Corrugated board preheating device for preventing breakage of press fluting

Abstract

This utility model discloses a preheating device for corrugated cardboard to prevent cracking due to corrugation. Its structure includes a ventilation grid, a preheating box, a connecting port, a maintenance plate, and a preheating assembly. The ventilation grid and preheating box are integrated, and the connecting port connects the preheating box to the preheating assembly. The maintenance plate is located above the preheating box. The preheating assembly includes an adjustment frame, a dust extraction assembly, an exhaust grid, a correction plate, a scraper, and preheating rollers. The adjustment frame is installed on both sides of the preheating rollers. The exhaust grid and dust extraction assembly are integrated, and the correction plate is connected to the adjustment frame. The scraper rests against the surface of the preheating rollers. There are five preheating rollers evenly distributed horizontally. When preheating corrugated cardboard, this device can simultaneously clean up electrostatically adsorbed paper lint, preventing its accumulation on the surface of the heat-conducting layer. This avoids uneven contact between the heat-conducting layer and the corrugated cardboard due to paper lint residue, ensures uniform temperature conduction, and eliminates the impact of localized temperature differences on preheating quality.

Description

Technical Field

[0001] This utility model belongs to the field of cardboard preheating, and more specifically, it relates to a preheating device for corrugated cardboard to prevent corrugation cracking. Background Technology

[0002] To prevent corrugated paper from cracking due to brittleness during production or processing, the preheating equipment uses a precise temperature control system to heat the paperboard evenly, softening the fibers to improve its flexibility and extensibility.

[0003] During the preheating process of corrugated cardboard, due to electrostatic adsorption, paper lint that falls off the cardboard surface tends to adhere to the preheating roller, causing local accumulation. These lints carbonize at high temperatures, which not only causes the surface of the preheating roller to turn black, but may also affect the uniformity of heat conduction, leading to uneven heating of the corrugated cardboard, local overheating, or moisture imbalance, ultimately affecting the quality of preheating and the performance of the finished cardboard. Utility Model Content

[0004] To solve the aforementioned technical problems, the purpose and effectiveness of this utility model's preheating device for preventing corrugated cardboard breakage are achieved through the following specific technical means: Its structure includes a vent, a preheating box, a connection port, an inspection plate, and a preheating assembly. The vent and the preheating box are an integrated structure. The connection port passes through the preheating box and connects to the preheating assembly. The inspection plate is located above the preheating box. The preheating unit includes an adjustment frame, a dust collection unit, an exhaust grille, a calibration plate, a scraper, and a preheating roller. The adjustment frame is installed on the left and right sides of the preheating roller. The exhaust grille and the dust collection unit are integrated. The calibration plate is connected to the adjustment frame. The scraper rests against the surface of the preheating roller. There are five preheating rollers in total, which are evenly distributed in a horizontal direction.

[0005] As a further improvement of this utility model, the scraper includes a connecting frame, a PTFE scraper, a bracket, a collecting trough, and a partition plate. The PTFE scraper is connected to the bracket, the bracket and the collecting trough are an integrated structure, the partition plate is fixed to the surface of the collecting trough, the connecting frame is fixed on the left and right sides of the collecting trough, and the partition plate divides the collecting trough equally in a horizontal direction.

[0006] As a further improvement of this utility model, the preheating roller includes a connecting belt, a temperature-conducting layer, a connecting wheel, a rubber layer, an inlet, and a spiral channel. The connecting belt connects the rubber layer and the connecting wheel. The inlet is connected to the temperature-conducting layer. The spiral channel and the temperature-conducting layer are an integrated structure. The spiral channel can guide the incoming steam to spiral, making the temperature conducted by the temperature-conducting layer more uniform.

[0007] As a further improvement of this utility model, the PTFE scraper presses against the surface of the preheating roller to scrape and collect the paper lint attached to its surface. The separator divides the collected paper lint into sections to facilitate the dust collection unit's adsorption treatment. The PTFE scraper supported by the bracket matches the curvature of the temperature-conducting layer.

[0008] As a further improvement of this utility model, the correction plate has a symmetrical structure with an entrance that gradually narrows to assist in the calibration of corrugated paper entering the equipment. The adjustment frame is adjusted according to the thickness of the corrugated paper being processed. The connecting wheel is connected to a motor and drives the rubber layer to rotate via a connecting belt.

[0009] As a further improvement of this utility model, the preheating unit has a symmetrical structure, which preheats both the upper and lower surfaces of the corrugated paper at the same time, and the connection port allows steam to enter the inlet.

[0010] Compared with the prior art, the present invention has the following beneficial effects: Firstly, when preheating corrugated paper, the equipment can simultaneously clean up the paper lint adsorbed by electrostatics, preventing it from accumulating on the surface of the heat-conducting layer. This avoids uneven contact between the heat-conducting layer and the corrugated paper due to paper lint residue, and ensures uniform temperature conduction, eliminating the impact of local temperature differences on preheating quality.

[0011] Secondly, the adjustment frame adopts an adjustable design, which can flexibly adjust the spacing according to the corrugated paper of different thicknesses to ensure accurate positioning; its correction plate adopts a gradually narrowing input port structure, and the guide design from wide to narrow can effectively guide the corrugated paper to enter the equipment smoothly, avoid paper jams or deviations, and ensure the continuity and stability of the production process.

[0012] Thirdly, the spiral channel inside the heat-conducting layer allows the introduced steam to flow in a spiral pattern, achieving uniform heat distribution through the eddy current effect and ensuring the consistency of the overall temperature field of the heat-conducting layer, thereby providing a more stable and efficient preheating effect for corrugated paper. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a preheating device for corrugated cardboard to prevent cracking during corrugation, according to the present invention.

[0014] Figure 2 This is a schematic diagram of the structure of a preheating unit according to the present invention.

[0015] Figure 3 This is a partial structural schematic diagram of a preheating unit according to the present invention.

[0016] Figure 4 This is a schematic diagram of the structure of a scraper according to the present invention.

[0017] Figure 5 This is a schematic diagram of the structure of a preheating roller according to the present invention.

[0018] Figure 6 This is a schematic diagram of the cross-sectional structure of a preheating roller according to the present invention.

[0019] In the diagram: Ventilation grid-1, Preheating box-2, Connection port-3, Inspection plate-4, Preheating group-5, Adjustment frame-51, Dust collection group-52, Exhaust grid-53, Correction plate-54, Scraper frame-55, Preheating roller-56, Connection frame-61, PTFE scraper-62, Bracket-63, Collection trough-64, Divider plate-65, Connecting belt-31, Temperature conductive layer-32, Connecting wheel-33, Rubber layer-34, Inlet-35, Spiral track-36. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings: As attached Figure 1 To be continued Figure 6 As shown: This utility model provides a preheating device for corrugated cardboard to prevent cracking of the corrugated board. Its structure includes a ventilation grid 1, a preheating box 2, a connecting port 3, a maintenance plate 4, and a preheating group 5. The ventilation grid 1 and the preheating box 2 are an integrated structure. The connecting port 3 passes through the preheating box 2 and connects to the preheating group 5. The maintenance plate 4 is located above the preheating box 2. The preheating unit 5 includes an adjustment frame 51, a dust collection unit 52, an exhaust grid 53, a correction plate 54, a scraper 55, and a preheating roller 56. The adjustment frame 51 is installed on the left and right sides of the preheating roller 56. The exhaust grid 53 and the dust collection unit 52 are integrated. The correction plate 54 is connected to the adjustment frame 51. The scraper 55 rests against the surface of the preheating roller 56. There are five preheating rollers 56, which are evenly distributed horizontally. There are five scrapers 55, which are also evenly distributed horizontally.

[0021] The scraper frame 55 includes a connecting frame 61, a PTFE scraper 62, a bracket 63, a collecting trough 64, and a partition plate 65. The PTFE scraper 62 is connected to the bracket 63, and the bracket 63 and the collecting trough 64 are an integrated structure. The partition plate 65 is fixed to the surface of the collecting trough 64. The connecting frame 61 is fixed on the left and right sides of the collecting trough 64. The partition plate 65 divides the collecting trough 64 equally in a horizontal direction. The PTFE scraper 62 is made of a material that can withstand high temperatures on the surface of the preheating roller 56.

[0022] The preheating roller 56 includes a connecting belt 31, a heat-conducting layer 32, a connecting wheel 33, a rubber layer 34, an inlet 35, and a spiral track 36. The connecting belt 31 connects the rubber layer 34 and the connecting wheel 33. The inlet 35 is connected to the heat-conducting layer 32. The spiral track 36 and the heat-conducting layer 32 are an integrated structure. The spiral track 36 can guide the spiral movement of the incoming steam, making the temperature conducted by the heat-conducting layer 32 more uniform. The surface of the rubber layer 34 is provided with rubber strips, which can rotate synchronously with the connecting belt 31.

[0023] The PTFE scraper 62 presses against the surface of the preheating roller 56 to scrape and collect the paper lint attached to its surface. The separator 65 divides the collected paper lint into sections to facilitate the suction treatment by the dust collection unit 52. The PTFE scraper 62 supported by the bracket 63 matches the curvature of the temperature-conducting layer 32. The connecting frame 61 is used to connect the dust collection unit 52.

[0024] The calibration plate 54 has a symmetrical structure with a gradually narrowing inlet to assist in the calibration of corrugated paper entering the equipment. The adjustment frame 51 is adjusted according to the thickness of the corrugated paper being processed. The connecting wheel 33 is connected to a motor and drives the rubber layer 34 to rotate through the connecting belt 31. The surface of the calibration plate 54 has a conveyor belt structure to assist in the input of corrugated paper.

[0025] The preheating unit 5 has a symmetrical structure, which preheats both sides of the corrugated paper at the same time. The connecting port 3 introduces steam into the inlet 35. The dust collection unit 52 can be disassembled to uniformly process the adsorbed paper lint.

[0026] The specific usage and function of this embodiment are as follows: In this invention, steam is introduced through the connector 3 and then into the spiral channel 36 through the inlet 35 to preheat the heat-conducting layer 32 in a spiral state. After the preheating group 5 has finished preheating, corrugated paper is fed into the interior through the correction plate 54. The motor drives the connecting wheel 33 to assist the heat-conducting layer 32 in rotating through the connecting belt 31, thus preheating the surface of the corrugated paper. When the paper lint of the corrugated paper adheres to the surface of the heat-conducting layer 32 through electrostatic adhesion, while the heat-conducting layer 32 rotates, the bracket 63 supports the PTFE scraper 62 to abut against the surface of the heat-conducting layer 32 to scrape off the paper lint. The scraped paper lint is collected in the collection trough 64 through the bracket 63 and collected by the continuously operating suction group 52. After the equipment has finished processing, the suction group 52 can be disassembled to process the paper lint uniformly.

[0027] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.

Claims

1. A preheating device for corrugated cardboard to prevent crimping cracks, comprising a ventilation grid (1), a preheating box (2), a connecting port (3), a maintenance plate (4), and a preheating assembly (5), wherein the ventilation grid (1) and the preheating box (2) are an integrated structure, the connecting port (3) passes through the preheating box (2) and connects to the preheating assembly (5), and the maintenance plate (4) is located above the preheating box (2), characterized in that: The preheating unit (5) includes an adjustment frame (51), a dust collection unit (52), an exhaust grid (53), a correction plate (54), a scraper (55), and a preheating roller (56). The adjustment frame (51) is installed on the left and right sides of the preheating roller (56). The exhaust grid (53) and the dust collection unit (52) are integrated. The correction plate (54) is connected to the adjustment frame (51). The scraper (55) abuts against the surface of the preheating roller (56).

2. The preheating device for corrugated cardboard to prevent cracking according to claim 1, characterized in that: The scraper (55) includes a connecting frame (61), a PTFE scraper (62), a bracket (63), a collection trough (64), and a partition plate (65). The PTFE scraper (62) is connected to the bracket (63). The bracket (63) and the collection trough (64) are an integrated structure. The partition plate (65) is fixed to the surface of the collection trough (64). The connecting frame (61) is fixed on the left and right sides of the collection trough (64).

3. The preheating device for corrugated cardboard to prevent cracking according to claim 1, characterized in that: The preheating roller (56) includes a connecting belt (31), a heat-conducting layer (32), a connecting wheel (33), a rubber layer (34), an inlet (35), and a spiral track (36). The connecting belt (31) connects the rubber layer (34) and the connecting wheel (33). The inlet (35) is connected to the heat-conducting layer (32). The spiral track (36) and the heat-conducting layer (32) are an integrated structure.

4. A preheating device for corrugated cardboard to prevent cracking during corrugation according to claim 2, characterized in that: The PTFE scraper (62) presses against the surface of the preheating roller (56) to scrape and collect the paper lint attached to its surface. The separator (65) divides the collected paper lint into sections, making it convenient for the dust collection unit (52) to perform adsorption treatment.

5. A preheating device for corrugated cardboard to prevent cracking during corrugation, as described in claim 1, characterized in that: The calibration plate (54) has a symmetrical structure with an entrance that gradually narrows to assist in the calibration of corrugated paper entering the equipment. The adjustment frame (51) is adjusted according to the thickness of the corrugated paper being processed.

6. A preheating device for preventing breakage of corrugated paperboard according to claim 1, characterized in that: The preheating unit (5) has a symmetrical structure and preheats both the upper and lower surfaces of the corrugated paper simultaneously.

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