A cardboard processing and drying device

Abstract

The present invention relates to the technical field of drying devices, and specifically discloses a cardboard processing and drying device, which includes an oven and a conveying device. The conveying device passes through the drying oven. The conveying device includes: two conveying chains arranged side by side; a plurality of support frame groups. The support plate group includes a mounting seat, a left support frame and a right support frame. The mutually approaching ends of the left support frame and the right support frame are both hinged to the mounting seat. Fixedly installed at the rotation axes of the left support frame and the right support frame are first gears that mesh with each other. Fixedly connected to the mounting seat is a fixed gear that can mesh with the conveying chain. When the support frame group switches from the unfolded state to the folded state, the metal foil-bearing sides of two cardboard sheets are made to adhere to each other. When about to move out of the oven, the support frame group switches from the folded state to the unfolded state. After the cardboard moves out of the oven, the support frame group moves to the left end of the conveying device and turns downward, so that the dried cardboard falls off.

Description

Technical Field

[0001] The invention relates to the technical field of drying devices, and in particular to a paperboard processing and drying device. Background Art

[0002] The cardboard drying device mainly relies on the principle of heat exchange to transfer heat to the wet cardboard and evaporate the moisture in it. According to the different heat exchange methods, the drying device can be divided into three types: conduction, convection and radiation. The conduction drying device transfers heat through direct contact between the heating plate or heating rod and the cardboard; the convection drying device uses hot air as a heat transfer medium to transfer heat to the cardboard; the radiation drying device heats the cardboard through infrared and other radiation methods.

[0003] The Chinese patent document with the authorization announcement number CN112254488B discloses a tunnel drying device, including a first box, a first dryer, a second dryer and a second box. The material to be dried is fed into the tunnel drying device from the free end of the first box, and is fed out from the free end of the second box after being dried in the tunnel drying device. Among them, the first dryer conveys hot air from top to bottom, and the first dryer conveys the hot air into the first transmission cavity through the air inlet at the top of the first box, and after passing through the material to be dried, the hot air enters the first return air cavity through the first air guide port and is recovered. The air delivery end of the second dryer is close to the bottom of the second box, and conveys hot air from bottom to top. After the hot air rises and passes through the material to be dried, the hot air enters the second return air cavity through the second air guide port and is recovered. The drying device provided by the patent document occupies less space than a drying room, and has a higher drying efficiency by blowing hot air alternately on both sides of the material to be dried.

[0004] When drying cardboard with metal foil on one side, microwave drying equipment cannot be used due to the limitation of metal foil, so conduction or convection drying equipment is needed. Since these two drying equipments heat the cardboard from the outside to the inside, after heating for a period of time, the temperature difference between the outer metal foil and the inner cardboard is large. Due to the different degrees of thermal expansion, the metal foil will be deformed, resulting in wrinkles on the metal foil after drying. Summary of the invention

[0005] The invention provides a paperboard processing and drying device, aiming to solve the problem in the related art that when drying paperboard with a metal foil on one side, the temperature difference between the outer metal foil and the inner paperboard is large, and the metal foil will be wrinkled.

[0006] A cardboard processing and drying device comprises a drying oven and a conveying device, wherein the conveying device passes through the drying oven, and the conveying device comprises:

[0007] Two conveyor chains, two conveyor chains are arranged side by side;

[0008] A plurality of support frame groups, the support plate group includes a mounting seat, a left support frame and a right support frame, the ends of the left support frame and the right support frame close to each other are hinged on the mounting seat, the rotation axes of the left support frame and the right support frame are fixedly installed with mutually meshing gears, and the mounting seat is fixedly connected with a fixed gear that can mesh with the conveyor chain;

[0009] The driving wheel set and the guide wheel set, the driving wheel set is arranged at the inner side of both ends of the conveying chain, and is used to drive the two conveying chains to move synchronously, and the guide wheel set is arranged at the middle of the upper layer of the conveying chain, and is used to make the middle of the upper layer of the conveying chain concave downward to form a concave part, so as to disengage from the fixed gear;

[0010] Two guide rails are respectively arranged at the front and rear sides of the conveying device and are slidably connected with the mounting seat. The guide rails are in the shape of a runway, and the semicircles formed at the two ends of the runway are concentric with the semicircles formed at the two ends of the conveying chain.

[0011] The flipping device rotates the left support plate and the right support plate upwards and closes them before the support plate group reaches the recessed portion, and unfolds and resets them before moving out of the recessed portion.

[0012] The effect is that after the metal foil of the cardboard enters the oven, the metal foil is heated. In order to prevent the metal foil from being deformed due to excessive temperature rise, the support frame group switches from the expanded state to the closed state, so that the two cardboards are attached to each other with the metal foil sides. When the cardboard is about to move out of the oven, the support frame group switches from the closed state to the expanded state. After the cardboard moves out of the oven, the support frame group moves to the left end of the conveyor and flips downward, so that the dried cardboard falls.

[0013] Preferably, the left support frame includes multiple support rods and a connecting shaft connecting all the support rods. The right support frame has the same structure as the left support frame and is a mirror image of each other. Gear 1 is fixedly mounted on the connecting shaft, and the two rotating shafts rotate synchronously through two meshing gears 1, so that the right support frame and the left support frame rotate upward or downward synchronously.

[0014] Preferably, a plurality of arc-shaped positioning plates are installed at equal intervals on the two connecting shafts in the right support frame and the left support frame. During the rotation process, the ends of the two cardboards that are close to each other abut against the positioning plates. When the left support plate and the right support frame are rotated to a vertical state, the metal foil surfaces of the two cardboards are attached to and aligned.

[0015] Preferably, a torsion spring is installed between the positioning plate and the connecting shaft to make the supporting surfaces of the left support frame and the right support frame coplanar in an initial state.

[0016] Preferably, push blocks are fixedly installed on both left and right ends of the bottom of the positioning plate. When the distance between two adjacent closed support plate groups is the smallest, the push blocks at the bottom of the two support plate groups abut against each other, and multiple closed support plate groups abut against each other through the push blocks, thereby pushing the abutting support plate groups to move.

[0017] Preferably, the mounting seat includes a front end plate and a rear end plate, both of which are rotatably connected to two connecting shafts in the right support frame and the left support frame. Two sliding shafts that are compatible with the guide rails are fixedly provided on one side of the mounting seat close to the guide rail, and the mounting seat is restricted by the two sliding shafts to prevent the mounting seat from rotating on its own.

[0018] Preferably, the flipping device includes a limit plate fixedly arranged inside the oven and a limit rod fixedly connected to the back side of the left support plate, the limit plate is arranged between the two conveyor chains, and the limit rod and the limit plate abut against each other to make the left support frame rotate upward until it is vertical.

[0019] Preferably, the left and right ends of the limiting plate extend beyond the left and right ends of the recess, and the distance between the left end of the limiting plate and the left end of the recess is greater than the length of the right support frame, and the distance between the right end of the limiting plate and the right end of the recess is greater than the length of the left support frame.

[0020] Preferably, a tug wheel is rotatably mounted on the bottom end of the limit rod to reduce the friction between the limit rod and the fiberboard.

[0021] By adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0022] After the metal foil of the cardboard enters the oven, the metal foil is heated and preheated, and then the support frame group switches to the closed state, so that the metal foil surfaces of the two cardboards are in contact, thereby avoiding deformation of the metal foil due to high temperature. The support frame group continues to move to push the other support frame groups on the right to move, and then disconnects from the conveyor chain, and moves in a cycle, thereby making full use of the space in the oven and reducing the distance the cardboard moves during drying. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the present invention.

[0024] Figure 2 This is a schematic diagram of the structure of the present invention without the oven.

[0025] Figure 3 for Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0026] Figure 4 It is a schematic diagram of the structure of the driving wheel set in the present invention.

[0027] Figure 5It is a schematic diagram of the structure of the guide wheel group in the present invention.

[0028] Figure 6 for Figure 5 Schematic diagram of the enlarged structure at point B in the middle.

[0029] Figure 7 for Figure 5 Schematic diagram of the enlarged structure at point C in the middle.

[0030] Figure 8 It is a structural schematic diagram of the support frame assembly in the unfolded state in the present invention.

[0031] Fig. 9 It is a structural schematic diagram of the supporting frame assembly in the present invention in a closed state.

[0032] Fig.10 It is a schematic diagram of the structure when two support frames are combined in a closed state and abut against each other in the present invention.

[0033] Fig.11 It is a schematic diagram of the structure of the turning device in the present invention.

[0034] Reference numerals:

[0035] 1. Conveyor chain; 11. Recessed portion; 2. Driving wheel assembly; 21. Driving wheel; 22. Active wheel; 3. Guide wheel assembly; 4. Support frame assembly; 41. Mounting seat; 411. Positioning plate; 4111. Push block; 4112. Torsion spring; 412. Fixed gear; 413. Front end plate; 414. Rear end plate; 42. Left support frame; 421. Support rod; 422. Connecting shaft; 43. Right support frame; 5. Guide rail; 6. Turning device; 61. Limit plate; 62. Limit rod. DETAILED DESCRIPTION

[0036] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0037] like Figure 1 As shown, a cardboard processing and drying device is used to dry cardboard with metal foil on one side. The drying device includes an oven and a conveyor. Since the cardboard is pasted with metal foil, microwave drying is not possible. The oven is preferably an electric drying oven or a steam drying oven. The cardboard is placed on the conveyor and then sent into the drying oven for drying through the conveyor.

[0038] like Figure 1-3 As shown, the conveying device includes: two conveying chains 1, a driving wheel group 2, a guide wheel group 3, a plurality of support frame groups 4, two guide rails 5, and a turning device 6 (refer to Fig.11), the cardboards and metal foils are placed in groups of two on the support frame group 4 with the metal foil facing upwards, and the guide wheel group 3 drives the conveyor chain 1 to run, so that the support frame group 4 moves the cardboard and metal foil into the oven. When the cardboard and metal foil enter the oven, the metal foil is heated. In order to avoid the metal foil from being deformed due to excessive temperature rise, the support frame group 4 is switched from the unfolded state to the closed state, so that the two cardboards with the metal foil sides are attached to each other. When the cardboards are about to move out of the oven, the support frame group 4 is switched from the closed state to the unfolded state. After the cardboards move out of the oven, the support frame group 4 moves to the left end of the conveyor and flips downward, so that the dried cardboards fall down.

[0039] like Figure 4-Figure 7 As shown, the driving wheel group 2 includes four driving wheels 21 respectively arranged on the inner sides of both ends of the two conveying chains 1. The driving wheel 21 is connected to the driving wheel 22 through a driving belt transmission, and the driving wheel 22 is fixedly connected to the output shaft of the motor.

[0040] The guide wheel group 3 is divided into two groups and is respectively arranged on the front and rear side frames of the conveying device. Each group includes four guide wheels arranged in a trapezoidal shape. The conveying chain 1 passes over the guide wheels, so that the middle part of the upper layer of the conveying chain 1 is concave downward to form a concave part 11, thereby disengaging from the fixed gear 412;

[0041] Two guide rails 5 are respectively arranged at the front and rear sides of the conveying device and are slidably connected to the mounting seat 41. The guide rails 5 are in the shape of a runway, and the semicircles formed at both ends of the runway are concentric with the semicircles formed at both ends of the conveying chain 1.

[0042] like Figure 8-Figure 10 As shown, a plurality of support frame groups 4 are arranged along the conveying direction of the conveying device, and the support plate group includes a mounting seat 41, a left support frame 42 and a right support frame 43 moving along the conveying device; the ends of the left support frame 42 and the right support frame 43 close to each other are both hinged on the mounting seat 41;

[0043] The mounting seat 41 includes a plurality of positioning plates 411, four fixed gears 412, a front end plate 413 and a rear end plate 414. The positioning plate 411 is semicircular. Push blocks 4111 are fixedly installed at both left and right ends of the bottom of the positioning plate 411. When two mounting seats 41 are close to each other, the distance between them is limited by the push blocks 4111. Two sliding shafts adapted to the guide rail 5 are fixedly arranged on one side of the mounting seat 41 close to the guide rail 5. The mounting seat 41 is limited by the two sliding shafts to prevent the mounting seat 41 from rotating. Four fixed gears 412 are fixedly arranged on the front end plate 413 and the rear end plate 414 in groups of two. The fixed gears 412 are disengaged from the conveyor chain 1 in the recessed portion 11 (refer to Figure 7 ), the fixed gear 412 is not in engagement with the conveyor chain 1 when the recessed portion 11 (refer to Figure 6 ), thereby driving the fixed gear 412 to move along the conveying direction of the conveying device through the conveying chain 1;

[0044] The left support frame 42 includes a plurality of support rods 421 and a connecting shaft 422 that is fixedly connected to all the support rods 421. The right support frame 43 has the same structure as the left support frame 42 and is a mirror image of each other. The connecting shafts 422 in the right support frame 43 and the left support frame 42 are rotatably connected to the positioning plate 411, the front end plate 413 and the rear end plate 414. The front and rear ends of the connecting shaft 422 are fixedly connected to a gear 1. Two torsion springs 4112 are installed on the positioning plate 411. The two torsion springs 4112 are respectively connected to the two connecting shafts 422, so that the right support frame 43 and the left support frame 42 remain in an expanded state without being affected by external forces. In the expanded state, the bottoms of the ends of the right support frame 43 and the left support frame 42 that are close to each other are abutted against each other, thereby preventing the right support frame 43 and the left support frame 42 from tilting downward when carrying cardboard, and the gears 1 on the right support frame 43 and the left support frame 42 are meshed with each other, so that the right support frame 43 and the left support frame 42 rotate upward or downward synchronously.

[0045] like Figure 5-Figure 11 As shown, the turning device 6 includes a limit plate 61 fixedly arranged inside the oven and a limit rod 62 fixedly connected to the back side of the left support plate, the limit plate 61 is arranged between the two conveyor chains 1, the left and right ends of the limit plate 61 extend out of the left and right ends of the recessed portion 11, and the distance between the left end of the limit plate 61 and the left end of the recessed portion 11 is greater than the length of the right support frame 43, and the distance between the right end of the limit plate 61 and the right end of the recessed portion 11 is greater than the length of the left support frame 42, and a tugwheel is rotatably installed at the bottom end of the limit rod 62, and the limit rod 62 and the limit plate 61 are abutted against each other to make the left support frame 42 rotate upward until it is vertical.

[0046] Working principle: at the left end of the conveying device, two cardboards are placed with the metal foil side facing up on the left support frame 42 and the right support frame 43 respectively. The conveying chain 1 runs to make the fixed gear 412 move the support frame group 4 into the oven. When the cardboard metal foil enters the oven, the metal foil is heated and preheated. Then the limit rod 62 and the limit plate 61 are abutted, and the left support plate rotates upward. At the same time, the right support frame 43 is synchronously rotated upward through gear 1. During the rotation process, the ends of the two cardboards that are close to each other are abutted against the positioning plate 411. When the left support plate and the right support frame 43 rotate to a vertical state, the metal foil surfaces of the two cardboards are in contact with each other, thereby avoiding deformation of the metal foil caused by high temperature. The support frame group 4 continues to move. When the push block 4111 at the bottom of the support frame group 4 is pressed against the push block 4111 at the bottom of the right support frame group 4 When the cardboard is dried, the fixed gear 412 is disengaged from the conveyor chain 1 and stops moving. This arrangement can make full use of the space in the oven and reduce the distance the cardboard moves during drying. After the cardboard is pushed out of the recessed portion 11 by other cardboard groups 4, the fixed gear 412 is re-engaged with the conveyor chain 1, and the conveyor chain 1 drives the cardboard to move. When the cardboard moves out of the limit plate 61, the limit rod 62 does not contact the limit plate 61, and the torsion spring 4112 releases its elastic potential energy, causing the left support frame 42 and the right support frame 43 to rotate downward and switch to the expanded state. Finally, the cardboard is moved to the left end of the conveyor and flipped downward, thereby causing the dried cardboard to fall.

[0047] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A cardboard processing and drying device, comprising a drying oven and a conveying device, wherein the conveying device passes through the drying oven, and is characterized in that: The transmission device comprises: Two conveyor chains, two conveyor chains are arranged side by side; A plurality of support frame groups, the support plate group includes a mounting seat, a left support frame and a right support frame, the ends of the left support frame and the right support frame close to each other are hinged on the mounting seat, the rotation axes of the left support frame and the right support frame are fixedly installed with mutually meshing gears, and the mounting seat is fixedly connected with a fixed gear that can mesh with the conveyor chain; The driving wheel set and the guide wheel set, the driving wheel set is arranged at the inner side of both ends of the conveying chain, and is used to drive the two conveying chains to move synchronously, and the guide wheel set is arranged at the middle of the upper layer of the conveying chain, and is used to make the middle of the upper layer of the conveying chain concave downward to form a concave part, so as to disengage from the fixed gear; Two guide rails are respectively arranged at the front and rear sides of the conveying device and are slidably connected with the mounting seat. The guide rails are in the shape of a runway, and the semicircles formed at the two ends of the runway are concentric with the semicircles formed at the two ends of the conveying chain. The flipping device rotates the left support plate and the right support plate upwards and closes them before the support plate group reaches the recessed part, and unfolds and resets them before moving out of the recessed part.

2. The cardboard processing and drying device according to claim 1, characterized in that: The left support frame includes a plurality of support rods and a connecting shaft connecting all the support rods. The right support frame has the same structure as the left support frame and is a mirror image of each other. The gear one is fixedly mounted on the connecting shaft.

3. The cardboard processing and drying device according to claim 2, characterized in that: A plurality of arc-shaped positioning plates are installed at equal intervals on two connecting shafts in the right supporting frame and the left supporting frame.

4. The cardboard processing and drying device according to claim 3, characterized in that: A torsion spring is installed between the positioning plate and the connecting shaft, which is used to make the supporting surfaces of the left supporting frame and the right supporting frame coplanar in the initial state.

5. The cardboard processing and drying device according to claim 4, characterized in that: Push blocks are fixedly installed at both left and right ends of the bottom of the positioning plate. When the distance between two adjacent closed support plate groups is the smallest, the push blocks at the bottom of the two support plate groups are against each other.

6. The cardboard processing and drying device according to claim 5, characterized in that: The mounting seat includes a front end plate and a rear end plate, both of which are rotatably connected to two connecting shafts in the right support frame and the left support frame. Two sliding shafts that are compatible with the guide rails are fixedly arranged on one side of the mounting seat close to the guide rail.

7. The cardboard processing and drying device according to any one of claims 4 to 6, characterized in that: The turning device includes a limit plate fixedly arranged inside the oven and a limit rod fixedly connected to the back side of the left support plate. The limit plate is arranged between the two conveyor chains. The limit rod and the limit plate abut against each other to make the left support frame rotate upward until it is vertical.

8. The cardboard processing and drying device according to claim 7, characterized in that: The left and right ends of the limiting plate extend out of the left and right ends of the recessed part, and the distance between the left end of the limiting plate and the left end of the recessed part is greater than the length of the right support frame, and the distance between the right end of the limiting plate and the right end of the recessed part is greater than the length of the left support frame.

9. The cardboard processing and drying device according to claim 7, characterized in that: A tug wheel is rotatably mounted on the bottom end of the limiting rod.

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