Suspension type baking device

Abstract

The utility model relates to the field of circuit board baking devices, in particular to a suspension type baking device which comprises a machine frame, a conveying mechanism, suspension clamping mechanisms and a clamping opening mechanism, each suspension clamping mechanism is provided with a side holding mechanism, and side holding clamps on the side holding mechanisms can skillfully separate two adjacent printed circuit boards. The phenomenon that the printed circuit boards are scorched or not fully dried due to contact is avoided, the drying quality is greatly improved, due to the fact that the side holding clamps can separate the two adjacent printed circuit boards, a smaller chain pitch can be selected, two sets of clamping jaws can be installed on each hanging and clamping mechanism to hang and clamp the two printed circuit boards at the same time, and the drying efficiency is improved. Therefore, the number of the suspension clamps is greatly increased, the drying efficiency of the tunnel furnace is greatly improved, and the production cost is remarkably reduced by improving the drying quality and the drying efficiency.

Description

Technical Field

[0001] The utility model relates to the field of circuit board baking devices, in particular to a hanging baking device. Background Art

[0002] With the rapid development of the electronics industry, printed circuit boards, as the core components of electronic equipment, have increasingly higher production efficiency and quality requirements. In the production process of printed circuit boards, ink drying and baking is one of the key links to ensure the quality of printed circuit boards. In order to improve production capacity and production efficiency, tunnel furnaces, as a continuous drying equipment, are widely used in the ink drying and baking process of printed circuit boards.

[0003] The tunnel oven for drying printed circuit boards generally adopts a chain conveyor to realize the automatic water drying operation. Compared with the traditional vertical oven, the tunnel oven not only significantly improves the work efficiency, but also reduces the labor intensity of workers. Through the conveyor device installed on the chain conveyor, the printed circuit board can be automatically fed into the tunnel oven for drying. This continuous production method makes the drying process of the printed circuit board more efficient and stable.

[0004] However, despite the excellent performance of tunnel ovens in the drying and baking of printed circuit board inks, the existing tunnel oven technology still has certain limitations:

[0005] 1. Drying efficiency problems caused by fixed chain pitch.

[0006] The existing tunnel furnace uses a chain conveyor to transport printed circuit boards. The number of printed circuit boards fixed on the chain conveyor is determined by the pitch of the chain, and the pitch of the chain is usually fixed, which leads to two problems: First, when the chain pitch is too large, the number of printed circuit boards that can be placed on the conveyor is reduced, which reduces the drying efficiency; second, when the chain pitch is too small, although the number of printed circuit boards can be increased, the too small spacing may cause adjacent printed circuit boards to contact and affect the drying effect. In order to ensure quality, the existing tunnel furnace chain pitch is usually too large and the efficiency is low.

[0007] 2. Drying quality problems caused by contact between the conveyor and the printed circuit board.

[0008] In existing tunnel ovens, the conveyor will inevitably come into contact with the printed circuit board, which may cause two problems: first, the printed circuit board at the contact point may be burnt due to excessive heat; second, the shielded part may not be fully dried, resulting in uneven drying.

[0009] In summary, although the existing tunnel oven has achieved certain results in the process of drying and baking the ink of the printed circuit board, it still has technical shortcomings in terms of chain pitch fixing and contact between the conveyor and the printed circuit board. Therefore, it is necessary to improve and optimize these technical shortcomings to improve the drying efficiency and product quality of the printed circuit board. Utility Model Content

[0010] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a hanging baking device, including a frame, a conveying mechanism, a hanging clamping mechanism and an opening clamping mechanism;

[0011] The conveying mechanism includes a motor, a reducer, a main shaft, a sprocket and a chain. The motor is fixedly connected to one end of the reducer, and the other end of the reducer is fixedly connected to the right side of the frame. The main shaft spans the left and right ends of the top of the frame and is fixedly connected to the output shaft of the reducer. The main shaft is fixedly connected to two left and right sprockets. The two chains are meshed with the sprockets. The motor drives the main shaft to drive the sprocket to rotate.

[0012] The clamping mechanism includes a main board, a lifting plate and a clamping cylinder. The main board is located at the rear side of the main shaft and is parallel to the main shaft. Both ends of the main board are fixedly connected to the frame respectively. The lifting plate is connected to the main board for sliding up and down. The clamping cylinder is fixedly connected to the lifting plate.

[0013] The clamping mechanism includes a clamping beam, claws, a side hugging part and a side pushing part. A clamping beam is fixedly connected between each link of the left and right chains. Two sets of claws are hinged on the clamping beam. Each clamping beam can clamp two printed circuit boards at the same time. Fixed blocks are also fixedly connected at both ends of the clamping beam. The side hugging part includes a rocker arm and a side hugging clamp. One end of the rocker arm is hinged to the fixed block, and the other end is fixedly connected to the side hugging clamp. Damping is provided at the hinged portion of the fixed block and the rocker arm. The side hugging clamp is provided with two clamping grooves, and the positions of the two clamping grooves correspond to the positions of the claws on the clamping beam. The side pushing part is slidably connected left and right on the rear side of the main board. A side push groove is provided at the end of the side push part. When the left and right side push parts slide toward the middle, the side push groove can push the rocker arm to move closer to the middle.

[0014] Furthermore, the clamping mechanism also includes a clamping block, which is fixedly connected to the clamping cylinder push rod, and the clamping block can perform a clamping action on the clamping claw located directly below it.

[0015] Furthermore, the rocker arms of two adjacent side hugging parts have different lengths, and the adjacent side hugging parts are arranged in a high and low state.

[0016] Furthermore, the two clamping grooves of the side clamp have larger outer openings and smaller inner openings.

[0017] Furthermore, in order to enhance the strength of the side hugging portion, the side hugging portion further includes a reinforcing plate, which is fixedly connected to the rocker arm.

[0018] Furthermore, the side thrust groove of the side thrust portion has a larger opening on the outside and a smaller opening on the inside, and a roller is movably connected to the rear end of the clamping groove. Preferably, the roller can be a bearing.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. Significantly improve drying quality:

[0021] In traditional tunnel ovens, the contact between the conveyor and the printed circuit board often leads to problems such as uneven drying and burning. However, the hanging baking device of the utility model effectively solves this problem by introducing a side-holding mechanism. Each hanging clamp mechanism is equipped with a side-holding mechanism. The side clamps on the side-holding mechanism can cleverly separate two adjacent printed circuit boards. During the high-temperature hot air drying process, the printed circuit boards and the side clamps are in intermittent contact, which can avoid the printed circuit boards from being burned or not fully dried due to long-term contact. The drying quality has been greatly improved, and the production quality of the printed circuit boards has been effectively guaranteed.

[0022] 2. Significantly improve drying efficiency:

[0023] The hanging baking device of the utility model adopts a non-standard chain design. The hanging clamp mechanism carried by each section of the chain is equipped with a side-holding mechanism to separate two adjacent printed circuit boards, so a smaller chain pitch can be selected. Each hanging clamp mechanism can also be equipped with two sets of claws to hang and clamp two printed circuit boards at the same time, which greatly increases the number of hanging clamps, thereby greatly improving the drying efficiency of the tunnel furnace. In continuous production, this design makes the drying process of printed circuit boards faster, saving a lot of production time for enterprises and improving overall production efficiency.

[0024] 3. Effectively reduce production costs:

[0025] The hanging baking device of the utility model achieves a significant reduction in production costs by improving the drying quality and drying efficiency. First, the improvement in drying quality reduces the number of scrapped products in the production process and reduces production costs. Second, due to the improvement in drying efficiency, more printed circuit boards can be dried per unit time, thereby reducing unit energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the drawings required for describing the specific implementation or the prior art will be briefly introduced below. Obviously, the drawings described below are only one implementation of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a schematic diagram of the overall structure of a hanging baking device;

[0028] Figure 2 It is a partial structural schematic diagram of a hanging baking device;

[0029] Figure 3 It is a schematic diagram of the side hugging structure;

[0030] Figure 4 1. It is a schematic diagram of the structure of the thrust unit;

[0031] Figure 5 It is a schematic diagram of the side hugging arrangement structure.

[0032] The markings in the attached drawings are: 1. frame; 2. conveying mechanism; 21. motor; 22. reducer; 23. main shaft; 24. sprocket; 25. chain; 3. hanging clamp mechanism; 31. hanging clamp beam; 32. claw; 33. fixing block; 34. side hugging part; 341. rocker arm; 342. reinforcing plate; 343. side hugging clamp; 344. clamping groove; 35. side pushing part; 351. side pushing groove; 352. roller; 4. opening clamp mechanism; 41. main board; 42. lifting plate; 43. opening clamp cylinder; 44. opening clamp block; 5. printed circuit board. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects achieved by the utility model easy to understand, the technical scheme in the specific implementation mode of the utility model is clearly and completely described below to further illustrate the utility model. Obviously, the specific implementation mode described is only a part of the implementation mode of the utility model, rather than all styles.

[0034] like Figure 1-5 As shown, the hanging baking device implemented by the utility model is composed of a frame 1, a conveying mechanism 2, a hanging clamping mechanism 3 and an opening clamping mechanism 4;

[0035] The conveying mechanism 2 includes a motor 21, a reducer 22, a main shaft 23, a sprocket 24 and a chain 25. The motor 21 is fixedly connected to one end of the reducer 22, and the other end of the reducer 22 is fixedly connected to the right side of the frame 1. The main shaft 23 spans the left and right ends of the top of the frame 1 and is fixedly connected to the output shaft of the reducer 22. The main shaft 23 is fixedly connected to two left and right sprockets 24. The two chains 25 are meshed with the sprockets 24. The motor 21 drives the main shaft 23 to drive the sprocket 24 to rotate. The pitch of the chain 25 can be selected according to the actual situation of the printed circuit board 5.

[0036] The clamping mechanism 4 includes a main board 41, a lifting plate 42, a clamping cylinder 43 and a clamping block 44. The main board 41 is located at the rear side of the main shaft 23 and is parallel to the main shaft 23. Both ends of the main board 41 are fixedly connected to the frame 1 respectively. The lifting plate 42 is connected to the main board 41 in an up-and-down sliding manner. The clamping cylinder 43 is fixedly connected to the lifting plate 42. The clamping block 44 is fixedly connected to the push rod of the clamping cylinder 43.

[0037] The clamping mechanism 3 includes a clamping crossbeam 31, a clamping claw 32, a side hugging part 34 and a side pushing part 35. A clamping crossbeam 31 is fixedly connected between each link of the left and right chains 25. Two sets of clamping claws 32 are hinged on the clamping crossbeam 31. Each clamping crossbeam 31 can clamp two printed circuit boards 5 at the same time. Fixed blocks 33 are also fixedly connected at both ends of the clamping crossbeam 31. The side hugging part 34 includes a rocker arm 341 and a side hugging clamp 343. One end of the rocker arm 341 is hinged to the fixed block 33, and the other end is fixedly connected to the side hugging clamp 343. In order to prevent the side hugging part 34 from being reset due to gravity after being pushed toward the printed circuit board 5, a damping is provided at the hinged portion of the fixed block 33 and the rocker arm 341. When baking is completed Afterwards, it is reset by the cylinder in the unloading section. The side clamp 343 is provided with two clamping grooves 344. The positions of the two clamping grooves 344 correspond to the positions of the claws 32 on the clamping beam 31. The side pusher 35 is slidably connected to the left and right sides of the rear side of the main board 41. The end of the side pusher 35 is provided with a side pusher groove 351. When a printed circuit board 5 is conveyed, the lifting plate 42 is controlled to descend by the system, and the clamping cylinder 43 pushes the clamping block 44 to open the claws 32 to clamp the upper end of the printed circuit board. At the same time, the side pusher 35 is controlled by the system to slide toward the middle, pushing the side clamping part 34 to clamp the printed circuit board 5 to the middle side, and the side clamping part 34 is pushed toward the printed circuit board 5 by the side pusher 35, thereby separating two adjacent printed circuit boards 5.

[0038] like Figure 5 As shown, when the pitch is very small, making the side clamp 343 smaller will reduce its strength. In order to meet the strength requirements of the side clamp 343 without interference, the rocker arms 341 of two adjacent side hugging parts 34 are of different lengths, and the adjacent side hugging parts 34 are arranged in a high and low state.

[0039] like Figure 3 As shown, in order to make the side hugging smoother, the two clamping grooves 344 of the side hugging clamp 343 have larger openings on the outside and smaller openings on the inside.

[0040] like Figure 3 As shown, in order to strengthen the side hugging portion 34 , the side hugging portion 34 further includes a reinforcing plate 342 , and the reinforcing plate 342 is fixedly connected to the rocker arm 341 .

[0041] like Figure 4As shown, in order to make the side thrust smoother, the side thrust groove 351 of the side thrust portion 35 has a large outer opening and a small inner opening. In order to reduce the wear between the side thrust portion 35 and the rocker arm 341, a roller 352 is also movably connected to the inner side of the clamping groove 344. Preferably, in order to reduce processing and facilitate procurement, the roller 352 in this embodiment adopts a bearing.

[0042] When the hanging baking device of the utility model is used, the printed circuit board 5 is sent to the hanging clamping mechanism 3 manually or by a robot, the lifting cylinder lowers the lifting plate 42 of the clamping mechanism 4, the clamping cylinder 43 pushes the jaws of the clamping claws 32 to open the clamping claws 32, and the clamping cylinder 43 is released after the printed circuit board 5 is inserted, and the printed circuit board 5 is clamped by the elastic force of the torsion spring of the clamping claws 32, and the lifting plate 42 of the clamping mechanism 4 is restored. At the same time, the side pushing part 35 pushes the side holding part 34 to hold the printed circuit board 5 under the action of the cylinder, and the front and rear printed circuit boards 5 are separated by the side holding clamp 343, and the clamped printed circuit board 5 is transported to the subsequent section by the chain 25.

[0043] The above describes the main technical features and basic principles of the utility model and the related advantages. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary specific implementations, and the utility model can be implemented in other specific forms without departing from the concept or basic features of the utility model. Therefore, no matter from which point of view, the above specific implementations should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the utility model.

[0044] In addition, it should be understood that although the present specification is described according to various implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation method may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A hanging baking device, characterized in that: It comprises a frame (1), a conveying mechanism (2), a hanging and clamping mechanism (3) and a clamping and opening mechanism (4); The conveying mechanism (2) comprises a motor (21), a reducer (22), a main shaft (23), a sprocket (24) and a chain (25); the motor (21) is fixedly connected to one end of the reducer (22); the other end of the reducer (22) is fixedly connected to the right side of the frame (1); the main shaft (23) spans the left and right ends of the top of the frame (1) and is fixedly connected to the output shaft of the reducer (22); the main shaft (23) is fixedly connected to two left and right sprockets (24); the two chains (25) are meshed with the sprockets (24); the motor (21) drives the main shaft (23) to drive the sprocket (24) to rotate; The clamping mechanism (4) comprises a main board (41), a lifting plate (42) and a clamping cylinder (43); the main board (41) is located at the rear side of the main shaft (23) and is parallel to the main shaft (23); both ends of the main board (41) are respectively fixedly connected to the frame (1); the lifting plate (42) is slidably connected to the main board (41) up and down; and the clamping cylinder (43) is fixedly connected to the lifting plate (42); The clamping mechanism (3) comprises a clamping crossbeam (31), a clamping claw (32), a side holding part (34) and a side pushing part (35). Each of the two opposite chain links of the left and right chains (25) is fixedly connected with a clamping crossbeam (31). Two groups of clamping claws (32) are hinged on the clamping crossbeam (31). Each clamping crossbeam (31) can clamp two printed circuit boards (5) at the same time. Both ends of the clamping crossbeam (31) are fixedly connected with fixed blocks (33). The side holding part (34) comprises a rocker arm (341) and a side holding clamp (343). One end of the rocker arm (341) and the fixed block The fixing block (33) is hinged, and the other end is fixedly connected to the side clamp (343). A damping is provided at the hinged portion between the fixing block (33) and the rocker arm (341). The side clamp (343) is provided with two clamping grooves (344). The positions of the two clamping grooves (344) correspond to the positions of the claws (32) on the hanging clamp crossbeam (31). The side push portion (35) is slidably connected to the rear side of the main board (41) on the left and right sides. The end of the side push portion (35) is provided with a side push groove (351). When the left and right side push portions (35) slide toward the middle, the side push groove (351) can push the rocker arm (341) to move closer to the middle.

2. The hanging baking device according to claim 1, characterized in that: The clamping mechanism (4) further comprises a clamping block (44), which is fixedly connected to a push rod of the clamping cylinder (43). The clamping block (44) can perform a clamping action on the clamping claw (32) located directly below the clamping block (44).

3. The hanging baking device according to claim 1, characterized in that: The rocker arms (341) of two adjacent side hugging portions (34) have different lengths, and the adjacent side hugging portions (34) are arranged in a high-low state.

4. The hanging baking device according to claim 1, characterized in that: The two clamping grooves (344) of the side clamp (343) have larger openings on the outside and smaller openings on the inside.

5. The hanging baking device according to claim 1, characterized in that: The side hugging portion (34) further comprises a reinforcing plate (342), and the reinforcing plate (342) is fixedly connected to the rocker arm (341).

6. The hanging baking device according to claim 1, characterized in that: The side pushing groove (351) of the side pushing portion (35) has a large opening on the outside and a small opening on the inside. The rear end of the clamping groove (344) is also movably connected to a roller (352).

7. The hanging baking device according to claim 6, characterized in that: The roller (352) is a bearing.

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