Tunnel furnace for circuit board production

Abstract

The utility model discloses a tunnel furnace for circuit board production, which comprises a fixing frame, supporting legs are fixedly mounted at four corners of the bottom of the fixing frame, a conveying belt is mounted on the inner side of the fixing frame, a tunnel furnace body is fixedly mounted at the top of the fixing frame, and a board inlet and a board outlet are respectively formed in two sides of the tunnel furnace body. The front side and the rear side of the inner wall of the tunnel furnace body are each fixedly connected with a movable frame through two telescopic rods, the inner sides of the movable frames are rotationally connected with a plurality of guide rollers at equal intervals, and the sides, close to the inner wall of the tunnel furnace body, of the movable frames are fixedly connected with fixing sleeves. The tunnel furnace for circuit board production is reasonable in structural design and convenient to use, when a circuit board is dried, limiting and guiding can be conducted from the outer side according to the size of the circuit board, shaking or shifting of the circuit board caused by equipment vibration in the conveying process is prevented, the drying efficiency and effect are effectively improved, and the production and use requirements of the circuit board can be comprehensively met.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board production, in particular to a tunnel furnace for circuit board production. Background Art

[0002] At present, the traditional tunnel furnace used for circuit board production cannot be limited according to the size of the circuit board when in use, so that when the circuit board is transported on the conveyor belt, it is easy to cause the circuit board to shake or shift slightly due to the vibration of the equipment, affecting the efficiency and effect of drying, and it is difficult to meet the use requirements. For this reason, we propose a tunnel furnace for circuit board production to solve the problems raised in the above background technology. Utility Model Content

[0003] The purpose of the utility model is to provide a tunnel furnace for circuit board production to solve the problems raised in the above background technology.

[0004] To achieve the above object, the utility model provides the following technical solution: a tunnel furnace for circuit board production, comprising a fixed frame, legs are fixedly installed at the four corners of the bottom of the fixed frame, a conveyor belt is installed on the inner side of the fixed frame, a tunnel furnace body is fixedly installed on the top of the fixed frame, and a board inlet and a board outlet are respectively opened on both sides of the tunnel furnace body;

[0005] The front and rear sides of the inner wall of the tunnel furnace body are fixedly connected to a moving frame through two telescopic rods, the inner side of the moving frame is rotatably connected to a plurality of guide rollers at equal distances, the side of the moving frame close to the inner wall of the tunnel furnace body is fixedly connected to a fixed sleeve, a screw is provided at a position corresponding to the fixed sleeve on the outer side of the tunnel furnace body, one end of the screw penetrates the tunnel furnace body and extends to the inside of the fixed sleeve and is fixedly connected to a rotating block, and the rotating block and the fixed sleeve are movably connected.

[0006] Furthermore, a cross frame is fixedly connected between the left and right sides of the inner wall of the tunnel furnace body, and a number of rotating rods are rotatably connected to the cross frame through anti-slip rotating blocks. The top end of the rotating rod is fixedly connected to a driven bevel gear, and the bottom end of the rotating rod is fixedly connected to a fan blade. An electric heating network is fixedly installed below the inner wall of the tunnel furnace body corresponding to the fan blade, a driving motor is fixedly installed on the right side of the tunnel furnace body, and an active bevel gear matching with the driven bevel gear is fixedly connected to the surface of the output shaft of the driving motor at a position corresponding to the driven bevel gear, and a ventilation net is fixedly installed on the top of the tunnel furnace body.

[0007] Furthermore, a crank is fixedly connected to one end of the screw rod away from the tunnel furnace body, and the screw rod is threadedly connected to the tunnel furnace body.

[0008] Furthermore, rolling elements are movably mounted on the top and bottom of the anti-slipping block, and the rolling elements are specifically balls.

[0009] Furthermore, a rolling bearing is fixedly connected to the position of the output shaft of the driving motor on the inner wall of the tunnel furnace body, and one end of the output shaft of the driving motor passes through the interior of the rolling bearing and is movably connected thereto.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0011] The utility model utilizes a conveyor belt to realize continuous conveying of circuit boards. According to the size of the circuit boards, the screw rod on the outside can be rotated, and the screw block can be driven to rotate and move inwardly through the threaded connection with the tunnel furnace body. Under the connection of the telescopic rod, the fixed sleeve drives the moving frame to translate inward, and multiple guide rollers are used to limit and guide from the side of the circuit board. After the driving motor is turned on, its output shaft drives multiple active bevel gears to rotate, and the driven bevel gear meshed with it can drive the rotating rod to rotate under the connection of the cross frame and the anti-slip rotating block, thereby driving the fan blades to rotate. After the electric heating network is energized, the wind force generated by the rotation of the fan blades is heated by the electric heating network, and the conveyed circuit boards are dried from above. The tunnel furnace for circuit board production has a reasonable structural design and is easy to use. When drying the circuit boards, they can be limited and guided from the outside according to their sizes to prevent the circuit boards from shaking or shifting due to equipment vibration during transportation, effectively improving the efficiency and effect of drying, and can fully meet the production and use needs of circuit boards. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a main structural cross-sectional view of the utility model;

[0013] Figure 2 For this utility model Figure 1 Top view of the structure cross section at AA in the middle.

[0014] In the figure: 1 fixed frame, 2 legs, 3 conveyor belt, 4 tunnel furnace body, 5 telescopic rod, 6 mobile frame, 7 guide roller, 8 fixed sleeve, 9 screw, 10 rotating block, 11 cross frame, 12 anti-slip rotating block, 13 rotating rod, 14 driven bevel gear, 15 fan blade, 16 electric heating network, 17 driving motor, 18 active bevel gear, 19 ventilation network, 20 crank handle, 21 rolling element, 22 rolling bearing. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] See also Figure 1-2A tunnel furnace for circuit board production includes a fixed frame 1, legs 2 are fixedly installed at the four corners of the bottom of the fixed frame 1, a conveyor belt 3 is installed on the inner side of the fixed frame 1, a tunnel furnace body 4 is fixedly installed on the top of the fixed frame 1, and a board inlet and a board outlet are respectively opened on both sides of the tunnel furnace body 4.

[0017] The front and rear sides of the inner wall of the tunnel furnace body 4 are fixedly connected to a moving frame 6 through two telescopic rods 5. The inner side of the moving frame 6 is rotatably connected to a plurality of guide rollers 7 at equal distances. The side of the moving frame 6 close to the inner wall of the tunnel furnace body 4 is fixedly connected to a fixed sleeve 8. A screw 9 is provided at a position corresponding to the fixed sleeve on the outer side of the tunnel furnace body 4. One end of the screw 9 penetrates the tunnel furnace body 4 and extends to the inside of the fixed sleeve 8, where a rotating block 10 is fixedly connected. The rotating block 10 and the fixed sleeve 8 are movably connected.

[0018] Specifically, a cross frame 11 is fixedly connected between the left and right sides of the inner wall of the tunnel furnace body 4, and a number of rotating rods 13 are rotatably connected to the cross frame 11 through an anti-slip rotating block 12. The top of the rotating rod 13 is fixedly connected to a driven bevel gear 14, and the bottom of the rotating rod 13 is fixedly connected to a fan blade 15. An electric heating network 16 is fixedly installed below the inner wall of the tunnel furnace body 4 corresponding to the fan blade, and a driving motor 17 is fixedly installed on the right side of the tunnel furnace body 4. An active bevel gear 18 adapted to the driven bevel gear 14 is fixedly connected to the surface of the output shaft of the driving motor 17, and a ventilation net 19 is fixedly installed on the top of the tunnel furnace body 4.

[0019] Specifically, one end of the screw rod 9 away from the tunnel furnace body 4 is fixedly connected with a crank handle 20, and the screw rod 9 is threadedly connected to the tunnel furnace body 4. The crank handle 20 facilitates the user to rotate the screw rod 9, thereby improving the convenience of use.

[0020] Specifically, rolling elements 21 are movably mounted on the top and bottom of the anti-slipping block 12. The rolling elements 21 are specifically balls. The rolling elements 21 reduce the friction and wear generated when the anti-slipping block 12 rotates.

[0021] Specifically, a rolling bearing 22 is fixedly connected to the position of the output shaft of the drive motor 17 on the inner wall of the tunnel furnace body 4, and one end of the output shaft of the drive motor 17 passes through the inside of the rolling bearing 22 and is movably connected to it. The rolling bearing 22 connects and supports the end of the output shaft of the drive motor 17 to improve its stability during rotation.

[0022] The tunnel furnace for circuit board production has a reasonable structural design and is easy to use. When drying the circuit boards, it can be limited and guided from the outside according to their size to prevent the circuit boards from shaking or shifting due to equipment vibration during transportation, effectively improving the drying efficiency and effect, and can fully meet the production and use needs of circuit boards.

[0023] When in use, the conveyor belt 3 is used to continuously convey the circuit board. According to the size of the circuit board, the outer screw 9 can be rotated, and the rotating block 10 can be driven to rotate and move inward through the threaded connection with the tunnel furnace body 4. Under the connection of the telescopic rod 5, the fixed sleeve 8 drives the movable frame 6 to translate inward, and multiple guide rollers 7 are used to limit and guide from the side of the circuit board. After the drive motor 17 is turned on, its output shaft drives multiple active bevel gears 18 to rotate, and the driven bevel gear 14 meshing with it can drive the rotating rod 13 to rotate under the connection of the cross frame 11 and the anti-slip rotating block 12, thereby driving the fan blade 15 to rotate. After the electric heating network 16 is energized, the wind force generated by the rotation of the fan blade 15 is heated by the electric heating network 16, and the circuit board being conveyed is dried from above.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tunnel furnace for circuit board production, comprising a fixed frame (1), characterized in that: Support legs (2) are fixedly installed at the four corners of the bottom of the fixed frame (1), a conveyor belt (3) is installed on the inner side of the fixed frame (1), a tunnel furnace body (4) is fixedly installed on the top of the fixed frame (1), and a plate inlet and a plate outlet are respectively opened on both sides of the tunnel furnace body (4); The front and rear sides of the inner wall of the tunnel furnace body (4) are fixedly connected to a moving frame (6) via two telescopic rods (5); the inner side of the moving frame (6) is rotatably connected to a plurality of guide rollers (7) at equal distances; the side of the moving frame (6) close to the inner wall of the tunnel furnace body (4) is fixedly connected to a fixing sleeve (8); a screw rod (9) is provided at a position corresponding to the fixing sleeve on the outer side of the tunnel furnace body (4); one end of the screw rod (9) penetrates the tunnel furnace body (4) and extends to the inside of the fixing sleeve (8) to be fixedly connected to a rotating block (10); the rotating block (10) is movably connected to the fixing sleeve (8).

2. A tunnel furnace for circuit board production according to claim 1, characterized in that: A cross frame (11) is fixedly connected between the left and right sides of the inner wall of the tunnel furnace body (4); a plurality of rotating rods (13) are rotatably connected to the cross frame (11) via an anti-slip rotating block (12); a driven bevel gear (14) is fixedly connected to the top of the rotating rod (13); a fan blade (15) is fixedly connected to the bottom of the rotating rod (13); an electric heating network (16) is fixedly installed below the fan blade on the inner wall of the tunnel furnace body (4); a driving motor (17) is fixedly installed on the right side of the tunnel furnace body (4); a driving bevel gear (18) adapted to the driven bevel gear (14) is fixedly connected to the surface of the output shaft of the driving motor (17) at a position corresponding to the driven bevel gear (14); and a ventilation network (19) is fixedly installed on the top of the tunnel furnace body (4).

3. A tunnel furnace for circuit board production according to claim 2, characterized in that: One end of the screw rod (9) away from the tunnel furnace body (4) is fixedly connected to a crank handle (20), and the screw rod (9) is threadedly connected to the tunnel furnace body (4).

4. A tunnel furnace for circuit board production according to claim 3, characterized in that: The top and bottom of the anti-slip rotation block (12) are both movably mounted with rolling elements (21), and the rolling elements (21) are specifically balls.

5. The tunnel furnace for circuit board production according to claim 4, characterized in that: A rolling bearing (22) is fixedly connected to the position of the output shaft of the drive motor (17) on the inner wall of the tunnel furnace body (4), and one end of the output shaft of the drive motor (17) passes through the interior of the rolling bearing (22) and is movably connected thereto.

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