PCB cache machine and control method

Abstract

The invention discloses a PCB caching machine and a control method in the technical field of PCB machining, and the PCB caching machine comprises a rack, a moving frame is slidably arranged on the rack, two caching frames are symmetrically arranged on the moving frame, a plurality of adjusting plates are slidably arranged on the caching frames, a conveying belt mechanism is rotatably arranged on the adjusting plates, and the conveying belt mechanism is arranged on the conveying belt mechanism. Two cone pulleys are rotationally arranged on the temporary storage frame, a plurality of connecting belts with the perimeters sequentially increased are arranged on the two cone pulleys in a sleeving mode, fixing rods are arranged on the adjusting plate, the lengths of the multiple fixing rods are sequentially increased from the middle to the two sides, and each connecting belt is provided with two side faces distributed oppositely; wherein the two fixing rods with the same length are connected with the two side faces of the same connecting belt correspondingly, so that the PCBs with different heights and sizes can be cached, meanwhile, adjustment can be conducted according to the sizes of the PCBs, the use flexibility and applicability are improved, operation is convenient, and therefore practicability is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of PCB board processing, and in particular to a PCB board buffer and a control method. Background Art

[0002] PCB, also known as printed circuit board, is an important electronic component, a support for electronic components, and a carrier for electrical connections of electronic components. Generally speaking, PCB boards are mass-produced and need to be tested before assembly. Since the test speed is lower than the production speed, the PCB boards need to be temporarily stored. Existing PCB board cache machines can usually only cache PCB boards of one size when in use, and are difficult to adjust according to the size of the PCB boards, and have poor flexibility and applicability.

[0003] The existing public patent CN114408370A discloses an automatically adjustable PCB board cache machine, including a base plate, a column is arranged on the base plate, a cache component is arranged on the column, the buffer component includes a cache plate, a plurality of cache components are arranged in parallel, and an automatic adjustment component is arranged between adjacent cache components, and under the action of the automatic adjustment component, the spacing between the cache plates of two adjacent cache components can be automatically adjusted, the automatic adjustment component includes an adjustable base plate and an adjustable top plate, an adjusting connecting rod is arranged between the adjusting base plate and the adjusting top plate, the adjusting connecting rod is also hinged with a driving electric cylinder, and the driving electric cylinder can drive the adjusting connecting rod to extend and retract, and during the extension and retraction process, the distance between the adjusting top plate and the adjusting base plate can be adjusted.

[0004] Although the above patent can cache PCB boards of different sizes and can be adjusted according to the size of the PCB boards, it is necessary to set a distance sensor between the adjacent cache boards, and measure the gap between the two adjacent cache boards through the distance sensor and transmit it to the computer. The computer drives the electric cylinder through calculation control to achieve automatic adjustment of the spacing. This method is not only cumbersome to operate, but also difficult to achieve synchronous adjustment of the spacing between the two adjacent cache boards. In order to solve the above problems, the present application proposes a PCB board buffer and a control method. Summary of the invention

[0005] The purpose of the present invention is to solve the technical problems that usually only one size of PCB board can be cached, it is difficult to adjust according to the size of the PCB board, the flexibility and applicability of use are poor, the operation is not only cumbersome, but also it is difficult to achieve synchronous adjustment of the spacing between two adjacent cache boards. The present invention provides a PCB board cache machine and a control method.

[0006] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions: A PCB board cache machine comprises a frame, a mobile frame is slidably arranged on the frame, two cache frames are symmetrically arranged on the mobile frame, a plurality of adjustment plates are slidably arranged on the cache frame, a conveyor belt mechanism is rotatably arranged on the adjustment plate, two tower wheels are rotatably arranged on the cache frame, a plurality of connecting belts with increasing circumferences are sleeved on the two tower wheels, a fixing rod is arranged on the adjustment plate, the lengths of the plurality of fixing rods increase successively from the middle to both sides, the connecting belt has two relatively distributed side surfaces, wherein two fixing rods with the same length are respectively connected to the two side surfaces of the same connecting belt.

[0007] Furthermore, the adjustment plate is rotatably provided with a plurality of rollers which are all in rolling overlap with the side edges of the PCB board.

[0008] Furthermore, a forward and reverse screw rod is rotatably arranged on the movable frame, and the two buffer racks are both slidably arranged on the movable frame and are respectively threadably matched with the forward and reverse thread segments of the forward and reverse screw rods.

[0009] Furthermore, a driving mechanism is provided on the movable frame, and two tower wheels located at the same height are driven by the driving mechanism to rotate synchronously.

[0010] Furthermore, the driving mechanism includes an outer rod rotatably arranged on the movable frame, an inner rod rotatably arranged on the cache frame and slidingly matched with the outer rod, and the inner rod is transmission-connected to the tower wheel via a pulley assembly.

[0011] Furthermore, an air outlet tube is provided on the adjustment plate, a fixed tube is provided on the movable frame, two air ducts are connected to the fixed tube, and the two air ducts are respectively connected to multiple air outlet tubes located on the same side. Cold air parts are provided on the movable frame and the fixed tube, which are used to send air into the fixed tube and convert it into cold air.

[0012] Furthermore, the cross-section of the air outlet tube is L-shaped and the air outlet faces the bottom of the PCB board.

[0013] Furthermore, the cold air component includes a fan arranged on the movable frame and the output end of which is connected to the fixed cylinder. The fixed cylinder is provided with a semiconductor refrigeration plate, the cold end of the semiconductor refrigeration plate extends into the fixed cylinder, and the hot end is located in the outside.

[0014] Furthermore, the air guide duct includes a fixed pipe arranged on the buffer rack, the fixed pipe is provided with a first corrugated pipe connected to the fixed cylinder, the adjustment plate is provided with a second corrugated pipe, and both ends of the second corrugated pipe are respectively connected to the air outlet cylinder and the fixed pipe.

[0015] A control method for a PCB board buffer, including the above-mentioned PCB board buffer, comprises the following steps: S1: Drive the forward and reverse screws to rotate, and the two buffer racks slide synchronously in opposite directions to approach or move away from each other due to the action of the forward and reverse threads, thereby adjusting the distance between the two conveyor belt mechanisms at the same height; S2: Drive the outer rod to rotate, drive the two inner rods to rotate synchronously, and drive the two tower wheels at the same height to rotate synchronously through two pulley assemblies, so as to realize the synchronous rotation of four tower wheels and multiple connecting belts. Due to the difference in circumference, the linear speed of multiple connecting belts at different circumferences changes accordingly, thereby driving multiple fixed rods to move synchronously and equidistantly, and synchronously adjusting the distance between two adjacent conveyor belt mechanisms; S3: The air is sent into the fixed tube through the fan, and the air is converted into cold air through the semiconductor refrigeration plate. The cold air is then split into two streams and enter the two first bellows and the two fixed tubes in sequence respectively. The cold air in the fixed tube is split into multiple streams and enter multiple second bellows respectively. The cold air in the second bellows is blown to the bottom of the PCB board through the air outlet.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the spacing between two adjacent adjustment plates can be adjusted synchronously, thereby adjusting the spacing between two adjacent conveyor belt mechanisms synchronously to achieve caching of PCB boards of different heights and sizes. At the same time, it can be adjusted according to the size of the PCB board, thereby improving the flexibility and applicability of use, and being easy to operate, so it is more practical.

[0017] 2. In the present invention, the width of the PCB board can be adjusted to adapt to PCB boards of different widths, thereby further improving the flexibility and applicability of use.

[0018] 3. In the present invention, the PCB board can be cooled, the cooling efficiency is improved, and the damage risk is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of the structure of the present invention; Figure 2 It is a three-dimensional diagram of the frame structure of the present invention; Figure 3 It is a three-dimensional diagram of the structure of the mobile frame of the present invention; Figure 4 It is a three-dimensional diagram of part of the structure of the present invention; Figure 5 It is a three-dimensional diagram of another part of the structure of the present invention; Figure 6 For the present invention Figure 5 The enlarged view of point A in the middle; Figure 7 For the present invention Figure 5 A three-dimensional cross-sectional view of Figure 8 For the present invention Figure 7 Enlarged view of point B in the middle.

[0020] In the figure: 1. frame; 2. mobile frame; 3. cache frame; 4. adjustment plate; 5. conveyor belt mechanism; 6. tower pulley; 7. connecting belt; 8. fixed rod; 9. roller; 10. positive and negative screw rods; 11. outer rod; 12. inner rod; 13. pulley assembly; 14. air outlet tube; 15. fixed tube; 16. fan; 17. semiconductor refrigeration plate; 18. fixed pipe; 19. first bellows; 20. second bellows. DETAILED DESCRIPTION

[0021] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0022] The present embodiment provides a PCB board buffer and control method, which is mainly used to solve the problem that usually only one size of PCB board can be buffered, it is difficult to adjust according to the size of the PCB board, the flexibility and applicability of use are poor, the operation is not only cumbersome, but also it is difficult to achieve the technical problem of synchronous adjustment of the spacing between two adjacent buffer boards, and provides the following technical solutions, which will be combined with Figure 1-Figure 8 Make a detailed description: A PCB board cache machine comprises a frame 1, a mobile frame 2 is slidably arranged on the frame 1, the mobile frame 2 slides in a vertical direction, a screw rod which is vertically arranged and threadedly penetrates the mobile frame 2 is rotatably arranged on the frame 1, a motor is fixed on the frame 1, the output shaft of the motor is connected with the screw rod, two cache frames 3 are symmetrically arranged on the mobile frame 2, a plurality of adjustment plates 4 are slidably arranged on the cache frame 3, the adjustment plates 4 slide in a vertical direction, a conveyor belt mechanism 5 is rotatably arranged on the adjustment plates 4, the conveyor belt mechanism 5 comprises two conveyor wheels and a conveyor belt, the two conveyor wheels are both rotatably arranged on the adjustment plates 4 in a horizontal direction and are distributed at intervals, the conveyor belt is wound around the two conveyor wheels, a motor is fixed on the adjustment plates 4, the output shaft of the motor is connected to the motor, and the conveyor belt mechanism 5 comprises two conveyor wheels and a conveyor belt, the two conveyor wheels are both rotatably arranged on the adjustment plates 4 in a horizontal direction and are distributed at intervals, the conveyor belt is wound around the two conveyor wheels, the motor is fixed on the adjustment plates 4, and the output shaft of the motor is connected to the motor. A conveying wheel is connected in the middle, and the PCB board is transported horizontally by the conveyor belt mechanism 5 to realize the import and export of the PCB board. Two tower wheels 6 are rotatably arranged on the cache rack 3. The two tower wheels 6 are horizontally oriented and spaced apart from each other. The tower wheels 6 are constructed with a plurality of circumferential surfaces with increasing diameters in sequence. The two tower wheels 6 are sleeved with a plurality of connecting belts 7 with increasing circumferences in sequence. The connecting belt 7 is in a vertical direction. A fixing rod 8 is arranged on the adjustment plate 4. The fixing rod 8 is horizontally oriented and fixed on the adjustment plate 4. The lengths of the plurality of fixing rods 8 increase in sequence from the middle to both sides. The connecting belt 7 has two relatively distributed side surfaces, wherein two fixing rods 8 with the same length are respectively connected to the two side surfaces of the same connecting belt 7. When in use, the motor is driven to work, and the PCB board is transported horizontally through the conveyor belt mechanism 5. The PCB board moves horizontally to the two conveyor belt mechanisms 5 located at the same height. The screw rotates, and the mobile frame 2 moves vertically due to the action of the thread. Then the operation is repeated to cache the PCB board. The two tower wheels 6 located at the same height are driven to rotate synchronously, so as to realize the synchronous rotation of four tower wheels 6 and multiple connecting belts 7. Due to the difference in circumference, the linear speed of multiple connecting belts 7 at different circumferences changes accordingly, thereby driving multiple fixed rods 8 to move synchronously and equidistantly, which can not only realize the synchronous sliding of multiple adjustment plates 4, but also The spacing between two adjacent adjustment plates 4 can be adjusted synchronously, and then the spacing between two adjacent conveyor belt mechanisms 5 can be adjusted synchronously, which can not only cache PCB boards of different widths, but also can be adjusted according to the size of the PCB board, thereby improving the flexibility and applicability of use, and making the operation convenient. In actual use, a monitoring sensing module can be installed on the mobile frame 2, and the position of the PCB board can be monitored and sensed by the monitoring sensing module and transmitted to the computer. The computer controls the driving motor through calculation to drive, so as to adjust the conveying distance of the PCB board through the conveyor belt mechanism 5, so as to realize production or control through automatic control; In summary, when the present application is in use, the spacing between two adjacent adjustment plates 4 can be synchronously adjusted, thereby synchronously adjusting the spacing between two adjacent conveyor belt mechanisms 5, so as to achieve caching of PCB boards of different height sizes, and at the same time can be adjusted according to the size of the PCB board, thereby improving the flexibility and applicability of use, and facilitating operation, and therefore being more practical.

[0023] like Figure 8 As shown, in this embodiment, a plurality of rollers 9 are rotatably arranged on the adjustment plate 4 and are all in rolling contact with the side of the PCB board. The plurality of rollers 9 are all horizontal and distributed in an array along the length direction of the adjustment plate 4. Referring to the above, when the PCB board is transported horizontally by the conveyor belt mechanism 5, the side of the PCB board rolls and overlaps with the roller 9, which not only makes the movement of the PCB board smoother, but also avoids damage caused by friction between the side of the PCB board and the cache rack 3.

[0024] like Figure 3 As shown, in this embodiment, a forward and reverse screw rod 10 is rotatably arranged on the mobile frame 2, and the forward and reverse screw rod 10 is in a horizontal direction. A motor is fixed on the mobile frame 2, and the output shaft of the motor is connected to the forward and reverse screw rod 10. The two cache racks 3 are both slidably arranged on the mobile frame 2 and are respectively threadedly matched with the forward and reverse thread segments of the forward and reverse screw rod 10, and the cache racks 3 slide in the horizontal direction; Referring to the above, when in use, the motor can be driven to work, causing the forward and reverse screws 10 to rotate, and the two cache racks 3 can slide synchronously in opposite directions to approach or move away from each other due to the action of the forward and reverse threads, so as to adjust the spacing between the two conveyor belt mechanisms 5 located at the same height, so that it can be adjusted according to the width size of the PCB board, adapt to PCB boards of different width sizes, and further improve the flexibility and applicability of use.

[0025] like Figure 4 As shown, in this embodiment, a driving mechanism is provided on the mobile frame 2, and the two tower wheels 6 located at the same height are driven to rotate synchronously by the driving mechanism; Referring to the above, when in use, the two tower wheels 6 located at the same height are driven by the driving mechanism to rotate synchronously, which is more convenient to use, and the synchronous rotation of the two tower wheels 6 will not be affected by the synchronous reverse sliding of the two cache racks 3.

[0026] like Figure 4 As shown, in this embodiment, the driving mechanism includes an outer rod 11 rotatably arranged on the mobile frame 2, the outer rod 11 is in a horizontal direction, a motor is fixedly arranged on the mobile frame 2, and the output shaft of the motor is connected to the outer rod 11, and an inner rod 12 slidably matched with the outer rod 11 is rotatably arranged on the cache frame 3, the inner rod 12 is in a horizontal direction and slidably matched with the outer rod 11, and the inner rod 12 is connected to the tower wheel 6 through a pulley assembly 13, and the pulley assembly 13 includes two pulleys and a fixed belt, and the two pulleys are fixedly arranged on the inner rod 12 and the tower wheel 6 respectively; Referring to the above, when in use, the motor is driven to work, driving the outer rod 11 and the two inner rods 12 to rotate synchronously, and the two tower wheels 6 are driven to rotate synchronously through two pulley assemblies 13 respectively. When the two cache racks 3 slide synchronously in opposite directions, the two inner rods 12 both slide in cooperation with the outer rod 11.

[0027] like Figure 5-Figure 8 As shown, in this embodiment, an air outlet cylinder 14 is provided on the adjustment plate 4, and the air outlet cylinder 14 is fixed on the adjustment plate 4. A fixed cylinder 15 is provided on the mobile frame 2, and the fixed cylinder 15 is fixed on the mobile frame 2. Two air guide pipes are connected to the fixed cylinder 15, and the two air guide pipes are respectively connected to multiple air outlet cylinders 14 located on the same side. A cold air component is provided on the mobile frame 2 and the fixed cylinder 15, which is used to send air into the fixed cylinder 15 and convert it into cold air; Before caching, the PCB board is first glued and aged at high temperature. Therefore, when the PCB board is cached by the cache machine, the temperature of the PCB board is high and it is easy to be damaged due to low heat dissipation efficiency. Referring to the above, when in use, the air is sent into the fixed tube 15 through the cold air component and converted into cold air. The cold air is split into two streams and enters two air ducts respectively. Then, the cold air in the air duct is split into multiple streams and enters multiple air outlet tubes 14 respectively. The cold air in the air outlet tube 14 is blown to the bottom of the PCB board, thereby dissipating the heat of the PCB board, improving the heat dissipation efficiency, and reducing the risk of damage.

[0028] like Figure 8 As shown, in this embodiment, the cross-sectional structure of the air outlet tube 14 is L-shaped and the air outlet faces the bottom of the PCB board. This design can increase the contact area between the cold air and the bottom of the PCB board, thereby further improving the heat dissipation efficiency.

[0029] like Figure 6 As shown, in this embodiment, the cold air member includes a fan 16 arranged on the mobile frame 2 and the output end of which is connected to the fixed cylinder 15. The fan 16 is fixed on the mobile frame 2. The fixed cylinder 15 is provided with a semiconductor refrigeration sheet 17. The semiconductor refrigeration sheet 17 has a relatively distributed cold end and a hot end. The cold end of the semiconductor refrigeration sheet 17 extends into the fixed cylinder 15, and the hot end is located outside. Referring to the above, when in use, air is sent into the fixed cylinder 15 through the fan 16, and the air is converted into cold air through the semiconductor refrigeration plate 17, so as to realize the air being sent into the fixed cylinder 15 and converted into cold air. In actual use, a filter can be installed at the input end of the fan 16 to prevent dust and impurities from entering the fan 16 or adhering to the PCB board.

[0030] like Figure 5-Figure 8 As shown, in this embodiment, the air guide pipe includes a fixed pipe 18 arranged on the buffer rack 3, the fixed pipe 18 is fixed on the buffer rack 3, a first corrugated pipe 19 connected to the fixed cylinder 15 is arranged on the fixed pipe 18, a second corrugated pipe 20 is arranged on the adjustment plate 4, the second corrugated pipe 20 is fixed on the adjustment plate 4, and both ends of the second corrugated pipe 20 are respectively connected to the air outlet cylinder 14 and the fixed pipe 18; Referring to the above, when in use, the cold air in the fixed tube 15 enters the first bellows 19 and the fixed tube 18 in turn, and then the cold air in the fixed tube 18 is split into multiple strands and enters multiple second bellows 20 respectively. The cold air in the second bellows 20 is blown to the bottom of the PCB board through the air outlet pipe 14. When the adjustment plate 4 slides, it drives the air outlet pipe 14 to move together, and the second bellows 20 is deformed to ensure the circulation of cold air. When the two cache racks 3 slide synchronously in opposite directions, the first bellows 19 is deformed to ensure the circulation of cold air.

[0031] like Figure 1-Figure 8As shown, in this embodiment, the control method of the PCB board buffer includes the above-mentioned PCB board buffer, including the following steps: S1: driving the forward and reverse screw rods 10 to rotate, and the two buffer racks 3 synchronously slide in opposite directions to approach or move away from each other due to the action of the forward and reverse threads, thereby adjusting the distance between the two conveyor belt mechanisms 5 at the same height; S2: driving the outer rod 11 to rotate, driving the two inner rods 12 to rotate synchronously, and driving the two step pulleys 6 at the same height to rotate synchronously through the two pulley assemblies 13, thereby realizing the synchronous rotation of the four step pulleys 6 and the multiple connecting belts 7. Due to the difference in circumference, the linear speeds of the multiple connecting belts 7 at different circumferences change accordingly, thereby driving the multiple fixed rods 8 to move synchronously and equidistantly, and synchronously adjusting the spacing between the two adjacent conveyor belt mechanisms 5; S3: The air is sent into the fixed tube 15 through the fan 16, and the air is converted into cold air through the semiconductor refrigeration plate 17. The cold air is then split into two streams and enter the two first bellows 19 and the two fixed tubes 18 in sequence respectively. The cold air in the fixed tube 18 is split into multiple streams and enter multiple second bellows 20 respectively. The cold air in the second bellows 20 is blown to the bottom of the PCB board through the air outlet tube 14.

[0032] The working process of the present invention is as follows: the motor is driven to work, and the PCB board is transported in the horizontal direction through the conveyor belt mechanism 5. The PCB board moves in the horizontal direction to the two conveyor belt mechanisms 5 located at the same height. The screw rotates, and the mobile frame 2 moves in the vertical direction due to the action of the screw. Then the operation is repeated to cache the PCB board. The forward and reverse screw rods 10 rotate, and the two cache racks 3 respectively slide in opposite directions to approach or move away from each other due to the action of the forward and reverse threads, and the spacing between the two conveyor belt mechanisms 5 located at the same height is adjusted. The outer rod 11 rotates to drive the two inner rods 12 to rotate synchronously, and the two tower wheels 6 located at the same height are driven by the two pulley assemblies 13 respectively. Synchronous rotation is realized to realize synchronous rotation of four tower wheels 6 and multiple connecting belts 7. Due to the difference in circumference, the linear speed of multiple connecting belts 7 at different circumferences changes accordingly, thereby driving multiple fixed rods 8 to move synchronously and equidistantly, and the distance between two adjacent conveyor belt mechanisms 5 is synchronously adjusted. Air is sent into the fixed cylinder 15 through the fan 16, and the air is converted into cold air through the semiconductor refrigeration plate 17. Thereafter, the cold air is split into two streams and enter the two first corrugated tubes 19 and the two fixed tubes 18 in turn. The cold air in the fixed tube 18 is split into multiple streams and enter the multiple second corrugated tubes 20 respectively. The cold air in the second corrugated tube 20 is blown to the bottom of the PCB board through the air outlet tube 14.

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A PCB board buffer, comprising a frame (1), a mobile frame (2) being slidably arranged on the frame (1), two buffer frames (3) being symmetrically arranged on the mobile frame (2), characterized in that: The buffer rack (3) is slidably provided with a plurality of adjustment plates (4), the adjustment plates (4) are rotatably provided with a conveyor belt mechanism (5), the buffer rack (3) is rotatably provided with two tower wheels (6), the two tower wheels (6) are sleeved with a plurality of connecting belts (7) with successively increasing circumferences, the adjustment plates (4) are provided with a fixing rod (8), the lengths of the plurality of fixing rods (8) are successively increased from the middle to both sides, the connecting belt (7) has two relatively distributed side surfaces, wherein two fixing rods (8) with the same length are respectively connected to the two side surfaces of the same connecting belt (7).

2. A PCB board buffer according to claim 1, characterized in that: The adjustment plate (4) is rotatably provided with a plurality of rollers (9) which are all in rolling overlap with the side edges of the PCB board.

3. A PCB board buffer according to claim 1, characterized in that: A forward and reverse screw rod (10) is rotatably arranged on the moving frame (2), and the two buffer frames (3) are both slidably arranged on the moving frame (2) and are respectively threadably engaged with the forward and reverse thread segments of the forward and reverse screw rod (10).

4. A PCB board buffer according to claim 1, characterized in that: The movable frame (2) is provided with a driving mechanism, and two tower wheels (6) located at the same height are driven by the driving mechanism to rotate synchronously.

5. A PCB board buffer according to claim 4, characterized in that: The driving mechanism comprises an outer rod (11) rotatably arranged on the mobile frame (2), an inner rod (12) rotatably arranged on the cache frame (3) and slidably engaged with the outer rod (11), and the inner rod (12) is connected to the step wheel (6) by a pulley assembly (13).

6. A PCB board buffer according to claim 1, characterized in that: The regulating plate (4) is provided with an air outlet cylinder (14), the movable frame (2) is provided with a fixed cylinder (15), the fixed cylinder (15) is connected to two air guide pipes, the two air guide pipes are respectively connected to a plurality of air outlet cylinders (14) located on the same side, and the movable frame (2) and the fixed cylinder (15) are provided with cold air components for sending air into the fixed cylinder (15) and converting it into cold air.

7. A PCB board buffer according to claim 6, characterized in that: The cross-sectional structure of the air outlet cylinder (14) is L-shaped, and the air outlet faces the bottom of the PCB board.

8. A PCB board buffer according to claim 6, characterized in that: The cold air component comprises a fan (16) arranged on the mobile frame (2) and having an output end connected to the fixed cylinder (15); a semiconductor cooling sheet (17) is arranged on the fixed cylinder (15); a cold end of the semiconductor cooling sheet (17) extends into the fixed cylinder (15) and a hot end is located outside.

9. A PCB board buffer according to claim 6, characterized in that: The air guide pipe comprises a fixed pipe (18) arranged on the buffer rack (3), the fixed pipe (18) being provided with a first corrugated pipe (19) connected to the fixed cylinder (15), the regulating plate (4) being provided with a second corrugated pipe (20), the two ends of the second corrugated pipe (20) being respectively connected to the air outlet cylinder (14) and the fixed pipe (18).

10. A control method for a PCB board buffer, using the PCB board buffer as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1: driving the forward and reverse screw rods (10) to rotate, so that the two buffer racks (3) respectively slide synchronously in opposite directions to approach or move away from each other due to the action of the forward and reverse threads, thereby adjusting the distance between the two conveyor belt mechanisms (5) located at the same height; S2: driving the outer rod (11) to rotate, driving the two inner rods (12) to rotate synchronously, and driving the two tower wheels (6) located at the same height to rotate synchronously through the two pulley assemblies (13), thereby achieving the synchronous rotation of the four tower wheels (6) and the multiple connecting belts (7). Due to the difference in circumference, the linear speed of the multiple connecting belts (7) at different circumferences changes accordingly, thereby driving the multiple fixed rods (8) to move synchronously and equidistantly, and synchronously adjusting the distance between two adjacent conveyor belt mechanisms (5); S3: air is sent into the fixed tube (15) through the fan (16), and the air is converted into cold air through the semiconductor cooling plate (17). The cold air is then split into two streams and enters two first corrugated tubes (19) and two fixed tubes (18) in sequence. The cold air in the fixed tube (18) is split into multiple streams and enters multiple second corrugated tubes (20) respectively. The cold air in the second corrugated tube (20) is blown to the bottom of the PCB board through the air outlet tube (14).

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