Printed circuit board processing oven

Abstract

A circuit board to be dried is placed in a feeding conveying device to be conveyed, then one side of the circuit board is clamped into a clamping groove in a long-strip-shaped base, the long-strip-shaped base and the circuit board are conveyed into the drying oven through a chain, in the conveying process, a rotating shaft is limited through an orienting assembly, and the rotating shaft is fixed through a fixing assembly; when the rotating shaft is conveyed to the steering assembly along with the chain, the rotating shaft is separated from the orientation assembly, and the rotating shaft is driven to rotate by 90 degrees through the steering assembly, so that the front side and the back side of the circuit board respectively face the heating devices on the left side and the right side, and the two sides of the circuit board are uniformly heated; and when the rotating shaft is conveyed to the steering assembly at the rear end, the rotating shaft is rotated by 90 degrees again, the long-strip-shaped base is turned to be arranged in a left-right extending mode from a front-back extending mode, then the circuit board on the long-strip-shaped base can be conveyed to the discharging conveying device in a flat lying mode, automatic drying is achieved, and the drying efficiency is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit board processing, and particularly relates to an oven for processing printed circuit boards. Background Art

[0002] After traditional circuit board etching is completed, first, the circuit board needs to be thoroughly cleaned using a special cleaning agent or a mild detergent to remove residues and impurities on the circuit board, and then subsequent drying treatment is carried out.

[0003] When drying a circuit board in an existing circuit board oven, the circuit board is placed in a fixed position, and the heat source of the oven is also fixed. This will cause the side of the circuit board close to the heat source to be heated faster, while the side facing away from the heat source is heated slower, resulting in uneven heating on both sides of the circuit board and low drying efficiency. Summary of the Invention

[0004] The present invention aims to solve at least one of the problems existing in the related art to a certain extent. For this purpose, the present invention provides an oven for processing printed circuit boards.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An oven for processing printed circuit boards includes a feeding conveyor device, an oven, and a discharging conveyor device arranged in sequence from front to back. Feed inlets and discharge outlets are respectively arranged on the front and rear sides of the oven, and a rack is arranged inside the oven. Heating devices are arranged on both the left and right sides of the rack. A chain conveyor device is arranged on the rack. The chain conveyor device includes a sprocket arranged front and back and a chain sleeved on the two sprockets. A plurality of fixing components for fixing the circuit board are evenly arranged on the chain. The fixing component includes an L-shaped frame arranged on the chain. A rotating shaft is rotatably installed on the L-shaped frame. A long strip seat is arranged at the outer end of the rotating shaft. A card slot for clamping the circuit board is arranged on the outer side of the long strip seat. Among them, the chain is successively divided into a front arc conveying section, an upper conveying section, a rear arc conveying section, and a lower conveying section. A guiding component is also arranged on the rack. The inner end of the rotating shaft is connected to the guiding component. When the rotating shaft follows the chain for conveying, the guiding component can limit the rotation of the rotating shaft. Steering components are respectively arranged at the front and rear ends of the upper conveying section on the guiding component. When the rotating shaft follows the chain and conveys to the steering component, the rotating shaft is separated from the guiding component, and the steering component drives the rotating shaft to rotate 90°.

[0007] In some embodiments, when the rotating shaft is located in the upper conveying section, the long strip seat extends in the front-rear direction. When the rotating shaft is located in the front arc conveying section, the rear arc conveying section, and the lower conveying section, the long strip seat extends in the left-right direction.

[0008] In some embodiments, two sets of the chain conveying devices are arranged at an upper and lower interval, and a lifting mechanism capable of driving the frame to lift up and down is arranged in the oven.

[0009] In some embodiments, extension plates are arranged at the four corners of the frame, and cylinders are connected to each of the extension plates.

[0010] In some embodiments, the orientation assembly includes a runway-shaped flange arranged on the frame and located on one side of the chain. A rectangular column is arranged at the inner end of the rotating shaft, and one side of the rectangular column abuts against the runway-shaped flange.

[0011] In some embodiments, the steering assembly includes a notch arranged on one side of the runway-shaped flange. A rack is arranged at the lower end of the notch, and a gear is arranged at the lower end of the rectangular column. When the rotating shaft is conveyed in the notch, the rectangular column is separated from the runway-shaped flange, and the gear meshes with the rack.

[0012] In some embodiments, the heating device is arranged on the frame.

[0013] In some embodiments, a motor is arranged on one of the sprockets, and the motor is arranged on the frame.

[0014] In some embodiments, chamfers are provided at the outer end corners of the card slot.

[0015] In some embodiments, limiting flanges extending outwards are arranged at both ends of the card slot.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The circuit board to be dried is placed in the feeding and conveying device for conveying. Then, one side of the circuit board is clamped into the card slot on the long strip seat, and the long strip seat and the circuit board are conveyed into the oven through the chain. During the conveying process, the rotating shaft is restricted by the orientation assembly, so that the long strip seat and the circuit board remain stationary. When the rotating shaft follows the chain and is conveyed to the steering assembly, the rotating shaft is separated from the orientation assembly, and the steering assembly drives the rotating shaft to rotate 90°. As a result, the long strip seat, which was originally arranged to extend left and right, is turned to extend front and back, so that the front and back sides of the circuit board face the heating devices on the left and right sides respectively, enabling the two sides of the circuit board to be heated evenly. When the rotating shaft is conveyed to the steering assembly at the rear end, the rotating shaft rotates 90° again, and the long strip seat, which was originally arranged to extend front and back, is turned to extend left and right. Furthermore, the circuit board on the long strip seat can be conveyed flatly to the discharging and conveying device, realizing automatic drying and greatly improving the drying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional schematic diagram of the present invention;

[0018] Figure 2Schematic cross-sectional view of the whole of the present invention;

[0019] Figure 3 Schematic cross-sectional view of the oven of the present invention;

[0020] Figure 4 Schematic view of the chain conveying device of the present invention disposed between two heating devices;

[0021] Figure 5 One of the schematic views of the circuit board of the present invention when following the chain for conveying;

[0022] Figure 6 Another schematic view of the circuit board of the present invention when following the chain for conveying;

[0023] Figure 7 For the present invention Figure 6 Enlarged schematic view of part A. Specific embodiments

[0024] The following specific implementation content provides multiple different embodiments or examples for implementing the present invention. Of course, these are only embodiments or examples and are not intended to be restrictive. Additionally, repeated reference numerals may be used in different embodiments, such as repeated numbers and / or letters. These repetitions are for the purpose of simply and clearly describing the present invention and do not represent a specific relationship between the different embodiments and / or structures discussed.

[0025] As Figures 1 - 7 shown, a printed circuit board processing oven includes a feeding conveying device 1, an oven 2, and a discharging conveying device 3 that are sequentially arranged from front to back. Feed inlets 11 and a discharge outlet 12 are respectively arranged on the front and rear sides of the oven 2. A frame body 4 is arranged inside the oven 2. Heating devices 13 are arranged on the left and right sides of the frame body 4. A chain conveying device is arranged on the frame body 4. The chain conveying device includes a sprocket 5 arranged front and back and a chain 6 sleeved on the two sprockets 5. A plurality of fixing components for fixing the circuit board 100 are evenly arranged on the chain 6. The fixing component includes an L-shaped frame 7 arranged on the chain 6. A rotating shaft 8 is rotatably installed on the L-shaped frame 7. A long strip seat 9 is arranged at the outer end of the rotating shaft 8. A card slot 10 for clamping the circuit board 100 is arranged on the outer side of the long strip seat 9. Among them, the chain 6 is sequentially divided into a front arc conveying section 61, an upper conveying section 62, a rear arc conveying section 63, and a lower conveying section 64. A guiding component is further arranged on the frame body 4. The inner end of the rotating shaft 8 is connected to the guiding component. When the rotating shaft 8 follows the chain 6 for conveying, the guiding component can limit the rotation of the rotating shaft 8. Steering components are respectively arranged at the front and rear ends of the upper conveying section 62 on the guiding component. When the rotating shaft 8 follows the chain 6 and conveys to the steering component, the rotating shaft 8 is separated from the guiding component, and the steering component drives the rotating shaft 8 to rotate by 90°.

[0026] When drying the circuit board according to the above structure, the circuit board 100 to be dried is placed on the feeding conveyor device 1 for transportation. Then, one side of the circuit board 100 is clamped into the card slot 10 on the long strip seat 9, and the long strip seat 9 and the circuit board 100 are transported into the oven 2 through the chain 6. During the transportation process, the rotation shaft 8 is restricted by the orientation component, so that the long strip seat 9 and the circuit board 100 remain stationary. When the rotation shaft 8 follows the chain 6 and is transported to the steering component, the rotation shaft 8 is disengaged from the orientation component, and the rotation shaft 8 is driven by the steering component to rotate 90°. As a result, the long strip seat 9, which was originally arranged to extend left and right, is turned to extend forward and backward, enabling the front and back sides of the circuit board to face the heating devices on the left and right sides respectively, so that both sides of the circuit board 100 are evenly heated. When the rotation shaft 8 is transported to the steering component at the rear end, the rotation shaft 8 rotates 90° again, and the long strip seat 9, which was originally arranged to extend forward and backward, is turned to extend left and right. Thus, the circuit board 100 on the long strip seat 9 can be transported flatly to the discharging conveyor device 3, realizing automatic drying and greatly improving the drying efficiency.

[0027] See Figure 3 、 Figure 6 As shown in the figure, when the rotation shaft 8 is located at the upper conveying section 62, the long strip seat 9 extends in the front-back direction. When the rotation shaft 8 is located at the front arc conveying section 61, the rear arc conveying section 63, and the lower conveying section 64, the long strip seat 9 extends in the left-right direction. When the long strip seat 9 extends in the left-right direction, the card slot 10 of the long strip seat 9 located on the front arc conveying section 61 can be aligned with the feeding conveyor device 1. When the circuit board 100 on the feeding conveyor device 1 is transported to the end, one side of the circuit board 100 can directly enter the card slot 10, and then the chain 6 transports it, and the long strip seat 9 is transported to the upper conveying section 62 for drying work. When the long strip seat 9 extends in the front-back direction, the two sides of the circuit board 100 on the long strip seat 9 face the heating devices 13 on both sides respectively.

[0028] See Figures 2 - 4 As shown in the figure, two sets of chain conveying devices are arranged at intervals up and down. An elevating mechanism capable of driving the frame 4 to move up and down is arranged in the oven 2. Extension plates 41 are arranged at the four corners of the frame 4, and air cylinders 42 are connected to each of the extension plates 41.

[0029] That is to say, when the upper set of chain conveying devices is full of circuit boards 100, the frame 4 can be driven by the air cylinder 42 to move upward. At this time, the lower chain conveying device can be loaded, and the circuit boards on the upper chain conveying device can be dried, greatly improving the drying efficiency and quality.

[0030] See Figure 6 、 Figure 7As shown, the orientation component includes a runway-shaped flange 51 disposed on the frame body 4 and on one side of the chain 6. A rectangular column 52 is provided at the inner end of the rotating shaft 8, and one side of the rectangular column 52 abuts against the runway-shaped flange 51. The shape of the runway-shaped flange 51 is correspondingly set to the shape of the chain 6. When the chain 6 drives the rotating shaft 8 to move and convey, the rectangular column 82 on the rotating shaft 8 will always fit and abut against the runway-shaped flange 51.

[0031] Further, the steering component includes a notch 66 disposed on one side of the runway-shaped flange 51. A rack 67 is provided at the lower end of the notch 66, and a gear 68 is provided at the lower end of the rectangular column 52. When the rotating shaft 8 is conveyed in the notch 61, the rectangular column 52 is separated from the runway-shaped flange 51, and the gear 68 meshes with the rack 67. When the rotating shaft 8 follows the chain 6 and is conveyed through the notch 61, the rectangular column 52 on the rotating shaft 8 is separated from the runway-shaped flange 51, and at this time the gear 68 meshes with the rack 67. The gear 68 drives the rectangular column 52 and the rotating shaft 8 to rotate. After the rotating shaft 8 rotates 90°, the gear 68 is separated from the rack 67, and the rectangular column 52 fits again on one side of the runway-shaped flange 51, thereby restricting the rotating shaft 8 again.

[0032] See Figure 3 、 Figure 4 As shown, the heating device 13 is disposed on the frame body 4.

[0033] A motor 81 is provided on one of the sprockets 5, and the motor 81 is disposed on the frame body 4.

[0034] In order to facilitate the smooth entry of the circuit board 100 into the card slot 10, chamfers are provided at the outer end corners of the card slot 10.

[0035] Limiting flanges 92 extending outward are provided at both ends of the card slot 10 to further improve the stability of the circuit board 100 when it is in the card slot 10.

[0036] Combined with the drawings and the above display and description of the basic principles, main features and advantages of the present invention, those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A printed circuit board processing oven, characterized in that: It includes a feeding conveyor device (1), an oven (2), and a discharging conveyor device (3) arranged in sequence from front to back. The front and back sides of the oven (2) are respectively provided with a feeding port (11) and a discharging port (12), and a rack (4) is arranged inside the oven (2). Heating devices (13) are arranged on both the left and right sides of the rack (4). A chain conveyor device is arranged on the rack (4). The chain conveyor device includes a sprocket (5) arranged front and back and a chain (6) sleeved on the two sprockets (5). A number of fixing components for fixing the circuit board (100) are evenly arranged on the chain (6). The fixing component includes an L-shaped frame (7) arranged on the chain (6). A rotating shaft (8) is rotatably installed on the L-shaped frame (7). A long strip seat (9) is arranged at the outer end of the rotating shaft (8). A card slot (10) for clamping the circuit board (100) is arranged on the outer side of the long strip seat (9). Among them, the chain (6) is successively divided into a front arc conveying section (61), an upper conveying section (62), a rear arc conveying section (63), and a lower conveying section (64). A guiding component is also arranged on the rack (4). The inner end of the rotating shaft (8) is connected to the guiding component. When the rotating shaft (8) is conveyed along with the chain (6), the guiding component can limit the rotation of the rotating shaft (8). Steering components are respectively arranged at the front and rear ends of the upper conveying section (62) on the guiding component. When the rotating shaft (8) is conveyed along with the chain (6) to the steering component, the rotating shaft (8) is separated from the guiding component, and the steering component drives the rotating shaft (8) to rotate 90°.

2. The printed circuit board processing oven according to claim 1, wherein: When the rotating shaft (8) is located in the upper conveying section (62), the long strip seat (9) extends along the front-rear direction. When the rotating shaft (8) is located in the front arc conveying section (61), the rear arc conveying section (63), and the lower conveying section (64), the long strip seat (9) extends along the left-right direction.

3. A printed circuit board processing oven according to claim 1, characterized in that: Two groups of the chain conveyor devices are arranged at an upper and lower interval. A lifting mechanism capable of driving the rack (4) to lift up and down is arranged in the oven (2).

4. A printed circuit board processing oven according to claim 3, wherein: Extension plates (41) are arranged at the four corners of the rack (4), and cylinders (42) are connected to each of the extension plates (41).

5. A printed circuit board processing oven according to claim 1, characterized in that: The guiding component includes a runway-shaped flange (51) arranged on the rack (4) and on one side of the chain (6). A rectangular column (52) is arranged at the inner end of the rotating shaft (8), and one side of the rectangular column (52) abuts against the runway-shaped flange (51).

6. The processing oven for printed circuit boards according to claim 5, wherein: The steering component includes a notch (66) arranged on one side of the runway-shaped flange (51). A rack (67) is arranged at the lower end of the notch (66). A gear (68) is arranged at the lower end of the rectangular column (52). When the rotating shaft (8) is conveyed in the notch (61), the rectangular column (52) is separated from the runway-shaped flange (51), and the gear (68) meshes with the rack (67).

7. A printed circuit board processing oven according to claim 1, characterized in that: The heating device (13) is arranged on the rack (4).

8. A printed circuit board processing oven according to claim 1, characterized in that: A motor (81) is provided on one of the sprockets (5), and the motor (81) is arranged on the frame body (4).

9. A printed circuit board processing oven according to claim 1, characterized in that: Chamfered corners are provided at the outer ends of the card slots (10).

10. A printed circuit board processing oven according to claim 1, characterized in that: Limiting flanges (92) extending outwards are provided at both ends of the card slots (10).

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