A preheating device for corrugated board

Abstract

The utility model discloses a kind of preheating device for corrugated board, belong to corrugated board production and processing equipment technical field;The device includes conveyor belt, the device further includes preheating adjusting mechanism and the limit mechanism of the preheating adjusting mechanism synchronous linkage;The preheating adjusting mechanism includes connecting frame, the upper surface of the connecting frame is fixed with third connecting block, bidirectional screw rod is rotatably connected in the third connecting block, the second connecting block of symmetrical arrangement is threadedly connected on the bidirectional screw rod, the motor of driving its rotation is fixedly connected in one end of the bidirectional screw rod;The upper surface of the connecting frame is fixed with first sliding rail.The utility model passes through synchronous linkage design, solved the preheating adjusting and spacing adjusting in prior art independent, operation is complicated and the problem of low positioning accuracy, with compact structure, convenient operation, can effectively guarantee preheating uniformity, improve the beneficial effect of product quality.

Description

Technical Field

[0001] This utility model relates to the technical field of corrugated cardboard production and processing equipment, and in particular to a preheating device for corrugated cardboard. Background Technology

[0002] Preheating is a crucial step in the production of corrugated cardboard. Heating the corrugated core paper or linerboard effectively regulates the moisture content of the cardboard, softening it and improving its forming properties. This plays a decisive role in subsequent gluing, laminating, and ensuring the flatness of the final product. Therefore, preheating equipment is an indispensable key piece of equipment in a modern corrugated cardboard production line.

[0003] Currently, most common preheating devices on the market use preheating rollers to heat the corrugated cardboard in contact during transport. Since corrugated cardboard comes in different thicknesses such as three-layer, five-layer, and seven-layer, these preheating devices are usually equipped with adjustment mechanisms to adjust the distance between the preheating rollers, thus accommodating cardboard of different thicknesses.

[0004] However, to ensure that corrugated cardboard is heated evenly during the preheating process, simply adjusting the spacing of the preheating rollers is insufficient. Guide and limiting mechanisms are also needed on both sides of the conveying path to prevent the cardboard from shifting or swaying during rapid transport. In existing technologies, the adjustment mechanisms for the preheating roller spacing and the guide and limiting mechanisms are usually independent, requiring operators to perform two separate manual adjustments.

[0005] This separate adjustment method has obvious drawbacks: First, the operation process is cumbersome, requiring repeated positioning and locking, which reduces production efficiency when switching specifications; second, and more importantly, because the adjustment is separate, it is difficult to ensure that the center line of the guide limit mechanism is precisely aligned with the center line of the preheating roller. Once an alignment error occurs, the corrugated cardboard will deviate from the ideal heating center line, resulting in one side being overheated while the other side is underheated, seriously affecting the uniformity of preheating and the stability of quality.

[0006] Therefore, this utility model proposes a preheating device for corrugated cardboard to overcome the shortcomings of the prior art. Utility Model Content

[0007] To overcome the above shortcomings, this utility model provides a preheating device for corrugated cardboard, aiming to improve the problem that the preheating roller spacing adjustment and cardboard limit adjustment are independent of each other in the preheating device for corrugated cardboard, resulting in cumbersome operation and difficulty in ensuring centering accuracy. This utility model aims to provide a preheating device for corrugated cardboard with an improved structure that can effectively solve the above problems.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a preheating device for corrugated cardboard, comprising a conveyor belt, the device further comprising a preheating adjustment mechanism and a limiting mechanism that is synchronously linked with the preheating adjustment mechanism; The preheating adjustment mechanism includes a connecting frame, a third connecting block fixed on the upper surface of the connecting frame, a bidirectional lead screw rotatably connected inside the third connecting block, and symmetrically arranged second connecting blocks threaded onto the bidirectional lead screw. A motor driving the rotation of the bidirectional lead screw is fixedly connected to one end of the bidirectional lead screw. A first slide rail is fixed on the upper surface of the connecting frame, a first connecting block is slidably connected on the first slide rail, and one side of the first connecting block is fixedly connected to the second connecting block. A first sleeve is fixed on the other side of the first connecting block, and a preheating roller is sleeved on the outer wall of the first sleeve. A connecting plate is provided above the conveyor belt. The connecting plate is fixed above the base and is positioned close to the conveyor belt in the conveying direction. A limiting mechanism is provided on the outside of the connecting plate. The limiting mechanism includes a second slide rail. The second slide rail is fixed on the outside of the connecting plate, and a sliding block is slidably connected to one side of the second slide rail.

[0009] Preferably, a limiting wheel is installed on the outer side of the sliding block and a fixing frame is fixedly connected thereto. A second connecting block is fixedly connected to the other side of the fixing frame. A second sliding rod is fixedly connected to the side of the sliding block. A first fixing block is fixed on the connecting plate. The second sliding rod slides through the first fixing block.

[0010] Preferably, a second sleeve is fitted onto the lower end of the preheating roller, and a first sliding rod is fixed to the outside of the second sleeve, the first sliding rod being slidably connected to the connecting frame.

[0011] Preferably, a second fixing block is fixed to one side of the connecting frame, and the motor is installed inside the second fixing block.

[0012] Preferably, the sliding block is also equipped with a pulley system.

[0013] Preferably, the device further includes a base, and the conveyor belt is installed inside the base.

[0014] Preferably, upright plates are vertically fixed to both sides of the base, and heating tubes are fixed to the inner side of the upright plates.

[0015] Preferably, a reflector is fixed above the upright plate, and the reflector is fixedly connected to the inlet and outlet sides of the upright plate through the connecting plate.

[0016] This utility model has the following beneficial effects: 1. In this utility model, by setting a bidirectional lead screw driven by a motor and using a fixed frame to rigidly connect the second connecting block for adjusting the preheating roller with the sliding block for adjusting the limit wheel, a synchronous linkage mechanism is formed. This solves the problem in the prior art that the preheating distance and the limit distance need to be adjusted independently, which is cumbersome and inefficient. It achieves the technical effect of completing the adjustment of the two places simultaneously in one operation, greatly simplifying the operation process of the equipment and improving the efficiency of production preparation.

[0017] 2. In this utility model, by mechanically connecting the preheating adjustment mechanism and the limiting mechanism, it is ensured that the adjustment displacement and movement direction of the two are always strictly consistent. This solves the problem that the center lines of the preheating roller and the limiting wheel may not coincide and the positioning may be inaccurate due to separate adjustment. This achieves the technical effect of ensuring that the corrugated cardboard is always accurately positioned in the center of the heating area, ensuring the uniformity of preheating, and improving the product quality. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a preheating device for corrugated cardboard proposed in this utility model; Figure 2 This is a schematic diagram of the connecting frame part of a preheating device for corrugated cardboard proposed in this utility model; Figure 3 This is a schematic diagram of the fixing frame part of a preheating device for corrugated cardboard proposed in this utility model; Figure 4 This is a schematic diagram of the preheating roller section of a preheating device for corrugated cardboard proposed in this utility model.

[0019] Legend: 1. Base; 2. Conveyor belt; 3. Preheating adjustment mechanism; 301. Connecting frame; 302. Preheating roller; 303. First sleeve; 304. First slide rod; 305. Second sleeve; 306. First connecting block; 307. Second connecting block; 308. First slide rail; 309. Bidirectional lead screw; 310. Third connecting block; 311. Motor; 4. Fixing frame; 5. Limiting mechanism; 501. Sliding block; 502. Second slide rail; 503. Pulley block; 504. Limiting wheel; 505. Second slide rod; 6. Connecting plate; 7. Reflector; 8. Vertical plate; 9. Heating tube; 10. First fixing block; 11. Second fixing block. Detailed Implementation

[0020] Please refer to Figures 1 to 4 This utility model provides a preheating device for corrugated cardboard, which aims to solve the problems in the prior art where the preheating component and the guide limiting component need to be adjusted independently, the operation is cumbersome, and it is difficult to ensure synchronization accuracy.

[0021] The preheating device for corrugated cardboard includes a base 1, a conveyor belt 2 installed inside the base 1, vertical plates 8 fixedly connected to both sides of the base 1, heating tubes 9 fixed inside the vertical plates 8, and a reflector 7 fixed above the vertical plates 8. The preheating adjustment mechanism 3 includes a connecting frame 301. Symmetrical third connecting blocks 310 are fixed to the upper surface of the connecting frame 301. A bidirectional lead screw 309 rotates inside the third connecting block 310. Symmetrically arranged second connecting blocks 307 are threaded onto the bidirectional lead screw 309. A motor 311 that drives the bidirectional lead screw 309 to rotate is fixedly connected to one end of the bidirectional lead screw 309. To ensure smooth and precise transmission, a first slide rail 308 is also fixed to the upper surface of the connecting frame 301. The first slide rail 308... A first connecting block 306 is slidably connected, and one side of the first connecting block 306 is fixedly connected to one side of the second connecting block 307; a first sleeve 303 is fixed to the other side of the first connecting block 306, and a preheating roller 302 is sleeved on the outer wall of the first sleeve 303; in order to further enhance the stability of the preheating roller 302 during the adjustment process, a second sleeve 305 is also sleeved on the lower end of the preheating roller 302, and a first sliding rod 304 is fixed on the outer side of the second sleeve 305, and the first sliding rod 304 is slidably connected to the connecting frame 301; The connecting plate 6 is fixed above the base 1 and positioned in the conveying direction close to the conveyor belt 2. A limiting mechanism 5 is provided on the outer side of the connecting plate 6. The limiting mechanism 5 includes a second slide rail 502 fixed on the outer side of the connecting plate 6. A sliding block 501 is slidably connected to one side of the second slide rail 502, and a limiting wheel 504 is installed on the outer side of the sliding block 501. In order to achieve synchronous linkage with the preheating adjustment mechanism 3, a fixing frame 4 is also fixedly connected to the outer side of the sliding block 501. A second connecting block 307 is fixedly connected to the other side of the fixing frame 4. Through the rigid connection of the fixing frame 4, the second connecting block 307 driven by the bidirectional screw 309 can synchronously drive the sliding block 501 to slide along the second slide rail 502 when it moves, thereby realizing the synchronous adjustment of the distance between the preheating roller 302 and the limiting wheel 504.

[0022] To ensure that the sliding block 501 does not wobble or deflect when sliding on the second slide rail 502, a second slide rod 505 is fixedly connected to the side of the sliding block 501. Correspondingly, a first fixing block 10 is fixed on the connecting plate 6. The second slide rod 505 slides through the first fixing block 10. This dual guide structure, which is composed of the second slide rail 502 and the second slide rod 505, provides constraints on the sliding block 501 in two directions, greatly enhancing the stability of the movement of the sliding block 501, thereby ensuring that the limiting wheel 504 can always clamp and limit the corrugated cardboard in a stable posture. To ensure that the preheating roller 302 does not tilt or vibrate when it is moved by the first sleeve 303, a second sleeve 305 is also sleeved at the lower end of the preheating roller 302, and a first sliding rod 304 is fixed on the outside of the second sleeve 305. The first sliding rod 304 is slidably connected to a pre-set groove in the connecting frame 301. Through the joint support of the first sleeve 303 and the second sleeve 305 for both ends of the preheating roller 302, and the auxiliary guidance provided by the first sliding rod 304, it is ensured that the preheating roller 302 remains straight throughout the entire adjustment stroke, providing structural guarantee for uniform preheating. The motor 311 that drives the entire linkage mechanism is installed in such a way that a second fixing block 11 is fixed on one side of the connecting frame 301, and the motor 311 is installed inside the second fixing block 11. This arrangement provides a stable mounting base for the motor 311, ensuring that the power can be stably output to the bidirectional lead screw 309.

[0023] In a preferred embodiment, in order to further enhance the motion stability of the limiting mechanism 5, a second sliding rod 505 is fixedly connected to the side of the sliding block 501, and a first fixing block 10 is fixed on the connecting plate 6. The second sliding rod 505 slides through the first fixing block 10.

[0024] In a preferred embodiment, in order to further enhance the motion stability of the preheating adjustment mechanism 3, a second sleeve 305 is also sleeved on the lower end of the preheating roller 302, and a first slide rod 304 is fixed on the outer side of the second sleeve 305. The first slide rod 304 is slidably connected to the connecting frame 301.

[0025] In a preferred embodiment, in order to provide a stable power source mounting structure, a second fixing block 11 is fixed to one side of the connecting frame 301, and the motor 311 is installed inside the second fixing block 11.

[0026] In a preferred embodiment, a pulley block 503 is also installed on the sliding block 501 to provide auxiliary positioning of the corrugated cardboard.

[0027] In a preferred embodiment, in order to construct the overall support platform of the device, the device also includes a base 1, and the conveyor belt 2 is installed inside the base 1.

[0028] In a preferred embodiment, in order to construct the heating frame of the device, upright plates 8 are vertically fixed to both sides of the base 1, and heating tubes 9 are fixed to the inner side of the upright plates 8.

[0029] In a preferred embodiment, in order to concentrate heat and improve heating efficiency, a reflector 7 is fixed above the vertical plate 8, and the reflector 7 is fixedly connected to the inlet and outlet sides of the vertical plate 8 through a connecting plate 6.

[0030] Working principle: During preheating, the motor 311 installed inside the second fixed block 11 is started according to the thickness of the corrugated cardboard to be processed. The motor 311 drives the bidirectional lead screw 309 to rotate in the third connecting block 310. The rotating bidirectional lead screw 309 drives the symmetrically arranged second connecting blocks 307 to slide towards or away from each other along the axial direction of the bidirectional lead screw 309 through threaded engagement. The movement of the second connecting block 307 is precisely transmitted to two mechanisms. On the one hand, the second connecting block 307 drives the first connecting block 306 to slide smoothly along the first slide rail 308 through a fixed connection. The sliding of the first connecting block 306 drives the first sleeve 303 and the preheating roller 302 sleeved on the outer wall of the first sleeve 303 to move synchronously. The stability of this translation process is ensured by the second sleeve 305 and the first slide rod 304 at the other end. During the sliding of the second connecting block 307, on the other hand, the rigidly connected fixed frame 4 synchronously drives the sliding block 501 to slide along the second slide rail 502 fixed on the connecting plate 6. The stability of this sliding process is ensured by the sliding of the second slide rod 505 within the first fixed block 10. The sliding of the sliding block 501 drives the limiting wheel 504 installed on the outside of the sliding block 501 to move synchronously. Since the translational movement of the preheating roller 302 and the translational movement of the limiting wheel 504 both originate from the same movement of the second connecting block 307, the precise synchronous linkage of the spacing adjustment between the preheating adjustment mechanism 3 and the limiting mechanism 5 is realized to adapt to corrugated cardboard of different thicknesses and to reliably limit its lateral movement. After adjustment, the corrugated cardboard is placed on the conveyor belt 2 inside the base 1. The conveyor belt 2 drives the corrugated cardboard forward. After passing through the limiting area formed by the limiting wheel 504 and the pulley group 503, the corrugated cardboard enters the heating area formed by the heating pipes 9 on both sides of the upright plate 8 and the upper reflector 7 for uniform preheating.

Claims

1. A preheating device for corrugated cardboard, comprising a conveyor belt (2), characterized in that, The device also includes a preheating adjustment mechanism (3) and a limiting mechanism (5) that is synchronously linked with the preheating adjustment mechanism (3). The preheating adjustment mechanism (3) includes a connecting frame (301), a third connecting block (310) is fixed on the upper surface of the connecting frame (301), a bidirectional lead screw (309) is rotatably connected inside the third connecting block (310), a symmetrically arranged second connecting block (307) is threaded on the bidirectional lead screw (309), and a motor (311) for driving the bidirectional lead screw (309) is fixedly connected to one end of the bidirectional lead screw (309); a first slide rail (308) is fixed on the upper surface of the connecting frame (301), a first connecting block (306) is slidably connected on the first slide rail (308), and one side of the first connecting block (306) is fixedly connected to the second connecting block (307); a first sleeve (303) is fixed on the other side of the first connecting block (306), and a preheating roller (302) is sleeved on the outer wall of the first sleeve (303); A connecting plate (6) is provided above the conveyor belt (2). The connecting plate (6) is fixed above the base (1) and is located in the conveying direction close to the conveyor belt (2). A limiting mechanism (5) is provided on the outside of the connecting plate (6). The limiting mechanism (5) includes a second slide rail (502). The second slide rail (502) is fixed on the outside of the connecting plate (6). A sliding block (501) is slidably connected to one side of the second slide rail (502).

2. The preheating device for corrugated cardboard according to claim 1, characterized in that, The sliding block (501) is equipped with a limiting wheel (504) and a fixed frame (4) is fixedly connected to it. The second connecting block (307) is fixedly connected to the other side of the fixed frame (4). The second sliding rod (505) is fixedly connected to the side of the sliding block (501). The first fixed block (10) is fixed on the connecting plate (6). The second sliding rod (505) slides through the first fixed block (10).

3. The preheating device for corrugated cardboard according to claim 1, characterized in that, The lower end of the preheating roller (302) is fitted with a second sleeve (305), and a first slide rod (304) is fixed on the outside of the second sleeve (305). The first slide rod (304) is slidably connected to the connecting frame (301).

4. A preheating device for corrugated cardboard according to claim 1, characterized in that, A second fixing block (11) is fixed on one side of the connecting frame (301), and the motor (311) is installed inside the second fixing block (11).

5. A preheating device for corrugated cardboard according to claim 1, characterized in that, The sliding block (501) is also equipped with a pulley assembly (503).

6. A preheating device for corrugated cardboard according to claim 1, characterized in that, The device also includes a base (1), and the conveyor belt (2) is installed inside the base (1).

7. A preheating device for corrugated cardboard according to claim 6, characterized in that, The base (1) has vertical plates (8) fixedly connected to both sides, and heating tubes (9) are fixed to the inner side of the plates (8).

8. A preheating device for corrugated cardboard according to claim 7, characterized in that, A reflector (7) is fixed above the upright plate (8), and the reflector (7) and the inlet and outlet sides of the upright plate (8) are fixedly connected by the connecting plate (6).

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