CN217491537U

CN217491537U - Tunnel curing oven and circuit board coating assembly line

Info

Publication number: CN217491537U
Application number: CN202221579615.0U
Authority: CN
Inventors: 王常臣; 郑加鑫; 覃桥
Original assignee: Shenzhen Xinnuo Precision Machine Co ltd
Current assignee: Shenzhen Xinnuo Precision Machine Co ltd
Priority date: 2022-06-22
Filing date: 2022-06-22
Publication date: 2022-09-27
Anticipated expiration: 2032-06-22

Abstract

The utility model provides a tunnel curing oven and circuit board coating assembly line. A circuit board coating line comprises a tunnel curing oven. The tunnel curing oven comprises a frame, a transmission mechanism and a curing module; the rack comprises a base and a top cover, and the transmission mechanism is arranged in a curing cavity of the base; one end of the top cover is rotatably connected to the top of the base so as to open or close the curing cavity; when the top cover rotates to a position far away from the base relative to the base, the transmission mechanism and the curing module can be exposed, so that a user can conveniently and timely handle abnormal conditions of the transmission mechanism and the curing module, and the use is convenient. The curing module comprises a curing frame and a plurality of photo-thermal curing lamp tubes, all the photo-thermal curing lamp tubes are arranged on the curing frame side by side, and the curing frame is detachably connected to the top cover. The curing frame of the curing module is detachably connected to the top cover; the curing frame can make the curing module form a whole and carry out the dismouting with the top cap, does benefit to the installation maintenance.

Description

Tunnel curing oven and circuit board coating assembly line

Technical Field

The utility model relates to a circuit board coating field, in particular to tunnel curing oven and circuit board coating assembly line.

Background

Products such as circuit boards need to be sprayed with conformal coating or other coating materials, and the coating materials need to be cured after spraying is finished, so that the coating materials are firmly attached to the circuit boards. The curing operation needs to be carried out in the curing oven, the lamp tube is a fragile part, when the lamp tube needs to be maintained, the curing oven needs to be disassembled to maintain the damaged lamp tube, the maintenance is inconvenient, and the production efficiency is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a tunnel curing oven and circuit board coating assembly line, convenient to use does benefit to the maintenance.

The utility model provides a tunnel curing oven, which comprises a frame, a transmission mechanism and a curing module;

the machine frame comprises a base and a top cover, the top of the base is recessed to form a curing cavity, and one end of the top cover is rotatably connected to the top of the base so as to open or close the curing cavity;

the conveying mechanism is arranged in the curing cavity and is used for conveying a product to be cured;

the curing module is arranged in the top cover and is positioned above the transmission mechanism; the curing module comprises a curing frame and a plurality of photo-thermal curing lamp tubes, all the photo-thermal curing lamp tubes are arranged on the curing frame side by side, and the curing frame is detachably connected to the top cover.

The top cover comprises an outer cover and an inner cover, the outer cover covers the outer side of the inner cover, the outer cover and the inner cover are arranged at intervals and are detachably and fixedly connected through a connecting piece; the inner cover is rotatably connected with the base; the curing frame is detachably connected to the inner side of the inner cover.

The curing frame comprises a curing cover and two lamp tube fixing components, the two ends of the curing cover bend towards the direction of the photo-thermal curing lamp tube, the curing cover is clamped and fixed between the two lamp tube fixing components and surrounds into a lamp cavity with a downward opening, the photo-thermal curing lamp tube is located in the lamp cavity, and the two ends of the photo-thermal curing lamp tube are connected to the two lamp tube fixing components respectively.

The rack further comprises a side cover, the side cover is arranged on the base and arranged side by side with the top cover, an inner cavity of the side cover is communicated to the curing cavity, and an air outlet is formed in the top of the side cover.

The tunnel curing furnace also comprises a heating module, wherein the heating module is arranged on the base and is positioned below the conveying mechanism;

the transmission mechanism comprises two transmission chains, a driving shaft and a transmission motor; the two conveying chains are arranged side by side and in parallel and are used for two ends of a product to be solidified; the two ends of the driving shaft are connected to the two transmission chains through driving chain wheels respectively, a driving chain wheel is further arranged on the driving shaft, and the transmission motor is connected to the driving chain wheel through driving chain transmission so as to drive the driving shaft to rotate and further drive the transmission chains to rotate.

The transmission mechanism further comprises two transmission rails, and the two transmission rails are correspondingly matched with the two transmission chains one by one; one side of each transmission rail is provided with a rail groove, and two ends of each transmission rail are provided with guide wheels;

the transmission chain is arranged in the track groove and is connected with the guide wheel; the conveying chain comprises a plurality of conveying chain links which are connected in sequence, and a rotating shaft between every two adjacent conveying chain links is horizontally arranged and extends out of the track groove to form a bearing part for bearing a product to be solidified.

The transmission mechanism further comprises a width adjusting component, and the width adjusting component is connected between the two transmission rails and used for adjusting the distance between the two transmission chains;

the width adjusting assembly comprises a width adjusting screw rod and a width adjusting sliding block, the width adjusting screw rod is axially and rotatably connected to the base around the width adjusting screw rod, and the width adjusting sliding block is in threaded connection with the width adjusting screw rod;

the two transmission rails are respectively a first transmission rail and a second transmission rail, the first transmission rail is fixedly connected to the base, and the second transmission rail is fixedly connected with the width adjusting sliding block so as to be close to or far away from the first transmission rail under the driving of the width adjusting sliding block.

The curing modules are more than two and are arranged along the transmission direction of the transmission mechanism; the number of the top cover is the same as that of the curing modules, and the top cover and the curing modules are connected in a one-to-one correspondence manner.

The tunnel curing oven further comprises a secondary transmission mechanism and a secondary curing module, wherein the secondary transmission mechanism is positioned below the transmission mechanism, and the transmission directions of the secondary transmission mechanism and the transmission direction of the secondary transmission mechanism are opposite; the secondary curing module is positioned above or below the secondary transmission mechanism.

On the other hand, the utility model also provides a circuit board coating assembly line, including aforementioned tunnel curing oven.

The utility model provides a tunnel curing oven and circuit board coating assembly line, one end of top cap rotates to be connected in the top of base, when the relative base of top cap rotates to the position of keeping away from the base, can expose transmission mechanism and solidification module, and the person of facilitating the use handles the abnormal conditions of transmission mechanism and solidification module in time, convenient to use; the curing frame of the curing module is detachably connected to the top cover; the curing frame can make whole curing module form a whole module to carry out the dismouting with the top cap as a whole, when curing module takes place unusually, can change whole curing module, do benefit to and install the maintenance to curing module.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments are briefly introduced below, and the drawings in the following description are only corresponding drawings of some embodiments of the present invention.

FIG. 1 is a schematic structural view of a tunnel curing oven according to a preferred embodiment of the present invention;

FIG. 2 is a schematic structural view of a top cover and curing module of the tunnel curing oven of FIG. 1;

FIG. 3 is a schematic view of the top cover of FIG. 2 at another angle to the curing module;

FIG. 4 is an exploded view of the top cover and curing module of FIG. 3;

FIG. 5 is an exploded schematic view of the base, transport mechanism and heating module of the tunnel curing oven of FIG. 1;

FIG. 6 is a schematic view of the conveyor mechanism of the tunnel curing oven of FIG. 1;

FIG. 7 is a schematic view of the transport mechanism of FIG. 6 from another angle;

FIG. 8 is a schematic front view of the transport mechanism of FIG. 6;

FIG. 9 is a schematic view of a second transfer rail and a second transfer chain of the transfer mechanism of FIG. 6;

FIG. 10 is a schematic diagram of the width adjustment assembly of the transport mechanism of FIG. 6;

fig. 11 is a schematic view of another angle of the width adjustment assembly of fig. 10.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.

In the present invention, the directional terms, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom", refer to the orientation of the drawings, and the directional terms are used for illustration and understanding, but not for limiting the present invention.

The terms "first," "second," and the like in the terms of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or any order limitation.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1, a tunnel curing oven according to a preferred embodiment of the present invention includes a frame 1, a transmission mechanism 2, and a curing module 3. The frame 1 is used for providing mounting structure and support for whole tunnel curing stove, and transport mechanism 2 is used for carrying and treats the solidification product, and solidification module 3 is used for treating the solidification product and carries out the light and heat solidification.

The housing 1 includes a base 11 and a top cover 12. The top of the base 11 is recessed to form a curing chamber 10, and curing operation can be performed in the curing chamber 10. The conveying mechanism 2 is arranged in the curing chamber 10 and is used for conveying a product to be cured. The product to be cured conveyed in the previous process can be received through the conveying mechanism 2, and the cured product is conveyed to the next process, so that the whole tunnel curing oven can be arranged in a circuit board coating production line, and the production efficiency is improved.

One end of the top cover 12 is rotatably connected to the top of the base 11 to open or close the curing chamber 10. When the top cover 12 rotates to a position far away from the base 11 relative to the base 11, the internal structure of the curing cavity 10 can be exposed, the transmission mechanism 2 and the curing module 3 are exposed, and a user can conveniently and timely handle abnormal conditions of the transmission mechanism 2 and the curing module 3, so that the use is convenient.

As shown in fig. 2, 3 and 4, the curing module 3 is disposed in the top cover 12 and above the conveying mechanism 2; the curing module 3 includes a curing frame 31 and a plurality of light and heat curing lamps 32, all the light and heat curing lamps 32 are mounted on the curing frame 31 side by side, and the curing frame 31 is detachably connected to the top cover 12. The photo-thermal curing lamp 32 can simultaneously perform photo-and-thermal curing on the product to be cured, thereby improving the curing efficiency. The curing frame 31 can make the whole curing module 3 form an integral module so as to be disassembled and assembled with the top cover 12 as a whole, and when the curing module 3 is abnormal, the whole curing module 3 can be replaced, thereby being beneficial to the installation and maintenance of the curing module 3.

Through the clearance of enclosing cover 121 and inner cup 122, can have certain heat preservation effect, can avoid the heat to scatter and disappear, improve the solidification effect. Can dismantle between inner cup 122 and the enclosing cover 121 and be connected, solidification frame 31 can dismantle with inner cup 122 and be connected, can carry out the dismouting with solidification module 3 whole and top cap 12, also can form a whole module with solidification module 3 intercommunication inner cup 122 and carry out the dismouting, further convenient maintenance.

The curing frame 31 includes a curing cover 311 and two lamp fixing assemblies 312, two ends of the curing cover 311 bend towards the light-heat curing lamp 32, the curing cover 311 is clamped and fixed between the two lamp fixing assemblies 312 and encloses a lamp cavity with a downward opening, the light-heat curing lamp 32 is located in the lamp cavity, and two ends of the light-heat curing lamp are respectively connected to the two lamp fixing assemblies 312.

The lamp tube fixing assembly 312 is spaced apart from the inner cover 122, and the lamp tube fixing assembly 312 is detachably connected to the inner cover 122 through a curing connector 314. The curing cover 311 is spaced apart from the inner cover 122 to further prevent heat dissipation.

As shown in fig. 3 and 4, the bottom end of the inner lid 122 is bent inward to form a stopper 1221, and the cured connector 314 is located on the stopper 1221. Utilize locating part 1221 to support solidification connecting piece 314, after taking apart the connection structure between solidification connecting piece 314 and inner cup 122, locating part 1221 supports in the below of solidification connecting piece 314, can avoid droing of whole solidification module 3, guarantees the safety when dismantling, takes apart solidification connecting piece 314 and inner cup 122 after, can take out whole solidification module 3 from one side.

As shown in fig. 4, the lamp tube fixing assembly 312 includes an upper fixing plate 3121, a lower fixing plate 3122 and a side plate 3123. The upper fixing plate 3121 is of an inverted L shape, an inverted U-shaped groove is arranged on a vertical supporting arm, and the lower fixing plate 3122 is of an L shape; a U-shaped groove is arranged on the vertical support arm, and the inverted U-shaped groove and the U-shaped groove are butted to form a positioning hole for accommodating the end part of the photo-thermal curing lamp tube 32. The upper fixing plate 3121 and the lower fixing plate 3122 can facilitate the assembly of the lamp tube fixing assembly 312 and the light curing lamp tube.

The side plate 3123 is fixedly connected with the lower fixing plate 3122, the upper fixing plate 3121, the lower fixing plate 3122 and the side plate 3123 enclose to form an electrical cavity for accommodating an electrical structure, and the end of the light-heat curing lamp tube 32 extends deep into the electrical cavity. The electric structure such as the lead of the curing module 3 can be conveniently accommodated by utilizing the electric cavity, and the electric structure is prevented from being interfered in the installation process.

The side panel 3123 is fixedly coupled to the curing connector 314 such that the curing connector 314 is integrally coupled to the light tube holding assembly 312.

As shown in fig. 1, the rack 1 further includes a side cover 13, the side cover 13 is disposed on the base 11 and is arranged side by side with the top cover 12, an inner cavity of the side cover 13 is communicated to the curing chamber 10, and an air outlet 130 is disposed at a top of the side cover 13. Can connect the air-out system through air outlet 130, slowly send out the air in side cap 13 and the top cap 12 for there is certain air current in the product department of treating of transmission device 2, can improve circulation heat flow, and the intensification is rapid. Through holes may be provided in the outer cover 121 and the inner cover 122 of the top cover 12 to provide air inlets for the external air to enter the curing chamber 10, but it is also possible to provide air inlets through both ends of the transfer mechanism without providing through holes in the top cover 12.

The conveying mechanism 2 extends along the left and right direction of the frame 1, so that the product to be solidified can move along the action direction. The product to be solidified conveyed from the previous process on the left side can be received by the conveying mechanism 2 and conveyed to the processing equipment of the next process on the right side after solidification.

As shown in FIG. 5, the tunnel curing oven further comprises a heating module 4, the heating module 4 is used for providing certain heat for curing, and the curing module 3 is used for photo-thermal curing of the product to be cured. The heating module 4 is disposed on the base 11 and below the transport mechanism 2. The heating module 4 comprises a heating pipe 41 and a heating plate 42, the heating plate 42 is arranged above the heating pipe 41, and heat can be uniformly diffused by the heating plate 42, so that each part of a product to be cured is uniformly heated.

As shown in fig. 6, 7 and 8, the transmission mechanism 2 includes two transmission chains 21, a driving shaft 22 and a transmission motor (not shown). The transmission motor drives the two transmission chains 21 to rotate through the driving shaft 22, and then transmits the product to be solidified.

The two conveyor chains 21 are arranged side by side and in parallel. The two transmission chains 21 can be respectively supported at two ends of a product to be cured, and the middle of the product to be cured is suspended so as to receive the heat of the bottom heating device 4 and improve the curing effect.

Two ends of the driving shaft 22 are connected to the two transmission chains 21 through driving sprockets respectively, a driving sprocket 24 is further disposed on the driving shaft 22, and a transmission motor is connected to the driving sprocket 24 through a driving chain (not shown in the figure) in a transmission manner to drive the driving shaft 22 to rotate, so as to drive the transmission chains 21 to rotate.

The transport mechanism 2 further comprises two transport rails. The two transmission rails are matched with the two transmission chains 21 in a one-to-one correspondence manner. The two transmission tracks are respectively a first transmission track 25a and a second transmission track 25b, and the structures of the two transmission tracks are the same, and the second transmission track 25b is taken as an example to describe the structural features of the transmission tracks.

The second transfer rail 25b is a hollow profile, one side of which is provided with a rail groove 250, and both ends of the first transfer rail 25a are provided with guide wheels 251. The transmission chain 21 is disposed in the rail groove 250 and connected with the guide wheel 251. The operation stability of the transmission chain 21 can be effectively ensured by using the track groove 250 and the guide wheel 251.

As shown in fig. 8 and 9, the conveying chain 21 includes a plurality of conveying chain links 210 connected in sequence, and the rotating shaft between two adjacent conveying chain links 210 is horizontally disposed and extends to the outside of the track groove 250, and forms a bearing portion 211 for bearing the product to be cured. The end of the product to be cured may be supported by the bearing part 211, and the track groove 250 may position the main body of the transmission chain 21 to prevent the lateral turning. A limiting groove structure can be formed between two adjacent bearing parts 211, and a product to be cured can be positioned.

The utility model provides a cooperation structure of transmission chain and transmission rail, structural design is ingenious, does benefit to processing preparation, can do benefit to the transportation of treating the solidification product, and the operation is stable simultaneously.

As shown in fig. 9, a first reinforcing groove 253 is disposed on a side of the second conveying rail 25b away from the conveying chain 21, and a second reinforcing groove 254 is disposed on a bottom surface of the first conveying rail 25a, so that the first reinforcing groove 253 and the second reinforcing groove 254 can improve the structural strength of the second conveying rail 25b, and further ensure the operation stability of the conveying assembly. The first reinforcement groove 253 and the second reinforcement groove 254 can also be used to facilitate the fixed connection of the second transmission rail 25b to the base 11.

As shown in fig. 6, 7, 10 and 11, the transmission mechanism 2 further includes a width adjusting assembly 26, and the width adjusting assembly 26 is connected between the first transmission rail 25a and the second transmission rail 25b and is used for adjusting a distance between the two first transmission rails 25a and the second transmission rail 25b, and further adjusting a distance between the two transmission chains 21; the distance between the two conveyor chains 21 can be adjusted by the width-adjusting assembly 26 in order to adapt to products to be cured of different widths.

The width adjusting assembly 26 includes a width adjusting screw 261 and a width adjusting slider 262. The axial direction of the width-adjusting screw 261 is the arrangement direction of the first transmission rail 25a and the second transmission rail 25b, and the width-adjusting screw 261 is connected to the base 11 in a rotating manner around the self axial direction. The width-adjusting slider 262 is screwed to the width-adjusting screw 261. The first transmission rail 25a is fixedly connected to the base 11, and the second transmission rail 25b is fixedly connected to the width-adjusting slider 262, so as to move close to or away from the first transmission rail 25a under the driving of the width-adjusting slider 262. When the width adjusting screw rod 261 rotates around the self axial direction, the width adjusting screw rod 261 and the width adjusting slider 262 are in threaded fit, so that the width adjusting slider 262 can move along the axial direction of the width adjusting screw rod 261, the width adjusting slider 262 can drive the second transmission rail 25b to move, the second transmission rail 25b is close to or far away from the first transmission rail 25a to move, and the width between the first transmission rail 25a and the second transmission rail 25b can be adjusted.

Further, the base 11 is provided with two fixing blocks 111, and two ends of the width adjusting screw rod 261 are respectively rotatably connected to the two fixing blocks 111, so that the stability of rotation of the width adjusting screw rod 261 is ensured.

The two ends of the driving shaft 22 are also respectively and rotatably connected to the two fixing blocks 111, and the two fixing blocks 111 can be used for realizing the connection between the driving shaft 22 and the width-adjusting screw rod 261 and the base 11, so that the structure is simplified, and the assembly is facilitated.

The width-adjusting slider 262 is provided with a clearance hole (not shown), the driving shaft 22 penetrates through the clearance hole, and the hole wall of the clearance hole is in clearance fit with the driving shaft 22 to avoid contact between the two.

The two drive sprockets on the drive shaft 22 are a first sprocket 23a and a second sprocket 23b, respectively. The first chain wheel 23a is used for driving the transmission chain 21 on the first transmission rail 25a to operate, and the second chain wheel 23b is used for driving the transmission chain 21 on the second transmission rail 25b to operate.

The first chain wheel 23a is located at the first transmission rail 25a, and the first chain wheel 23a is fixedly connected with the driving shaft 22, so that the first chain wheel 23a rotates synchronously with the driving shaft 22. The second chain wheel 23b is located at the second transmission rail 25b, and the second chain wheel 23b is connected to the driving shaft 22 in a sliding manner along the axial direction of the driving shaft 22, so that the second chain wheel 23b and the second transmission rail 25b can move together, and the operation of the transmission chain 21 on the second transmission rail 25b driven by the second chain wheel 23b is facilitated.

The portion of the driving shaft 22 between the two fixed blocks 111 is a polygonal column shape, and a polygonal hole matched with the driving shaft 22 is provided at the center of the second sprocket 23 b. The driving shaft 22 can drive the second chain wheel 23b to rotate by the matching of the polygonal column and the polygonal hole. The cooperation of the driving shaft 22 and the second chain wheel 23b can make the second chain wheel 23b slide on the driving shaft 22, and simultaneously ensure that the two can synchronously rotate around the driving shaft 22.

The two width adjusting assemblies 26 are respectively arranged at two ends of the transmission rail 25, the width adjusting screw rods 261 of the two width adjusting assemblies 26 are connected through a chain transmission assembly 263, and one end of one width adjusting screw rod 261 is connected with a driving piece 27. The driving member 27 can drive one width adjusting screw rod 261 to rotate, and drive the other width adjusting screw rod 261 to rotate through the chain transmission assembly 263, so that the two width adjusting assemblies 26 act simultaneously, and the two ends of the transmission rail 25 move simultaneously, thereby ensuring the balance of movement.

In this embodiment, the driving member 27 is a hand wheel, one end of the width-adjusting screw rod 261 extends out of the base 11, the hand wheel is located outside the base 11, and the width of the transmission rail 25 can be manually adjusted by using the hand wheel. Here, in other embodiments, the driving member 27 may be a motor, and the motor is used for automatic adjustment.

The number of the heating modules 4 is more than two, and the heating modules are arranged along the conveying direction of the conveying mechanism 2. The number of the curing modules 3 is more than two, and the curing modules are arranged along the transmission direction of the transmission mechanism 2; the heating modules 4 are arranged in one-to-one correspondence with the curing modules 3. The number of the top covers 12 is the same as that of the curing modules 3, and the top covers and the curing modules are connected in a one-to-one correspondence manner. By utilizing the matching of the two heating modules 4 and the two curing modules 3, two products to be cured can be cured simultaneously, so that the curing efficiency is improved.

Because the utility model discloses have two curing module 3 in the tunnel curing furnace, in assembly line operation in-process, treat if needs and solidify the product and carry out 2 minutes's solidification operation, can utilize one of them curing module 3 to carry out 1 minute's solidification earlier, carry another curing module 3 to carry out 1 minute's solidification again, utilize two curing module 3 to carry out the solidification operation in proper order to satisfy the curing time demand, can make assembly line operation more smooth and easy.

The tunnel curing oven also comprises a secondary transmission mechanism and a secondary curing module (both not shown in the figure), the secondary transmission mechanism and the secondary curing module are both arranged on the base, the secondary transmission mechanism is positioned below the transmission mechanism, and the transmission directions of the secondary transmission mechanism and the secondary curing module are opposite; the secondary curing module is positioned below the secondary transmission mechanism. The secondary curing module can cure the product to be cured again, and the heating module can cure the product to be cured on the transmission mechanism and the secondary transmission mechanism simultaneously.

Here, in other embodiments, the secondary curing module may be located above the secondary conveying mechanism, and in order to improve the curing effect, the tunnel curing oven may further include a secondary heating module located below the secondary conveying mechanism and disposed opposite to the secondary curing module.

The utility model also provides a circuit board coating assembly line, including aforementioned tunnel curing oven, tunnel curing oven can carry the circuit board of coming to previous process and carry out the light and heat solidification, carries next process again.

More specifically, the circuit board coating assembly line still includes coating machine, detects platform and the platform of plugging into, and coating machine, detection platform, tunnel curing oven and the platform of plugging into set gradually. The coating machine can coat the circuit board, and the test table can detect coating quality, and the tunnel curing oven carries out the curing operation to detecting qualified circuit board, and the platform of plugging into is carried again.

When the tunnel curing oven still includes the secondary curing module, still be provided with the lift behind the platform of plugging into, the lift can carry out the lift operation to the circuit board for the circuit board can be transported to secondary transport mechanism on, carries out further solidification operation.

In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so that the scope of the present invention shall be determined by the scope of the appended claims.

Claims

1. A tunnel curing oven is characterized by comprising a rack, a transmission mechanism and a curing module;

the conveying mechanism is arranged in the curing cavity and used for conveying a product to be cured;

2. The tunnel curing oven of claim 1, wherein the top cap comprises an outer cap and an inner cap, the outer cap covers the inner cap, the outer cap and the inner cap are arranged at intervals and detachably and fixedly connected through a connecting piece; the inner cover is rotatably connected with the base; the curing frame is detachably connected to the inner side of the inner cover.

3. The tunnel curing oven of claim 2, wherein the curing frame comprises a curing cover and two lamp fixing assemblies, two ends of the curing cover are bent toward the light-heat curing lamp, the curing cover is clamped and fixed between the two lamp fixing assemblies and encloses a lamp cavity with an opening facing downward, the light-heat curing lamp is located in the lamp cavity, and two ends of the light-heat curing lamp are respectively connected to the two lamp fixing assemblies.

4. The tunnel curing oven of claim 1 wherein the frame further comprises a side cover, the side cover is disposed on the base and juxtaposed with the top cover, an inner cavity of the side cover is connected to the curing cavity, and an air outlet is disposed at a top of the side cover.

5. The tunnel curing oven of claim 1 further comprising a heating module disposed on the base and below the transport mechanism;

6. The tunnel curing oven of claim 5, wherein the conveyor further comprises two conveyor rails, the two conveyor rails being engaged with the two conveyor chains in a one-to-one correspondence; one side of each transmission rail is provided with a rail groove, and two ends of each transmission rail are provided with guide wheels;

7. The tunnel curing oven of claim 6, wherein the conveyor mechanism further comprises a width adjustment assembly connected between the two conveyor rails for adjusting the distance between the two conveyor chains;

8. The tunnel curing oven of claim 1, wherein the curing modules are two or more and arranged along the conveying direction of the conveying mechanism; the number of the top cover is the same as that of the curing modules, and the top cover and the curing modules are connected in a one-to-one correspondence mode.

9. The tunnel curing oven of claim 1, further comprising a secondary transport mechanism and a secondary curing module, wherein the secondary transport mechanism is located below the transport mechanism and the transport directions of the secondary transport mechanism and the transport mechanism are opposite; the secondary curing module is positioned above or below the secondary transmission mechanism.

10. A circuit board coating line comprising the tunnel curing oven of any one of claims 1 to 9.