Automobile electronic grade patch NTC thermistor glue removal furnace

Abstract

This utility model relates to the technical field of automotive electronic-grade surface mount adhesive removal ovens, and discloses an automotive electronic-grade surface mount NTC thermistor adhesive removal oven, including an adhesive removal heating furnace. A closing door is rotatably connected to the front end of the heating furnace, and a central control device is installed at the front end of the closing door. An exhaust duct is fixedly connected to the top of the heating furnace and extends through it. A heater is installed at the bottom of the inner wall of the heating furnace. An electric hydraulic cylinder is fixedly connected to both the left and right ends of the heating furnace. The drive end of each electric hydraulic cylinder is connected to a clamping claw via a clamping assembly. Fans are installed on the bottom sides of both the front and rear ends of the heating furnace and extend through it. In this utility model, the internal stress of the thermistor is eliminated through a double-sided symmetrical radiant thermal field. This design shortens the single adhesive removal cycle and improves heating efficiency. Furthermore, the dual-axis coordinated control enables the jet head to form a spatial vector jet trajectory, enhancing the adhesion between the NTC thermistor patch and the return plate.

Description

Technical Field

[0001] This utility model relates to the field of automotive electronic-grade surface mount adhesive removal oven technology, and in particular to an automotive electronic-grade surface mount NTC thermistor adhesive removal oven. Background Technology

[0002] The automotive electronics-grade surface mount NTC thermistor debinding oven is a key piece of equipment used in the manufacture of precision electronic components (such as reflow boards). Its background stems from the automotive electronics industry's demand for highly reliable components. This equipment removes residual organic binders after thermistor molding through precise temperature and atmosphere control, ensuring a tight bond between the internal electrodes and the ceramic substrate. Through high-precision sensing technology and low-power design, it can ensure stable operation in complex environments while meeting the high-intensity and stringent requirements of the automotive industry. Its unique functions make it an important tool for the intelligent and connected development of modern automobiles.

[0003] In existing technologies, automotive electronic-grade surface mount NTC thermistor delamination ovens can only heat one side at a time, requiring operators to manually flip the components to heat the other side. This not only increases operation time and labor costs but may also reduce heating efficiency, thus affecting overall production efficiency and stability.

[0004] In response to this technical problem, this application proposes an automotive electronic-grade surface mount NTC thermistor debinding oven. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing an automotive electronic-grade surface mount NTC thermistor degassing oven. This oven eliminates internal stress in the thermistor through a double-sided symmetrical radiant heat field. This design shortens the single degassing cycle, improves heating efficiency, and enhances the adhesion between the NTC thermistor patch and the reflow plate through dual-axis coordinated control, enabling the jet head to form a spatial vector jet trajectory.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An automotive electronic-grade surface mount NTC thermistor descaling oven includes a descaling heating oven. A closing door is rotatably connected to the front end of the descaling heating oven, and a central control device is installed at the front end of the closing door. An exhaust duct is fixedly connected to and passes through the top of the descaling heating oven. A heater is installed at the bottom of the inner wall of the descaling heating oven. An electric hydraulic cylinder is fixedly connected to both the left and right ends of the descaling heating oven. The drive end of the electric hydraulic cylinder is connected to a clamping claw via a clamping assembly. Fans are installed and pass through the bottom sides of both the front and rear ends of the descaling heating oven. Fixed shells are fixedly connected to both the front and rear sides of the inner wall of the descaling heating oven. Air jets are connected to the left and right ends of the fixed shells via an adjustment assembly.

[0008] Furthermore, the clamping assembly includes a movable housing fixedly connected to one drive end of the electric hydraulic cylinder, and a rotating platform is rotatably connected to one end of each movable housing. The clamping claws are rotatably connected to the front and rear ends of the rotating platform, respectively.

[0009] Furthermore, each of the inner walls of the movable housing is fixedly connected to an electric hydraulic cylinder two, and the left end of the electric hydraulic cylinder two is rotatably connected to an adapter ring, and the outer wall of the adapter ring is rotatably connected to a gear two.

[0010] Furthermore, a motor is fixedly connected to the top of the inner wall of the movable shell, and a gear is fixedly connected to the drive end of the motor. The outer wall of the gear is meshed with the gear.

[0011] Furthermore, the left end of the adapter ring is rotatably connected to traction plates on both the front and rear sides, and the opposite ends of the traction plates are rotatably connected to the opposite ends of the clamping claws.

[0012] Furthermore, the adjustment assembly includes a second motor fixedly connected to both the left and right ends of the fixed housing, and an adjustment frame is fixedly connected to the drive end of the second motor on the right end.

[0013] Furthermore, a worm gear is fixedly connected to the drive end of the motor on the left, a worm wheel is meshed with the outer wall of the worm gear, an adjustment frame is fixedly connected to the inner wall of the worm wheel, and the bottom end of the jet head is fixedly connected to the top end of the adjustment frame.

[0014] Furthermore, both ends of the jet head are fixedly connected to a delivery pipe, and the other end of the delivery pipe is fixedly connected to the output end of the fan.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, after the user attaches the NTC thermistor patch to the reflux plate, the second electric hydraulic cylinder is activated. Through the adapter ring and traction plate, the clamping claws retract to hold the reflux plate. The first electric hydraulic cylinder drives the moving housing to rise and fall, bringing the reflux plate closer to the heater for heating. After one side is heated, the first electric hydraulic cylinder rises, and the first motor, through gears one and two, drives the adapter ring to flip the reflux plate, heating the other side of the patch and improving heating efficiency.

[0017] 2. In this invention, the starting fan supplies air to the jet head through the delivery pipe, heating the adhesive to flow along the grooves of the return plate substrate, promoting adhesion. The rotation of the second motor on the right side drives the second adjusting bracket to rotate within the fixed housing, causing the jet head to rotate along the Y-axis; the second motor on the left side drives the first adjusting bracket via a worm gear and worm wheel, causing the jet head to rotate along the X-axis, improving the flexibility of jet flow and enhancing the adhesion between the NTC thermistor patch and the return plate. Attached Figure Description

[0018] Figure 1 This is a perspective view of a descaling oven for automotive electronic-grade surface mount NTC thermistors proposed in this utility model.

[0019] Figure 2 This is a half-sectional view of the descaling heating furnace of a descaling furnace for automotive electronic-grade surface mount NTC thermistors proposed in this utility model;

[0020] Figure 3 This is a half-sectional view of the movable shell of an automotive electronic-grade surface mount NTC thermistor descaling oven proposed in this utility model;

[0021] Figure 4 This is a half-sectional view of the rotating table of a descaling oven for automotive electronic-grade surface mount NTC thermistors proposed in this utility model.

[0022] Figure 5 This is a half-sectional view of the blower of a glue removal oven for automotive electronic-grade surface mount NTC thermistors proposed in this utility model;

[0023] Figure 6 This is a two-half sectional view of the adjustment frame of the automotive electronic-grade surface mount NTC thermistor descaling oven proposed in this utility model.

[0024] Legend:

[0025] 1. Glue removal heating furnace; 2. Closing door; 3. Fan; 4. Adjusting frame one; 5. Heater; 6. Fixed shell; 7. Adjusting frame two; 8. Conveying pipe; 9. Electric hydraulic cylinder one; 10. Moving shell; 11. Rotary table; 12. Clamping claw; 13. Motor one; 14. Electric hydraulic cylinder two; 15. Gear one; 16. Adapter ring; 17. Gear two; 18. Traction plate; 19. Motor two; 20. Worm gear; 21. Worm wheel; 22. Jet nozzle; 23. Exhaust trough. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Reference Figures 1-3This utility model provides an embodiment of an automotive electronic-grade surface mount NTC thermistor descaling oven, comprising a descaling heating oven 1, a closing door 2 rotatably connected to the front end of the descaling heating oven 1, a central control device installed at the front end of the closing door 2, an exhaust vent 23 fixedly connected to the top of the descaling heating oven 1 and extending through it, a heater 5 installed at the bottom of the inner wall of the descaling heating oven 1, and electric hydraulic cylinders 9 fixedly connected to both ends of the descaling heating oven 1. The driving end of the electric hydraulic cylinders 9 is connected to clamping claws 12 via a clamping assembly. The clamping assembly includes a movable shell 10 fixedly connected to the driving end of the electric hydraulic cylinders 9, a rotating platform 11 rotatably connected to one end of each movable shell 10, and clamping claws 12 rotatably connected to the front and rear ends of the rotating platform 11 at opposite ends. Electric hydraulic cylinders 14 are fixedly connected to the bottom of the inner wall of each movable shell 10, and an adapter ring 16 rotatably connected to the left end of each electric hydraulic cylinder 14. (See reference...) Figure 4 The outer wall of the adapter ring 16 is rotatably connected to a gear 17. The top of the inner wall of the movable housing 10 is fixedly connected to a motor 13. The drive end of the motor 13 is fixedly connected to a gear 15. The outer wall of the gear 15 and the gear 17 are meshed. The front and rear sides of the left end of the adapter ring 16 are rotatably connected to traction plates 18. The opposite ends of the traction plates 18 are rotatably connected to the opposite ends of the clamping claws 12.

[0028] Specifically, the automated heating process of the automotive electronic-grade NTC thermistor debonding oven is as follows: After the operator loads the unencapsulated NTC thermistor onto the reflow plate, the central control unit activates the second electric hydraulic cylinder 14, which drives the adapter ring 16 to link with the traction plate 18, causing the clamping claws 12 at the rotating table 11 to synchronously retract inward, precisely clamping the edge of the reflow plate; then the first electric hydraulic cylinder 9 drives the moving shell 10 to descend vertically, keeping the reflow plate at a preset distance from the bottom heater 5, and performing the first debonding process under a nitrogen protective atmosphere. The PID temperature control module achieves a gradient temperature rise with an accuracy of ±1℃, from 80 to 400℃, ensuring that the organic adhesive is fully decomposed and avoiding thermal cracking of the ceramic substrate. After single-sided glue removal is completed, the electric hydraulic cylinder 9 automatically lifts the moving shell 10. At the same time, the motor 13 drives the gear 15 to mesh with the gear 17, which drives the adapter ring 16 to rotate the rotating table 11 180° via the traction plate 18. This achieves double-sided flipping and positioning of the return plate fixed by the clamping claw 12. Subsequently, the heater 5 synchronously triggers the secondary heating program, which eliminates the internal stress of the thermistor through the double-sided symmetrical radiant heat field. This design shortens the single glue removal cycle by 40% and meets the reliability verification requirements for temperature shock cycles in the standard, ensuring the stability of the vehicle electronic components throughout their entire life cycle.

[0029] Reference Figure 5 and Figure 6Fans 3 are installed on the bottom sides of both the front and rear ends of the glue removal heating furnace 1 and run through it. Fixed shells 6 are fixedly connected to both the front and rear sides of the inner wall of the glue removal heating furnace 1. Air jets 22 are connected to the left and right ends of the fixed shells 6 through an adjustment group. The adjustment group includes a second motor 19 fixedly connected to both the left and right ends of the fixed shells 6. An adjustment frame 7 is fixedly connected to the drive end of the second motor 19 on the right end. A worm gear 20 is fixedly connected to the drive end of the second motor 19 on the left end. A worm wheel 21 is meshed with the outer wall of the worm gear 20. An adjustment frame 4 is fixedly connected to the inner wall of the worm wheel 21. The bottom end of the air jet 22 is fixedly connected to the top end of the adjustment frame 4. A conveying pipe 8 is fixedly connected to both the left and right ends of the air jet 22. The other end of the conveying pipe 8 is fixedly connected to the output end of the fan 3.

[0030] Specifically: The adhesive flow system of the automotive electronic-grade NTC thermistor degassing oven adopts a multi-axis linkage design: after the high-pressure centrifugal fan 3 is started, the delivery pipe 8, controlled by PID constant temperature, delivers gas to the jet head 22 at a pressure of 0.2MPa, so that the molten adhesive flows evenly along the micron-level grooves of the return plate substrate, realizing the immersion adhesion of the NTC thermistor patch to the nickel-plated copper substrate. When the right servo motor 19 is started, it drives the adjustment frame 7 to rotate ±30° along the precision guide rail inside the fixed shell 6, synchronously linking the angle of the jet head 22; the left servo motor 19 drives the adjustment frame 4 through the worm gear 20 and worm wheel 21 reduction mechanism to achieve stepless adjustment of the X-axis from 0 to 90°. The dual-axis coordinated control makes the jet head 22 form a spatial vector spray trajectory. This structure, combined with real-time feedback data from a MEMS flow sensor, allows the adhesive layer thickness to be controlled within the range of 25±3μm. After thermosetting at 200℃, the shear strength is ≥18MPa, meeting automotive-grade vibration resistance requirements. The yield rate is increased to over 99.6%, conforming to process standards.

[0031] Working principle: When the user attaches the unpackaged NTC thermistor chip to the reflux plate, the central control device starts the second electric hydraulic cylinder 14, which drives the traction plate 18 through the adapter ring 16, causing the clamping claw 12 to retract inward at the rotating table 11. This clamps the reflux plate, and then the moving shell 10 driven by the first electric hydraulic cylinder 9 lifts and lowers the reflux plate, bringing it closer to the heater 5 for heating. After one side is heated, the first electric hydraulic cylinder 9 is then started to rise, and the first motor 13 drives the first gear 15 to drive the second gear 17, causing the adapter ring 16 to rotate through the traction plate 18 and the rotating table 11. This flips the reflux plate held by the clamping claw 12, allowing the NTC thermistor chip on the other side to be heated, thus improving heating efficiency.

[0032] The fan 3 is activated to supply air to the jet nozzle 22 through the delivery pipe 8, allowing the heated adhesive to flow along the grooves of the return plate substrate for adhesion. When the right motor 19 is activated, it drives the adjustment frame 7 to rotate within the fixed housing 6, causing the jet nozzle 22 to rotate relative to the whole structure along the Y-axis. When the left motor 19 is activated, it drives the worm gear 20 to drive the worm wheel 21, which in turn drives the adjustment frame 4 to rotate the jet nozzle 22 along the X-axis. This improves the start-up flexibility of the jet nozzle 22 during airflow guidance, enhancing the adhesion between the NTC thermistor patch and the return plate.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A glue removal oven for automotive electronic-grade surface mount NTC thermistors, comprising a glue removal heating oven (1), characterized in that: The front end of the glue removal heating furnace (1) is rotatably connected to a closed door (2), and a central control device is installed at the front end of the closed door (2). The top end of the glue removal heating furnace (1) is fixedly connected to an exhaust trough (23) that passes through it. A heater (5) is installed at the bottom of the inner wall of the glue removal heating furnace (1). Electric hydraulic cylinders (9) are fixedly connected to both the left and right ends of the glue removal heating furnace (1). The driving end of the electric hydraulic cylinders (9) is connected to a clamping claw (12) through a clamping assembly. Fans (3) are installed on the bottom sides of both the front and rear ends of the glue removal heating furnace (1) and pass through it. Fixed shells (6) are fixedly connected to both the front and rear sides of the inner wall of the glue removal heating furnace (1). Air jets (22) are connected to both the left and right ends of the fixed shells (6) through an adjustment assembly.

2. The automotive electronic-grade surface mount NTC thermistor debinding oven according to claim 1, characterized in that: The clamping assembly includes a movable shell (10) fixedly connected to the drive end of an electric hydraulic cylinder (9). Each movable shell (10) is rotatably connected to a rotating platform (11) at one end. The clamping claws (12) are rotatably connected to the front and rear ends of the rotating platform (11) at opposite ends.

3. The automotive electronic-grade surface mount NTC thermistor debinding oven according to claim 2, characterized in that: The bottom of the inner wall of the movable shell (10) is fixedly connected to an electric hydraulic cylinder (14), and the left end of the electric hydraulic cylinder (14) is rotatably connected to a transition ring (16), and the outer wall of the transition ring (16) is rotatably connected to a gear (17).

4. The automotive electronic-grade surface mount NTC thermistor debinding oven according to claim 2, characterized in that: The top of the inner wall of the movable shell (10) is fixedly connected to a motor (13), and the drive end of the motor (13) is fixedly connected to a gear (15). The outer wall of the gear (15) and the gear (17) are meshed.

5. The automotive electronic-grade surface mount NTC thermistor debinding oven according to claim 3, characterized in that: The adapter ring (16) has traction plates (18) rotatably connected to both the front and rear sides of its left end. The opposite ends of the traction plates (18) are rotatably connected to the opposite ends of the clamping claws (12).

6. The automotive electronic-grade surface mount NTC thermistor debinding oven according to claim 1, characterized in that: The adjustment group includes a second motor (19) fixedly connected to both the left and right ends of the fixed shell (6), and an adjustment frame (7) is fixedly connected to the drive end of the second motor (19) on the right end.

7. The automotive electronic-grade surface mount NTC thermistor debinding oven according to claim 6, characterized in that: The motor 2 (19) on the left end is fixedly connected to a worm (20), the outer wall of the worm (20) is meshed with a worm wheel (21), the inner wall of the worm wheel (21) is fixedly connected to an adjustment frame 1 (4), and the bottom end of the jet head (22) is fixedly connected to the top end of the adjustment frame 1 (4).

8. The automotive electronic-grade surface mount NTC thermistor debinding oven according to claim 1, characterized in that: Both ends of the jet head (22) are fixedly connected to the delivery pipe (8), and the other end of the delivery pipe (8) is fixedly connected to the output end of the fan (3).

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