hole, the copper housing to be packaged can be quickly positioned and installed, avoiding installation misalignment from affecting the subsequent packaging quality.

[0051] Meanwhile, in coordination with the intermittent rotation rhythm of the indexing frame 2, the external loading robotic arm accurately completes the step-by-step installation of the chip and chip cover at a specific workstation, forming an automated process connection of positioning, glue injection, chip installation, glue evenness, cover installation, and curing. This reduces errors caused by manual intervention, ensures the consistency of the installation position of each component, lays the foundation for subsequent glue uniformity and curing stability, and significantly improves the standardization of copper tube shell packaging.

[0052] The curing module includes a mandrel 19 and a cam 20 rotatably connected to the indexing frame 2. An upper shaft 21, a middle shaft 22, and a bottom shaft 23 are rotatably sleeved on the mandrel 19. Both the mandrel 19 and the cam 20 are equipped with driven bevel gears, which mesh orthogonally. An eccentric cam 24 is fixedly installed on the cam 20. A floating roller 25 is rotatably connected to the radial slide 3. The eccentric cam 24 and the floating roller 25 are in contact and connected. The axis of the floating roller 25 is parallel to the axis of the cam 20.

[0053] In a preferred embodiment, the length of the floating roller 25 is 6 times the width of the eccentric cam 24;

[0054] A circular wheel 26 is fixedly mounted on the upper shaft 21. Two arc-shaped lifting parts 27 are arranged in an array on the circular wheel 26. A compensating roller 28 is rotatably connected to the radial slide 3. The two arc-shaped lifting parts 27 alternately abut against the compensating roller 28, and the driving strokes of the two arc-shaped lifting parts 27 on the compensating roller 28 are different. A fixed shaft 29, an intermittent shaft 30 and two rotating wheels 31 are rotatably connected to the radial slide 3. A first elastic belt is connected between the bottom shaft 23 and the intermittent shaft 30. A sector gear 32 is fixedly mounted on the intermittent shaft 30. A forward and reverse meshing gear 33 and an intermittent gear 34 are respectively mounted on the fixed shaft 29. The sector gear 32 and the intermittent gear 34 are meshed. The central angle corresponding to the effective meshing arc segment on the sector gear 32 is 60°.

[0055] A second elastic belt is connected to the central shaft 22 for transmission, and both pulleys 31 are connected to the second elastic belt for transmission.

[0056] Both the first and second elastic bands are made of rubber, and both can elastically compensate for the radial displacement of the radial carriage 3.

[0057] The spindle 19 and the cam 20 are orthogonally meshed by the driven bevel gear, which converts the rotational motion into the eccentric rotation of the eccentric cam 24, thereby driving the floating roller 25 to drive the radial slide 3 to achieve stable radial reciprocating sliding. The length of the floating roller 25 is designed to be 6 times the width of the eccentric cam 24, which ensures the stability of the contact between the eccentric cam 24 and the floating roller 25 when the radial slide 3 moves radially, and avoids the interruption of the motion.

[0058] Meanwhile, the two arc-shaped lifting parts 27 with different driving strokes on the round wheel 26 alternately abut against the compensating roller 28, which can generate different radial displacements per unit time. Combined with the first and second elastic belts made of rubber, they can effectively absorb the displacement error of the radial carriage 3 and realize continuous transmission and elastic reset when the radial carriage 3 is displaced.

[0059] Along the circumferential direction, the rotating wheel 31 is arranged with three hollow tooth arc surfaces and three sector-shaped transmission sections 35. The three sector-shaped transmission sections 35 are alternately connected to the forward and reverse meshing gears 33. The fixed shaft 29 is linked with the heating platform 5.

[0060] The top of the fixed shaft 29 is provided with a transmission sliding hole with an open top. The bottom surface of the heating platform 5 is fixedly mounted with a sliding shaft 37. A sliding section that is slidably connected to the transmission sliding hole is fixedly provided on the sliding shaft 37. The cross-section of the sliding section and the sliding shaft 37 are both regular hexagonal.

[0061] The central angles corresponding to the three hollow tooth arc surfaces on the rotating wheel 31 are all 100°, and the central angles corresponding to the three sector transmission sections 35 are 10°, 20° and 30° respectively. The two rotating wheels 31 are symmetrically arranged with the vertical plane containing the axis of the fixed shaft 29 as the axis.

[0062] The fixed shaft 29 and the heating stage 5 are connected by a regular hexagonal sliding section and a transmission sliding hole, which ensures stable torque transmission and allows the heating stage 5 to float axially.

[0063] The three hollow toothed arc surfaces on the rotating wheel 31 alternately mesh with the sector transmission sections 35 with different central angles, and the forward and reverse meshing gears 33, together with the sector gear 32 and the intermittent gear 34, realize the intermittent unidirectional rotation and forward and reverse rotation of the heating platform 5.

[0064] Furthermore, within a single rotation cycle of the two rotating wheels 31, the reciprocating angle of the heating stage 5 undergoes three changes;

[0065] The driving component, at the dispensing station, drives the heating stage 5 to rotate intermittently in one direction and drives the radial slide 3 to slide radially back and forth. At the glue-spreading station, it drives the heating stage 5 to rotate in both directions. At the curing station and the glue-spreading station, it drives the axial floating frame 4 to float axially and slide radially back and forth synchronously.

[0066] The drive components include three drive shafts 38 rotatably connected to the tooling table 1. The three drive shafts 38 correspond to the dispensing station, the evenly dispensing station, and the curing station, respectively. Two variable frequency motors are fixedly mounted on the tooling table 1. An internal gear ring 39 is rotatably mounted on the indexing frame 2. Synchronous belts are connected to both variable frequency motors, and these two synchronous belts are respectively connected to the indexing frame 2 and the internal gear ring 39. External gears 40 that mesh with the internal gear ring 39 are mounted on each of the three drive shafts 38. Upper gears 41 are mounted on the upper shaft 21 and the three drive shafts 38. The upper gear 41 on the mandrel 19 meshes with the upper gear 41 on the power shaft 38. The mandrel 19, the power shaft 38 in the glue application station and the curing station are all equipped with top gears 42. The top gears 42 on the mandrel 19 mesh with the top gears 42 on the power shaft 38 in the glue application station and the curing station. The bottom shaft 23 and the power shaft 38 in the glue injection station are all equipped with bottom gears 43. The two bottom gears 43 mesh in the glue injection station. The middle shaft 22 and the power shaft 38 in the curing station are all equipped with intermediate gears 44. The two intermediate gears 44 mesh in the curing station.

[0067] Through the transmission design of two variable frequency motors in conjunction with synchronous belt, internal gear ring 39 and power shaft 38, the intermittent rotation of indexing frame 2 and the execution of actions at each station are achieved, which greatly reduces the number of drive components, simplifies the transmission structure of the equipment, and reduces the manufacturing cost and maintenance difficulty of the equipment.

[0068] The power shafts 38 of different workstations mesh with the corresponding shaft system of the curing module through dedicated gears, ensuring that each workstation only starts its dedicated action when the module arrives, achieving precise synchronization of workstation switching and action execution, and avoiding misalignment of action connections;

[0069] Variable frequency motors can flexibly adjust their speed to adapt to the packaging process requirements of copper tube shells of different specifications;

[0070] The execution pressure frame 7 is height-adjustable and mounted on the tooling table 1. A vertically mounted hydraulic lifting cylinder 18 is installed between the tooling table 1 and the execution pressure frame 7. An ultrasonic transmitting unit 8 is installed on the execution pressure frame 7 at the position corresponding to the glue-spreading station, a glue-spreading component is installed at the position corresponding to the glue-spreading station, and an active pressure plate 9 is slidably connected at the position corresponding to the curing station. A pressure regulating push cylinder 50 is installed between the active pressure plate 9 and the execution pressure frame 7. A negative pressure shield 10 is provided on the glue-spreading component. A rotating shaft 12 driven by a rotary motor 11 is rotatably connected to the active pressure plate 9. An eccentric pressure head 13 is fixedly mounted at an eccentric position on the bottom surface of the rotating shaft 12. A rolling pressure ball 14 is embedded at the bottom end of the eccentric pressure head 13. A pressure sensing element is integrated inside the eccentric pressure head 13. A UV curing lamp cover 15 is provided on the eccentric pressure head 13. Two negative pressure pumps 16 are installed on the tooling table 1. The two negative pressure pumps 16 are respectively connected to the inner cavity of the negative pressure shield 10 and the UV curing lamp cover 15.

[0071] The dispensing assembly includes a glue box 45 and a dispensing conduit 46 fixedly mounted on the actuator 7. A glue pump is installed on the glue box 45, and the dispensing port of the glue pump is fixedly connected to the dispensing conduit 46. A negative pressure shield 10 is slidably sleeved on the dispensing conduit 46, and a pressure spring 47 is installed between the negative pressure shield 10 and the actuator 7.

[0072] The rotary motor 11 is fixedly mounted on the actuator frame 7. A guide shaft 48 is fixedly mounted on the output shaft of the rotary motor 11. A guide hole with an opening at the top and slidably connected to the guide shaft 48 is fixedly opened on the rotating shaft 12. The cross-section of the guide shaft 48 and the guide hole are both regular hexagonal. A corrugated cover 51 is rotatably sleeved on the eccentric pressure head 13. The corrugated cover 51 is fixedly connected to the UV curing lamp cover 15.

[0073] Both the UV curing lamp cover 15 and the negative pressure shield 10 are equipped with elastic sealing rings 49 at their bottom ends. The elastic sealing rings 49 are made of silicone. Both the UV curing lamp cover 15 and the negative pressure shield 10 are equipped with air pressure sensors at their connection points with the negative pressure pump 16. The data terminals of the air pressure sensors are connected to the PLC controller 17. A sealing ring 52 that mates with the elastic sealing ring 49 is rotatably connected to the heating platform 5.

[0074] The transparent chip cover allows UV light to penetrate fully, enabling the adhesive to cure rapidly;

[0075] The intermittent unidirectional rotation of the heating platform 5, the radial reciprocating sliding of the radial carriage 3, and the sealing system of the negative pressure shield 10 in the glue injection station combine to form a synergy of dynamic glue injection and closed protection.

[0076] The intermittent unidirectional rotation of the heating stage 5 and the radial reciprocating sliding of the radial carriage 3 form a composite dynamic trajectory of rotation and translation, which enables the adhesive output from the dispensing conduit 46 to achieve a seamless coverage along the contour of the copper tube shell positioning groove 6 and the pin mounting hole.

[0077] Compared to traditional fixed dispensing or single rotary dispensing methods, this structure avoids problems such as adhesive buildup at the edge of the positioning groove and insufficient adhesive at the pin roots, significantly improving the consistency of dispensing amount. Especially for copper tube packages with semiconductor heat sinks, it can accurately fill the gap between the heat sink and the positioning groove, laying a uniform adhesive layer foundation for subsequent chip installation.

[0078] The sealing system consisting of negative pressure shield 10, silicone elastic sealing ring 49, and negative pressure pump 16 not only solves the problems of glue volatilization pollution and external dust intrusion during traditional glue injection, but also forms a stable micro-negative pressure environment through the linkage of air pressure sensor and PLC controller 17. This micro-negative pressure environment can suppress the overflow phenomenon of glue at the moment of glue injection, while accelerating the penetration of glue in the gap, avoiding local voids caused by glue surface tension, achieving a dual improvement in glue injection accuracy and encapsulation cleanliness, and reducing subsequent cleaning processes and defect rate.

[0079] In the spin coating station, the heating platform 5 rotates in both directions, the axial floating frame 4 floats synchronously, the radial reciprocating sliding and the ultrasonic emission unit 8 construct a multi-dimensional spin coating system with mechanical disturbance, ultrasonic action and adaptive compensation.

[0080] The forward and reverse rotation of the heating stage 5 and the reciprocating motion of the radial slide 3 create a bidirectional shearing force. Combined with the high-frequency vibration of the ultrasonic transmitting unit 8 (15-20kHz), the adhesive after dispensing can be transformed from static accumulation to dynamic diffusion. The cavitation effect of the ultrasonic waves can break up micron-sized bubbles in the adhesive, while the bidirectional mechanical motion removes the broken bubbles from the adhesive layer. At the same time, the adhesive is forced to spread along the chip mounting surface and the gap of the heat sink, which improves the uniformity of the adhesive layer thickness and avoids poor chip heat dissipation or stress concentration after curing due to uneven adhesive layer.

[0081] The synchronous axial floating of the axial floating frame 4 ensures that the adhesive can completely fill the tiny gaps and avoids the phenomenon of incomplete adhesion;

[0082] The synergy between ultrasonic action and mechanical motion shortens the homogenization time.

[0083] In the curing station, the integration of the synchronous movement of the axial floating frame 4, the eccentric pressure head 13, the rolling ball 14 assembly, and the UV curing lamp cover 15 sealing system forms a system with pressure self-adaptation, safety protection, and high-efficiency curing.

[0084] The eccentric design of the eccentric pressure head 13, combined with the forward and reverse rotation driven by the rotary motor 11, makes the pressure of the rolling pressure ball 14 on the transparent chip cover plate form a uniform circumferential pressure. The rolling friction of the rolling pressure ball 14 can completely avoid the problems of cover plate scratches and edge chipping caused by traditional rigid pressure plates.

[0085] Meanwhile, the closed-loop control of the pressure sensing element and the PLC controller 17 can automatically adjust the pressure according to the chip thickness, avoiding damage to the internal circuit of the chip due to overpressure, or poor adhesion between the adhesive layer and the cover plate due to insufficient pressure.

[0086] The sealed structure of the UV curing lamp cover 15 not only blocks the leakage of UV light and protects operators from UV damage, but also reduces oxygen interference during the curing process of the adhesive through a micro-negative pressure environment, avoiding incomplete curing caused by oxygen inhibition on the surface of the adhesive. Combined with the high light transmittance of the transparent chip cover, UV light can penetrate the cover and reach the adhesive layer directly, shortening the curing time and ensuring that the temperature resistance and moisture resistance of the adhesive layer meet the requirements of industrial-grade packaging.

[0087] The synchronous axial floating and radial reciprocating sliding of the axial floating frame 4 can compensate for the volume shrinkage during the curing process of the adhesive in real time.

[0088] When the adhesive shrinks, the floating frame drives the heating platform 5 to float slightly through the elastic force of the floating spring 36, which counteracts the tensile stress generated by the shrinkage and prevents the adhesive layer from cracking and the copper tube shell from deforming after curing.

[0089] The specific steps for using this invention are as follows:

[0090] The working principle and process of this invention revolve around the intermittent clockwise rotation of the indexing frame 2. The PLC controller 17 coordinates the actions of each component to achieve automated and continuous operation of copper tube shell encapsulation and curing.

[0091] First, at the loading station, the copper tube shell to be packaged is precisely positioned and installed through the copper tube shell positioning groove 6 and the pin mounting hole. Then, the indexing frame 2 drives the curing module to the glue injection station. The driving component is linked by the power shaft 38, gears and transmission belt, so that the heating platform 5 rotates intermittently in one direction and the radial slide 3 slides radially back and forth. The glue pump of the glue injection component injects glue through the glue dispensing conduit 46. At the same time, the negative pressure shield 10 adheres to the workpiece through the silicone elastic sealing ring 49 under the action of the compression spring 47, and forms a micro negative pressure environment with the negative pressure pump 16, which not only prevents glue evaporation and dust intrusion, but also avoids overflow and voids.

[0092] Next, the module is transferred to the glue-spreading station. The drive component drives the heating platform 5 to rotate in both directions. The axial floating frame 4 simultaneously achieves axial floating and radial reciprocating sliding. Combined with the high-frequency vibration of the ultrasonic transmitting unit 8, the glue is evenly spread and air bubbles are expelled. During this process, the external feeding robot arm completes the chip installation.

[0093] The module is then transferred to the curing station. First, an external robotic arm installs the transparent chip cover. The pressing frame 7 drives the active pressing plate 9 to press down through the hydraulic lifting cylinder 18. The rotary motor 11 drives the rotating shaft 12 and the eccentric pressing head 13 to rotate. The rolling pressing ball 14 applies pressure evenly to the cover. The pressure sensing element feeds back the pressure data to the PLC controller 17 in real time to achieve adaptive adjustment. At the same time, the UV curing lamp cover 15 is sealed by the elastic sealing ring 49 and forms a slight negative pressure through the negative pressure pump 16. The UV light penetrates the cover to cure the adhesive. The axial floating frame 4 compensates for the stress generated by the curing shrinkage of the adhesive through the floating spring 36. After the final encapsulation and curing are completed, the indexing frame 2 continues to rotate, and the above station process is repeated in the next cycle.

[0094] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A copper tube shell encapsulation and curing fixture with protective function, comprising a fixture table (1), characterized in that, Also includes: Indexing frame (2) is rotatably connected to tooling table (1) and rotates intermittently. In the clockwise direction, the tooling table (1) is provided with loading station, glue injection station, glue even station and curing station in sequence. Four solidification modules are arrayed and mounted on the indexing frame (2); The curing module includes a radial slide (3) that is slidably connected to the indexing frame (2), an axial floating frame (4) that is slidably connected to the radial slide (3), a heating platform (5) that is rotatably connected to the radial slide (3), a heating element that is built into the heating platform (5), and a copper tube shell positioning groove (6) that is opened in the inner bottom of the heating platform (5). The driving component drives the heating platform (5) to rotate intermittently in one direction and drives the radial slide (3) to slide radially back and forth at the glue dispensing station. At the glue dispensing station, it drives the heating platform (5) to rotate in both directions. At the curing station and the glue dispensing station, it drives the axial floating frame (4) to float axially and slide radially back and forth synchronously. An execution pressure frame (7) is vertically mounted on a tooling table (1). An ultrasonic transmitting unit (8) is installed on the execution pressure frame (7) at the position corresponding to the glue-spreading station, a glue-spreading assembly is installed at the position corresponding to the glue-spreading station, and an active pressure plate (9) is slidably connected at the position corresponding to the curing station. A pressure regulating cylinder (50) is installed between the active pressure plate (9) and the execution pressure frame (7). A negative pressure shield (10) is provided on the glue-spreading assembly. A rotary motor is rotatably connected to the active pressure plate (9). 11) A rotating shaft (12) is driven to rotate. An eccentric pressure head (13) is fixedly installed on the bottom eccentric position of the shaft (12). A rolling pressure ball (14) is embedded at the bottom end of the eccentric pressure head (13). A pressure sensing element is integrated inside the eccentric pressure head (13). A UV curing lamp cover (15) is provided on the eccentric pressure head (13). Two negative pressure pumps (16) are installed on the tooling table (1). The two negative pressure pumps (16) are connected to the inner cavity of the negative pressure shield (10) and the UV curing lamp cover (15) respectively.

2. The copper tube shell encapsulation and curing fixture with protective function according to claim 1, characterized in that, A PLC controller (17) is fixedly installed on the end face of the tooling table (1), and a vertically arranged hydraulic lifting cylinder (18) is installed between the tooling table (1) and the execution pressure frame (7).

3. The copper tube shell encapsulation and curing fixture with protective function according to claim 1, characterized in that, The curing module includes a mandrel (19) and a cam (20) rotatably connected to the indexing frame (2). An upper shaft (21), a middle shaft (22), and a bottom shaft (23) are rotatably sleeved on the mandrel (19). Driven bevel gears are installed on both the mandrel (19) and the cam (20). The two driven bevel gears mesh orthogonally. An eccentric cam (24) is fixedly installed on the cam (20). A floating roller (25) is rotatably connected to the radial slide (3). The eccentric cam (24) is in contact with the floating roller (25). A wheel (26) is fixedly mounted on the upper shaft (21). Two arc-shaped lifting parts (27) are arranged in an array on the wheel (26). A compensating roller (28) is rotatably connected to the radial carriage (3). The two arc-shaped lifting parts (27) alternately contact the compensating roller (28), and the driving strokes of the two arc-shaped lifting parts (27) on the compensating roller (28) are different. A fixed shaft (29), an intermittent shaft (30), and two rotating wheels (31) are rotatably connected to the slide (3). A first elastic belt is connected between the bottom shaft (23) and the intermittent shaft (30). A sector gear (32) is fixedly installed on the intermittent shaft (30). A forward and reverse meshing gear (33) and an intermittent gear (34) are respectively installed on the fixed shaft (29). The sector gear (32) and the intermittent gear (34) are meshed. A second elastic belt is connected to the central shaft (22). Both rotating wheels (31) are connected to the second elastic belt. Along the circumferential direction, three hollow tooth arc surfaces and three sector-shaped transmission sections (35) are arranged in an array on the rotating wheel (31). The three sector-shaped transmission sections (35) are alternately meshed with the forward and reverse meshing gears (33). The fixed shaft (29) is linked with the heating platform (5). A floating spring (36) is installed between the axial floating frame (4) and the radial slide (3).

4. The copper tube shell encapsulation and curing fixture with protective function according to claim 3, characterized in that, The axis of the floating roller (25) is parallel to the axis of the cam (20). The length of the floating roller (25) is 5 to 7 times the width of the eccentric cam (24). The top of the fixed shaft (29) is provided with a transmission sliding hole with an open top. The bottom surface of the heating platform (5) is fixedly equipped with a sliding shaft (37). A sliding section that is slidably connected to the transmission sliding hole is fixedly provided on the sliding shaft (37). The cross-section of the sliding section and the sliding shaft (37) are both regular hexagons.

5. The copper tube shell encapsulation and curing fixture with protective function according to claim 4, characterized in that, The central angles of the three hollow tooth arc surfaces on the rotating wheel (31) are all 100°, and the central angles of the three fan-shaped transmission sections (35) are 10°, 20° and 30° respectively. The two rotating wheels (31) are symmetrically arranged with the vertical plane containing the axis of the fixed shaft (29) as the axis.

6. The copper tube shell encapsulation and curing fixture with protective function according to claim 5, characterized in that, The central angle corresponding to the effective meshing arc segment on the sector gear (32) is 60°. The first elastic band and the second elastic band are both made of rubber and can elastically compensate for the radial displacement of the radial carriage (3).

7. The copper tube shell encapsulation and curing fixture with protective function according to claim 5, characterized in that, The driving component includes three power shafts (38) rotatably connected to the tooling table (1). The three power shafts (38) are respectively set to the glue injection station, the glue evenness station, and the curing station. Two variable frequency motors are fixedly installed on the tooling table (1). An internal gear ring (39) is rotatably installed on the indexing frame (2). Synchronous belts are driven to both of the two variable frequency motors. The two synchronous belts are driven to the indexing frame (2) and the internal gear ring (39) respectively. External gears (40) that mesh with the internal gear ring (39) are installed on each of the three power shafts (38). Upper gears (41) are installed on the upper shaft (21) and the three power shafts (38). The upper gear (41) on the mandrel (19) meshes with the upper gear (41) on the power shaft (38). The mandrel (19), the power shaft (38) in the glue application station and the curing station are all equipped with top gears (42). The top gears (42) on the mandrel (19) mesh with the top gears (42) on the power shaft (38) in the glue application station and the curing station. The bottom shaft (23) and the power shaft (38) in the glue injection station are all equipped with bottom gears (43). The two bottom gears (43) mesh in the glue injection station. The middle shaft (22) and the power shaft (38) in the curing station are all equipped with intermediate gears (44). The two intermediate gears (44) mesh in the curing station.

8. The copper tube shell encapsulation and curing fixture with protective function according to claim 1, characterized in that, The dispensing assembly includes a glue box (45) and a dispensing conduit (46) fixedly mounted on the actuator (7). A glue pump is installed on the glue box (45), and the dispensing port of the glue pump is fixedly connected to the dispensing conduit (46). A negative pressure shield (10) is slidably sleeved on the dispensing conduit (46), and a pressure spring (47) is installed between the negative pressure shield (10) and the actuator (7).

9. The copper tube shell encapsulation and curing fixture with protective function according to claim 1, characterized in that, The rotary motor (11) is fixedly mounted on the execution pressure frame (7). A guide shaft (48) is fixedly mounted on the output shaft of the rotary motor (11). A guide hole with a top opening and sliding connection with the guide shaft (48) is fixedly opened on the rotating shaft (12). The cross-section of the guide shaft (48) and the guide hole are both regular hexagonal. A corrugated cover (51) is rotatably sleeved on the eccentric pressure head (13). The corrugated cover (51) is fixedly connected to the UV curing lamp cover (15).

10. A copper tube shell encapsulation and curing fixture with protective function according to claim 1, characterized in that, The bottom ends of the UV curing lamp cover (15) and the negative pressure shield (10) are both equipped with elastic sealing rings (49). The elastic sealing rings (49) are made of silicone. Pressure sensors are installed at the connection points between the UV curing lamp cover (15) and the negative pressure shield (10) and the negative pressure pump (16). The data terminals of the pressure sensors are connected to the PLC controller (17). A sealing ring (52) that cooperates with the elastic sealing ring (49) is rotatably connected on the heating platform (5).

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