A circuit board coating high pressure heat drying device

Abstract

The present invention relates to the field of circuit board coating, and specifically to a high-pressure thermal drying device for circuit board coating, comprising a combustion cylinder, a spiral guide rail being fixed on the inner wall of the combustion cylinder, a baffle and a symmetrically arranged fixed plate being fixed on the combustion cylinder, and characterized in that the high-pressure thermal drying device for circuit board coating also comprises: an air pumping mechanism, which is arranged on the fixed plate and connected to the combustion cylinder, the air pumping mechanism being used to pump air and acetylene gas into the combustion cylinder, a driving assembly connected to the air pumping mechanism being arranged on the combustion cylinder, the driving assembly driving the air pumping mechanism to transport gas into the combustion cylinder; a pressurizing mechanism, which is arranged in the combustion cylinder and connected to the driving assembly; a support plate, which is arranged on the baffle plate, a clamping mechanism being arranged on the support plate, the clamping mechanism comprising a clamping assembly and a symmetrically arranged clamping plate; a reciprocating assembly, which is arranged on the baffle plate and connected to the support plate.

Description

Technical Field

[0001] The invention relates to the field of circuit board coating, in particular to a circuit board coating high-pressure thermal drying device. Background Art

[0002] The circuit board needs to be cleaned before lamination. The absorption of moisture and residual water are the most common causes of blistering and delamination of circuit boards. Therefore, it is particularly important to remove all standing water from the surface and holes of the printed circuit board.

[0003] The industry mostly uses high-pressure hair dryers to physically remove water from the surface and holes of circuit boards. Circuit boards with different substrates and different thicknesses require different drying times. However, when using a high-pressure hair dryer alone, the oxygen mixed in the air will continue to oxidize the surface of the circuit board under the action of the drying temperature, generating copper oxides that cause poor adhesion. In addition, when using a high-pressure hair dryer manually, it is impossible to ensure that the entire surface of the circuit board is cleaned. Summary of the invention

[0004] The object of the present invention is to provide a circuit board coating high pressure heat drying device to solve the problems raised in the above background technology.

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

[0006] A circuit board coating high-pressure heat drying device comprises a combustion cylinder, a spiral guide rail is fixed on the inner wall of the combustion cylinder, a baffle and a symmetrically arranged fixing plate are fixed on the combustion cylinder, and the circuit board coating high-pressure heat drying device further comprises:

[0007] A gas pumping mechanism is arranged on the fixing plate and connected to the combustion tube, the gas pumping mechanism is used to pump air and acetylene gas into the combustion tube, the combustion tube is provided with a driving assembly connected to the gas pumping mechanism, the driving assembly drives the gas pumping mechanism to deliver gas into the combustion tube;

[0008] A pressurizing mechanism, disposed in the combustion tube and connected to the driving assembly, the pressurizing mechanism can pressurize the gas in the combustion tube and transport it to a desired position;

[0009] A support plate is arranged on the baffle plate, and a clamping mechanism is arranged on the support plate. The clamping mechanism includes a clamping assembly and symmetrically arranged clamping plates, and the clamping assembly can drive the two clamping plates to move toward or away from each other;

[0010] A reciprocating assembly is arranged on the baffle plate and connected to the support plate. The reciprocating assembly drives the clamping mechanism to reciprocate in the horizontal direction through the support plate.

[0011] As a further solution of the present invention: the air pumping mechanism includes a No. 1 piston cylinder fixedly mounted on the fixed plate, a No. 1 piston movably mounted in the No. 1 piston cylinder, a No. 1 movable rod movably connected to the No. 1 piston cylinder is fixed on the No. 1 piston, a support assembly connected to the No. 1 movable rod is arranged on the fixed plate, and the support assembly is connected to the driving assembly.

[0012] As a further solution of the present invention: the support assembly includes a hollow rod fixedly installed on the combustion tube and symmetrically arranged, a support rod is movably installed in the hollow rod, a movable plate fixedly connected to the No. 1 movable rod is fixed on the support rod, a reset structure connected to the support rod and the hollow rod is provided on the combustion tube, and the movable plate is connected to the driving assembly.

[0013] As a further solution of the present invention: the reset structure includes a slot opened on the hollow rod, a fixing ring fixedly installed on the support rod and engaged with the slot, and a spring sleeved on the hollow rod and the support rod and abutting against the fixing ring.

[0014] As a further solution of the present invention: the driving assembly includes a motor fixedly mounted on the combustion tube, a rotating rod rotatably mounted on the combustion tube, a No. 1 belt sleeved on the rotating rod and connected to the output shaft of the motor, a cam is fixed on the rotating rod, the cam abuts against the movable plate, and the rotating rod is connected to the pressurizing mechanism.

[0015] As a further solution of the present invention: the pressurizing mechanism includes a No. 2 piston cylinder fixedly mounted on the combustion tube, a No. 2 piston being movably mounted in the No. 2 piston cylinder, a No. 2 movable rod fixedly connected to the No. 2 piston being movably mounted in the No. 2 piston cylinder, and a driven assembly connected to the No. 2 movable rod and the rotating rod being arranged on the combustion tube.

[0016] As a further solution of the present invention: the driven assembly includes a turntable rotatably mounted on the combustion tube, a second belt sleeved on the rotating rod and connected to the turntable, and a connecting rod hinged on the turntable and hinged to the second movable rod.

[0017] As a further solution of the present invention: the clamping assembly includes a bidirectional screw rod rotatably mounted on the support plate, and a symmetrically arranged threaded sleeve is movably mounted on the bidirectional screw rod, a receiving plate is fixed on the support plate, and a guide structure connected to the threaded sleeve is arranged on the support plate, the guide structure is fixedly connected to the clamping plate, and the threaded sleeve cooperates with the thread of the bidirectional screw rod.

[0018] As a further solution of the present invention: the guide structure includes a guide rod fixedly mounted on the support plate, on which a symmetrically arranged guide sleeve is movably mounted, on which a connecting plate fixedly connected to the threaded sleeve is fixed, and the connecting plate is fixedly connected to the clamping plate.

[0019] As a further solution of the present invention: the reciprocating assembly includes a transmission rod rotatably mounted on the baffle, a guide groove provided on the transmission rod, and a fixed rod fixedly mounted on the baffle, a movable sleeve movably mounted on the fixed rod, a diamond block engaged with the guide groove rotatably mounted on the movable sleeve, the movable sleeve is fixedly connected to the support plate and provided with a limiting groove, and a limiting rod engaged with the limiting groove is fixed on the fixed rod.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: the present application can fix the circuit board by driving the clamping assembly to fix the circuit board, and under the action of the air pump mechanism and the driving assembly, the air and acetylene are transported to the combustion cylinder for combustion treatment to remove oxygen in the air. At the same time, the driving assembly will also drive the pressurizing mechanism to quickly transport the hot gas in the combustion cylinder to the surface of the circuit board to clean and dry the surface of the circuit board. The reciprocating assembly will drive the clamping mechanism to reciprocate through the support plate, thereby ensuring that the circuit board is fully processed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The present invention is a structural schematic diagram of an embodiment of a circuit board laminating high-pressure heat drying device.

[0022] Figure 2 This is a schematic structural diagram from a first angle in an embodiment of a circuit board laminating high-pressure thermal drying device.

[0023] Figure 3 This is a schematic structural diagram from a second angle in an embodiment of a circuit board laminating high-pressure thermal drying device.

[0024] Figure 4 for Figure 3 A schematic diagram of the enlarged structure at point A in the middle.

[0025] Figure 5 The diagram is a half-section structural diagram of an embodiment of a circuit board laminating high-pressure heat drying device.

[0026] Figure 6 This is a schematic diagram of the connection relationship between the pumping mechanism and the driving assembly in one embodiment of a circuit board laminating high-pressure thermal drying device.

[0027] Figure 7 This is a schematic diagram of the connection relationship between the clamping mechanism and the reciprocating assembly in one embodiment of a circuit board laminating high-pressure thermal drying device.

[0028] Figure 8 This is a schematic diagram of a partial explosion structure in one embodiment of a circuit board laminating high-pressure thermal drying device.

[0029] In the figure: 1. combustion tube; 2. spiral guide rail; 3. fixed plate; 4. No. 1 piston cylinder; 5. No. 1 piston; 6. No. 1 movable rod; 7. movable plate; 8. hollow rod; 9. clamping groove; 10. support rod; 11. fixed ring; 12. spring; 13. motor; 14. No. 1 belt; 15. rotating rod; 16. cam; 17. No. 2 belt; 18. turntable; 19. connecting rod; 20. No. 2 movable rod; 21. No. 2 piston; 22. No. 2 piston cylinder; 23. baffle; 24. transmission rod; 25. guide groove; 26. fixed rod; 27. movable sleeve; 28. diamond block; 29. ​​support plate; 30. two-way screw; 31. threaded sleeve; 32. connecting plate; 33. guide rod; 34. guide sleeve; 35. clamping plate; 36. receiving plate. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0032] See also Figures 1 to 8 In an embodiment of the present invention, a circuit board coating high-pressure heat drying device comprises a combustion tube 1, a spiral guide rail 2 is fixed on the inner wall of the combustion tube 1, a baffle 23 and a symmetrically arranged fixing plate 3 are fixed on the combustion tube 1, characterized in that the circuit board coating high-pressure heat drying device further comprises:

[0033] The pumping mechanism is arranged on the fixed plate 3 and connected to the combustion tube 1. The pumping mechanism is used to pump air and acetylene gas into the combustion tube 1. The pumping mechanism includes a No. 1 piston cylinder 4 fixedly installed on the fixed plate 3. A No. 1 piston 5 is movably installed in the No. 1 piston cylinder 4. A No. 1 movable rod 6 movably connected to the No. 1 piston cylinder 4 is fixed on the No. 1 piston 5. A supporting assembly connected to the No. 1 movable rod 6 is arranged on the fixed plate 3. The supporting assembly is connected to the driving assembly, wherein the supporting assembly includes a No. 1 piston cylinder 4 fixedly installed on the fixed plate 3. A hollow rod 8 is symmetrically arranged, and a support rod 10 is movably installed in the hollow rod 8. A movable plate 7 fixedly connected to the No. 1 movable rod 6 is fixed on the support rod 10. A reset structure connected to the support rod 10 and the hollow rod 8 is provided on the combustion tube 1. The movable plate 7 is connected to the driving assembly. The reset structure mentioned above includes a slot 9 opened on the hollow rod 8, a fixing ring 11 fixedly installed on the support rod 10 and engaged with the slot 9, and a spring 12 sleeved on the hollow rod 8 and the support rod 10 and abutting against the fixing ring 11.

[0034] See also Figure 1-3 , Figure 5-6 It should be noted that, in the initial state, the spring 12 is in a compressed state, so that the support rod 10 is controlled to be at the end of the stroke toward the hollow rod 8 through the fixing ring 11. Two one-way valves are arranged on the No. 1 piston cylinder 4. One of the one-way valves on the No. 1 piston cylinder 4 for pumping air is connected to the combustion tube 1 through a conduit, and the other one-way valve is connected to the outside air. One of the one-way valves on the No. 1 piston cylinder 4 for pumping acetylene gas is connected to the combustion tube 1 through a conduit, and the other one-way valve is connected to the conduit for conveying acetylene gas. When it is necessary to pump gas, the driving assembly works at this time, driving the movable plate 7 to move in the direction away from the combustion tube 1, thereby driving the support rod 10 to move in the direction away from the hollow rod 8, so that the fixing ring 11 moves along the length direction of the slot 9, and compresses the spring 12 through the fixing ring 11. The plate 7 will also drive the No. 1 movable rod 6 to move away from the combustion tube 1, and drive the No. 1 piston 5 to move, so that the outside air and acetylene gas enter the No. 1 piston cylinder 4. When the movable plate 7 moves to the end of the stroke, the drive assembly separates from the movable plate 7, the spring 12 is elastically released, and drives the support rod 10 to move toward the hollow rod 8 through the fixing ring 11, so that the gas in the No. 1 piston cylinder 4 is transported to the combustion tube 1, and the above steps are repeated to achieve the effect of continuous gas delivery, wherein the air entry direction and the acetylene entry direction are relatively set to allow the two gases to mix. An igniter is provided in the combustion tube 1 to ignite the gas in the combustion tube 1, and the air enters along the tangent direction of the combustion tube 1, and under the action of the spiral guide rail 2, the air spirals in the combustion tube 1 to ensure that the oxygen in the air is fully burned.

[0035] The combustion tube 1 is provided with a driving assembly connected to the air pumping mechanism, and the driving assembly drives the air pumping mechanism to deliver gas to the combustion tube 1. The driving assembly includes a motor 13 fixedly mounted on the combustion tube 1, a rotating rod 15 rotatably mounted on the combustion tube 1, and a No. 1 belt 14 sleeved on the rotating rod 15 and connected to the output shaft of the motor 13. A cam 16 is fixed on the rotating rod 15, and the cam 16 abuts against the movable plate 7. The rotating rod 15 is connected to the pressurizing mechanism.

[0036] See also Figure 1-3 , Figure 5-6 Furthermore, when the motor 13 is working, it will drive the rotating rod 15 to rotate through the No. 1 belt 14, thereby driving the cam 16 to rotate. Under the action of the spring 12, the movable plate 7 is abutted against the cam 16. When the cam 16 rotates, the movable plate 7 is driven to move in a direction away from the combustion tube 1. When the long axis of the cam 16 is separated from the movable plate 7, under the action of the spring 12, the movable plate 7 moves toward the initial position. Repeat the above steps to achieve the effect of driving the movable plate 7 to reciprocate.

[0037] A pressurizing mechanism is arranged in the combustion tube 1 and connected to the driving assembly. The pressurizing mechanism can pressurize the gas in the combustion tube 1 and transport it to the desired position. The pressurizing mechanism includes a No. 2 piston cylinder 22 fixedly installed on the combustion tube 1, a No. 2 piston 21 is movably installed in the No. 2 piston cylinder 22, and a No. 2 movable rod 20 fixedly connected to the No. 2 piston 21 is movably installed in the No. 2 piston cylinder 22. A driven assembly connected to the No. 2 movable rod 20 and the rotating rod 15 is provided on the combustion tube 1, wherein the driven assembly includes a turntable 18 rotatably installed on the combustion tube 1, a No. 2 belt 17 mounted on the rotating rod 15 and connected to the turntable 18, and a connecting rod 19 hinged on the turntable 18 and hinged to the No. 2 movable rod 20.

[0038] See also Figure 1-3 , Figure 5, further speaking, two one-way valves are arranged on the No. 2 piston cylinder 22, one of which is connected to the combustion tube 1 through a conduit, and the other one-way valve is connected to a conduit facing the circuit board. A resistance heating wire is also arranged in the combustion tube 1 to heat the gas in the combustion tube 1. When the gas in the combustion tube 1 is burned, in order to dry the circuit board, the gas needs to be transported to the circuit board. At this time, the rotating rod 15 rotates, and drives the turntable 18 to rotate through the No. 2 belt 17, thereby driving the connecting rod 19 to move. The connecting rod 19 will drive the No. 2 piston 21 to move in the No. 2 piston cylinder 22 through the No. 2 movable rod 20, and suck the gas in the combustion tube 1 into the No. 2 piston cylinder 22 through the conduit, and then transport it to the circuit board through another one-way valve, and repeat the above steps to pressurize the gas in the combustion tube 1 and transport the gas to the circuit board.

[0039] The support plate 29 is arranged on the baffle plate 23, and a clamping mechanism is arranged on the support plate 29, and the clamping mechanism includes a clamping assembly and a symmetrically arranged card plate 35, and the clamping assembly can drive the two card plates 35 to move closer to or away from each other, and the clamping assembly includes a bidirectional screw rod 30 rotatably mounted on the support plate 29, and a symmetrically arranged threaded sleeve 31 is movably mounted on the bidirectional screw rod 30, and a receiving plate 36 is fixed on the support plate 29, and a guide structure connected with the threaded sleeve 31 is arranged on the support plate 29, and the guide structure is fixedly connected to the card plate 35, and the threaded sleeve 31 is threadedly matched with the bidirectional screw rod 30, wherein the guide structure includes a guide rod 33 fixedly mounted on the support plate 29, and a symmetrically arranged guide sleeve 34 is movably mounted on the guide rod 33, and a connecting plate 32 fixedly connected with the threaded sleeve 31 is fixed on the guide sleeve 34, and the connecting plate 32 is fixedly connected to the card plate 35.

[0040] See also Figure 1-3 , Figure 5 , Figure 7 , further, when it is necessary to dry and clean the circuit board, it is necessary to fix the circuit board and make the required cleaning surface face the No. 2 piston cylinder 22. In the initial state, the two clamping plates 35 are located at the end of the stroke in the direction away from each other, and the circuit board is placed on the receiving plate 36. At this time, the bidirectional screw 30 rotates, driving the two threaded sleeves 31 to move, thereby driving the connecting plate 32 to move, so that the two guide sleeves 34 move along the length direction of the guide rod 33 and move in the direction of approaching each other. The guide sleeve 34 has a guiding function to ensure that the threaded sleeve 31 moves along the length direction of the bidirectional screw 30 and does not rotate with the bidirectional screw 30. The connecting plate 32 will also drive the clamping plate 35 to move in the direction of approaching each other and fix the circuit board placed on the receiving plate 36. At this time, the gas in the combustion tube 1 can be transported to the circuit board through the No. 2 piston 21.

[0041] A reciprocating component is arranged on the baffle 23 and connected to the support plate 29. The reciprocating component drives the clamping mechanism to reciprocate in the horizontal direction through the support plate 29. The reciprocating component includes a transmission rod 24 rotatably mounted on the baffle 23, a guide groove 25 provided on the transmission rod 24, and a fixed rod 26 fixedly mounted on the baffle 23. A movable sleeve 27 is movably mounted on the fixed rod 26. A diamond block 28 engaged with the guide groove 25 is rotatably mounted on the movable sleeve 27. The movable sleeve 27 is fixedly connected to the support plate 29 and has a limiting groove provided thereon. A limiting rod engaged with the limiting groove is fixed on the fixed rod 26.

[0042] See also Figure 1-5 , Figure 7-8 Finally, the guide groove 25 can be divided into four sections, the first section is the first semi-annular groove, the second section is the first spiral groove connected to the first semi-annular groove, the third section is the second semi-annular groove connected to the first spiral groove, and the fourth section is the second spiral groove connected to the first semi-annular groove and the second semi-annular groove. The first spiral groove and the second spiral groove are arranged to cross each other. In the initial state, the diamond block 28 is located in the first semi-annular groove, so that the support plate 29 is located at the end of the stroke on one side of the fixing rod 26. In order to ensure that the circuit board is fully cleaned, the transmission rod 24 rotates at this time and drives the diamond block 28 to move through the guide groove 25, and the diamond block 28 will enter the first spiral groove. The movable sleeve 27 moves along the length direction of the fixed rod 26, and the limit groove and the limit rod are engaged to ensure that the movable sleeve 27 will not deviate during movement. When the diamond block 28 moves to the second semi-annular groove, the movable sleeve 27 moves to the end of the stroke. When the diamond block 28 moves into the second spiral groove, the movable sleeve 27 moves toward the initial position. When the diamond block 28 returns to the first semi-annular groove, the movable sleeve 27 is reset, and the above steps are repeated to drive the circuit board to move along the length direction of the fixed rod 26, wherein the diamond block 28 is arranged in a diamond shape to ensure that the diamond block 28 will not break away and enter another spiral groove when moving in the spiral groove.

[0043] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0044] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description 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 embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A circuit board coating high-pressure heat drying device, comprising a combustion cylinder (1), a spiral guide rail (2) fixed on the inner wall of the combustion cylinder (1), a baffle (23) and a symmetrically arranged fixing plate (3) fixed on the combustion cylinder (1), characterized in that: The circuit board lamination high-pressure thermal drying device also includes: An air pumping mechanism is provided on the fixing plate (3) and connected to the combustion cylinder (1), the air pumping mechanism is used to pump air and acetylene gas into the combustion cylinder (1), and a driving assembly connected to the air pumping mechanism is provided on the combustion cylinder (1), and the driving assembly drives the air pumping mechanism to deliver gas into the combustion cylinder (1); A pressurizing mechanism is arranged in the combustion cylinder (1) and is connected to the driving assembly, and the pressurizing mechanism can pressurize the gas in the combustion cylinder (1) and transport it to a desired position; A support plate (29) is arranged on the baffle (23); a clamping mechanism is provided on the support plate (29); the clamping mechanism includes a clamping assembly and symmetrically arranged clamping plates (35); the clamping assembly can drive the two clamping plates (35) to move toward or away from each other; a reciprocating assembly, arranged on the baffle (23) and connected to the support plate (29), wherein the reciprocating assembly drives the clamping mechanism to reciprocate in the horizontal direction via the support plate (29); The pumping mechanism comprises a No. 1 piston cylinder (4) fixedly mounted on the fixed plate (3), a No. 1 piston (5) movably mounted in the No. 1 piston cylinder (4), a No. 1 movable rod (6) movably connected to the No. 1 piston cylinder (4) fixed on the No. 1 piston (5), a supporting assembly connected to the No. 1 movable rod (6) provided on the fixed plate (3), and the supporting assembly connected to the driving assembly; The driving assembly includes a motor (13) fixedly mounted on the combustion tube (1), a rotating rod (15) rotatably mounted on the combustion tube (1), and a belt (14) sleeved on the rotating rod (15) and connected to the output shaft of the motor (13); a cam (16) is fixed on the rotating rod (15), the cam (16) abuts against the movable plate (7), and the rotating rod (15) is connected to the pressurizing mechanism; The pressurizing mechanism comprises a No. 2 piston cylinder (22) fixedly mounted on the combustion cylinder (1), a No. 2 piston (21) being movably mounted in the No. 2 piston cylinder (22), a No. 2 movable rod (20) fixedly connected to the No. 2 piston (21) being movably mounted in the No. 2 piston cylinder (22), and a driven assembly connected to the No. 2 movable rod (20) and the rotating rod (15) being provided on the combustion cylinder (1); The reciprocating assembly comprises a transmission rod (24) rotatably mounted on the baffle (23), a guide groove (25) provided on the transmission rod (24), and a fixed rod (26) fixedly mounted on the baffle (23); a movable sleeve (27) is movably mounted on the fixed rod (26); a diamond block (28) engaged with the guide groove (25) is rotatably mounted on the movable sleeve (27); the movable sleeve (27) is fixedly connected to the support plate (29) and provided with a limiting groove; and a limiting rod engaged with the limiting groove is fixed on the fixed rod (26).

2. A circuit board coating high-pressure heat drying device according to claim 1, characterized in that: The support assembly comprises a hollow rod (8) fixedly mounted on the combustion tube (1) and symmetrically arranged, a support rod (10) being movably mounted in the hollow rod (8), a movable plate (7) fixedly connected to the first movable rod (6) being fixed on the support rod (10), a reset structure connected to the support rod (10) and the hollow rod (8) being provided on the combustion tube (1), and the movable plate (7) being connected to the drive assembly.

3. The circuit board coating high-pressure heat drying device according to claim 2, characterized in that: The reset structure comprises a slot (9) provided on the hollow rod (8), a fixing ring (11) fixedly mounted on the support rod (10) and engaging with the slot (9), and a spring (12) sleeved on the hollow rod (8) and the support rod (10) and in contact with the fixing ring (11).

4. The circuit board coating high-pressure heat drying device according to claim 1, characterized in that: The driven assembly comprises a turntable (18) rotatably mounted on the combustion cylinder (1), a second belt (17) sleeved on the rotating rod (15) and connected to the turntable (18), and a connecting rod (19) hinged on the turntable (18) and hinged to the second movable rod (20).

5. The circuit board coating high-pressure heat drying device according to claim 1, characterized in that: The clamping assembly includes a bidirectional screw (30) rotatably mounted on the support plate (29), a symmetrically arranged threaded sleeve (31) is movably mounted on the bidirectional screw (30), a receiving plate (36) is fixed on the support plate (29), a guide structure connected to the threaded sleeve (31) is provided on the support plate (29), the guide structure is fixedly connected to the clamping plate (35), and the threaded sleeve (31) is threadedly matched with the bidirectional screw (30).

6. The circuit board coating high-pressure heat drying device according to claim 5, characterized in that: The guide structure includes a guide rod (33) fixedly mounted on the support plate (29), a guide sleeve (34) movably mounted on the guide rod (33) and symmetrically arranged, a connecting plate (32) fixedly connected to the threaded sleeve (31) fixedly mounted on the guide sleeve (34), and the connecting plate (32) is fixedly connected to the clamping plate (35).

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