A plate ironing structure of a honeycomb paperboard machine

Abstract

The utility model discloses a kind of ironing board structure of honeycomb paperboard machine, including ironing board, ironing board frame and pre-tightening device, ironing board frame includes vertical plate and crossbeam, vertical plate has at least two, crossbeam is equipped with several, several crossbeams are longitudinally evenly arranged;Ironing board is installed on vertical plate;The pre-tightening device is equipped with several groups, and each crossbeam is equipped with at least one group pre-tightening device, pre-tightening device includes first spring, pressure piece and adjusting bolt, first spring is arranged between ironing board and crossbeam, and the both ends of first spring are respectively pressed on ironing board and pressure piece, adjusting bolt passes through crossbeam and acts on pressure piece and adjusts the spacing between pressure piece and ironing board.Pre-tightening device gives first spring certain pre-pressure at initial time, ironing board is longitudinally evenly distributed with first spring, so ironing board is longitudinally stressed evenly, when ironing board produces deformation force by temperature change, first spring can compensate force to ironing board, so that ironing board working surface keeps level.

Description

Technical Field

[0001] This utility model relates to the field of honeycomb paperboard processing equipment, specifically a hot plate structure for a honeycomb paperboard machine. Background Technology

[0002] Honeycomb paperboard is composed of a honeycomb paper core and a facing paper. The high-temperature hot-pressing process not only removes moisture from the honeycomb paperboard but also makes its surface smoother. Existing honeycomb paperboards can be up to 3 meters wide, requiring long hot-pressing plates. However, the use of steam heating for these plates leads to uneven heating and deformation. When the hot-pressing plate deforms, its working surface cannot fully adhere to the honeycomb paperboard, resulting in sections of the paperboard not being fully or completely pressed. This causes weak adhesion between the honeycomb paper core and the facing paper in those sections, making them prone to separation and resulting in an uneven surface. Utility Model Content

[0003] In view of the technical problems existing in the background art, the technical problem solved by this utility model is to provide a heat plate structure for a honeycomb paperboard machine that provides uniform heat pressing and is not easily deformed, so as to make the honeycomb paperboard composite stable and of good quality.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: the ironing plate structure of this honeycomb cardboard machine is characterized by including an ironing plate, an ironing plate frame, and a pre-tightening device. The hot plate rack includes uprights and crossbeams. There are at least two uprights and several crossbeams arranged evenly in the longitudinal direction. The heating plate is mounted on the upright plate, and there is a height difference between the heating plate and the crossbeam; The pre-tightening device is provided in several groups, and each crossbeam is provided with at least one group of pre-tightening devices. The pre-tightening device includes a first spring, a clamping member and an adjusting bolt. The first spring is disposed between the heating plate and the crossbeam, and the two ends of the first spring press on the heating plate and the clamping member respectively. The adjusting bolt passes through the crossbeam and acts on the clamping member to adjust the distance between the clamping member and the heating plate.

[0005] The pre-tightening device of this invention initially applies a certain preload to the first spring. Since the first springs are evenly distributed longitudinally on the heating plate, the longitudinal force on the heating plate is uniform. When the heating plate deforms due to temperature changes, the first springs provide compensating force, keeping the working surface of the heating plate flat. Because the temperature changes at different locations on the heating plate, the resulting deformation force also varies. The preload of the first spring in each pre-tightening device can be adjusted by adjusting bolts, ensuring that the first spring can adequately compensate for the deformation force and guarantee the flatness of the heating plate's working surface.

[0006] Preferably, the clamping member is connected to a guide shaft, which extends into the inner hole of the first spring. The guide shaft positions the first spring and guides its extension and retraction.

[0007] Preferably, the end of the clamping member facing the adjusting bolt has a blind hole for the adjusting bolt to be inserted. This makes the position and interaction between the clamping member and the adjusting bolt more stable.

[0008] Preferably, the clamping element is connected to the adjusting bolt; The adjusting bolt is threadedly connected to the crossbeam. Rotating the adjusting bolt moves it relative to the crossbeam, adjusting the distance between the clamping element and the heating plate, i.e., adjusting the preload of the first spring.

[0009] Preferably, the adjusting bolt is threaded with a first nut, which engages with the crossbeam. The first nut moves relative to the adjusting bolt and presses against the crossbeam, locking the adjusting bolt and preventing it from retracting.

[0010] Preferably, each crossbeam is equipped with at least two sets of pre-tensioning devices. The pre-tensioning devices are evenly distributed in the transverse and longitudinal directions of the heating plate, providing comprehensive compensation for the heating plate and further improving the flatness of the working surface of the heating plate.

[0011] Preferably, the ironing plate is movably mounted on the upright plate. The ironing plate expands and contracts with temperature changes, and its contraction is not restricted, thereby reducing the deformation of the ironing plate.

[0012] Preferably, the hot plate is provided with at least two mounting blocks, and each mounting block is provided with a dovetail groove, which is arranged longitudinally. Both uprights are equipped with sliders that match the dovetail grooves, and the sliders are slidably disposed within the dovetail grooves. The sliding cooperation between the mounting block and the sliders allows the heating plate to be mounted on the uprights, and also allows the heating plate to move relative to the uprights when it expands or contracts, so that the heating plate can remain flat, undeformed, and unbent.

[0013] Preferably, the heat press frame is equipped with a cushioning device. The cushioning device includes a screw, a second spring, and a third spring. One end of the screw has a limit block, and the other end of the screw passes sequentially through the first mounting plate of the heat press frame and the second mounting plate of the machine frame, and is threadedly connected to a second nut. The second and third springs are sleeved on the screw, with the second spring positioned between the limit block and the first mounting plate, and the third spring positioned between the first and second mounting plates. During heat pressing and lamination, the heat press frame presses against the honeycomb cardboard. The cushioning device buffers the pressing action, preventing damage to the honeycomb cardboard from hard impacts, while simultaneously increasing pressure.

[0014] Preferably, the thickness of the hot plate is 25mm-30mm; The heating plate is equipped with a steam channel, which has an air inlet and an air outlet. There are two air inlets and two air outlets, or one air inlet and two air outlets. The diameter of the air inlet is larger than that of the air outlet. Compared to traditional heating plates, it is thinner, which not only saves raw materials and reduces steam consumption, but also heats up faster and more evenly, resulting in less deformation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a partial longitudinal section schematic diagram of the present invention.

[0017] Figure 3 This is a cross-sectional view of the present invention.

[0018] Reference numerals: 1. Hot plate; 11. Air inlet; 12. Air outlet; 13. Mounting block; 14. Steam passage; 2. Hot plate frame; 21. Vertical plate; 22. Crossbeam; 23. Slider; 24. First mounting plate; 3. Pre-tightening device; 31. First spring; 32. Guide shaft; 33. Clamping component; 34. First nut; 35. Adjusting bolt; 36. Blind hole; 4. Buffer device; 41. Screw; 42. Limiting block; 43. Second spring; 44. Third spring; 45. Second nut; 5. Second mounting plate. Detailed Implementation

[0019] The following describes the embodiments and related details and working principle of this utility model with reference to the accompanying drawings. The heat-sealing plate 1 structure of this type of honeycomb cardboard machine includes a heat-sealing plate 1, a heat-sealing plate frame 2, and a pre-tightening device 3. The heat-sealing plate frame 2 includes upright plates 21 and crossbeams 22. There are at least two upright plates 21, and several crossbeams 22 are provided, with the crossbeams arranged longitudinally and evenly. Figure 1 The central panel has two sections, left and right, and the crossbeams have seven sections, with both ends of the crossbeams connected to the central panel. The heating plate 1 is mounted on the central panel 21. There is a height difference between the heating plate and the crossbeams. If the heating plate is fixedly connected to the central panel, its thermal expansion and contraction will be restricted by the central panel, causing the heating plate 1 to bend and deform. To reduce the deformation of the heating plate, the heating plate 1 is movably mounted on the central panel 21. This way, the heating plate is not restricted by the central panel 21 during thermal expansion or cooling contraction, thereby reducing the deformation of the heating plate. (See attached image) Figure 1 and 3One side of the heating plate is the working surface, and the other side is the mounting surface. The mounting surface of the heating plate is provided with at least two mounting blocks 13, and each mounting block is provided with a dovetail groove, which is arranged longitudinally. Both upright plates 21 are provided with sliders 23 that match the dovetail grooves, and the sliders are slidably disposed within the dovetail grooves. The sliding cooperation between the mounting blocks 13 and the sliders 23 allows the heating plate to be mounted on the upright plates, and also allows the heating plate 1 to move relative to the uprights when it expands or contracts, so that the heating plate can remain flat, undeformed, and unbent.

[0020] The pre-tightening device 3 is provided in several sets, with at least one set for each crossbeam 22. In the figure, each crossbeam has three sets, evenly distributed laterally. The pre-tightening device 3 includes a first spring 31, a clamping member 33, and an adjusting bolt 35. The first spring 31 is positioned between the heating plate 1 and the crossbeam 22, with both ends pressing against the heating plate 1 and the clamping member 33 respectively. The adjusting bolt 35 passes through the crossbeam 22, acts on the clamping member 33, and adjusts the distance between the clamping member and the heating plate. The smaller the distance between the clamping member and the heating plate, the greater the preload of the first spring. Initially, the pre-tightening device 3 applies a certain preload to the first spring 31. The heating plate has the first springs evenly distributed longitudinally and laterally, ensuring uniform force distribution. When the heating plate deforms due to temperature changes, the first spring 31 provides compensating force to the heating plate 1, keeping the working surface of the heating plate flat. Because the temperature changes at different locations on the heating plate, the amount of deformation produced also varies. By adjusting the bolt 35, the preload of the first spring 31 of each pre-tightening device is adjusted so that the first spring can adequately compensate for the deformation force, ensuring the flatness of the heating plate working surface. The flatness of the heating plate working surface and its complete adhesion to the honeycomb paperboard result in uniform heating of the paperboard, high drying efficiency, firm adhesion between the face paper and the honeycomb paper core, and a flat honeycomb paperboard surface, thereby improving the composite quality and product quality.

[0021] The clamping member 33 is connected to a guide shaft 32, which extends into the inner hole of the first spring 31. The guide shaft positions the first spring 31 and guides its extension and contraction. The end of the clamping member 33 facing the adjusting bolt 35 has a blind hole 36 for inserting the adjusting bolt, making the position and interaction between the clamping member 33 and the adjusting bolt 35 more stable. The adjusting bolt is movably connected to the clamping member and the crossbeam, or it can be threaded. That is, the clamping member 33 is connected to the adjusting bolt 35, and the adjusting bolt 35 is threadedly connected to the crossbeam 22. Rotating the adjusting bolt moves it relative to the crossbeam, adjusting the distance between the clamping member 33 and the heating plate 1, thus adjusting the preload of the first spring. To prevent the adjusting bolt 35 from retracting, the adjusting bolt 35 is threadedly connected to a first nut 34. The first nut cooperates with the crossbeam, moving relative to the adjusting bolt 35 and pressing it against the crossbeam 22, locking the adjusting bolt 35 and preventing it from retracting.

[0022] The heat press frame 2 is equipped with a buffer device 4. During heat pressing and lamination, the heat press plate is pressed against the honeycomb cardboard, and the buffer device 4 acts as a buffer to prevent damage to the honeycomb cardboard from hard impacts, while also increasing the pressure. The buffer device 4 includes a screw 41, a second spring 43, and a third spring 44. One end of the screw is provided with a limit block 42, and the other end of the screw passes through the first mounting plate 24 of the heat press frame and the second mounting plate 5 of the machine frame in sequence, and is threadedly connected to the second nut 45. The crossbeam 22 can also serve as the first mounting plate 24. The second spring 43 and the third spring 44 are sleeved on the outside of the screw 41. The second spring 43 is located between the limit block 42 and the first mounting plate 24, and the third spring 44 is located between the first mounting plate 24 and the second mounting plate 5. When the heating plate 1 moves and presses against the honeycomb paperboard, the second spring 43 and the third spring 44 can absorb more energy and impact, which protects both the heating plate 1 and the honeycomb paperboard. The second nut 45 can also be rotated to reduce or expand the distance between it and the limiting block 42, thereby changing the initial deformation of the second spring 43 and the third spring 44 to meet the buffering force and support force required for the heating plate 1 to press against the honeycomb paperboard.

[0023] The thickness of the heating plate 1 is 25mm-30mm, which is thinner than the traditional heating plate of 150-60mm, saving raw materials and reducing steam consumption, making it more suitable for the application of the pre-tightening device 3. The heating plate 1 is provided with a steam channel 14, which has an air inlet 11 and an air outlet 12. There are two air inlets and two air outlets, which can heat up faster and more evenly, thus reducing deformation. Alternatively, there can be one air inlet and two air outlets. The diameter of the air inlet 11 is larger than that of the air outlet 12, so that the air intake of the air inlet 11 is larger than that of the two air inlets 12, which can also achieve the effect of fast heating and even heating.

Claims

1. A heat exchanger structure for a honeycomb cardboard machine, characterized in that: It includes a hot ironing plate, a hot ironing plate rack, and a pre-tightening device. The hot plate rack includes uprights and crossbeams. There are at least two uprights and several crossbeams arranged evenly in the longitudinal direction. The heating plate is mounted on the upright plate, and there is a height difference between the heating plate and the crossbeam; The pre-tightening device is provided in several groups, and each crossbeam is provided with at least one group of pre-tightening devices. The pre-tightening device includes a first spring, a clamping member and an adjusting bolt. The first spring is disposed between the heating plate and the crossbeam, and the two ends of the first spring press on the heating plate and the clamping member respectively. The adjusting bolt passes through the crossbeam and acts on the clamping member to adjust the distance between the clamping member and the heating plate.

2. The heat exchanger structure of the honeycomb cardboard machine according to claim 1, characterized in that: The clamping member is connected to a guide shaft, which extends into the inner hole of the first spring.

3. The heat exchanger structure of the honeycomb cardboard machine according to claim 1, characterized in that: The clamping member has a blind hole at the end facing the adjusting bolt for the adjusting bolt to be inserted.

4. The heat exchanger structure of the honeycomb cardboard machine according to claim 1, characterized in that: The clamping element is connected to the adjusting bolt; The adjusting bolt is threadedly connected to the crossbeam.

5. The heat exchanger structure of the honeycomb cardboard machine according to any one of claims 1-4, characterized in that: The adjusting bolt is threaded with a first nut, which engages with the crossbeam.

6. The heat exchanger structure of the honeycomb cardboard machine according to claim 1, characterized in that: Each beam is equipped with at least two sets of pretensioning devices.

7. The heat exchanger structure of the honeycomb cardboard machine according to claim 1, characterized in that: The heating plate is movably mounted on the upright plate.

8. The heat exchanger structure of the honeycomb cardboard machine according to claim 7, characterized in that: The hot plate is provided with at least two mounting blocks, and the mounting blocks are provided with dovetail grooves, which are arranged longitudinally. Both upright plates are equipped with sliders that match the dovetail grooves, and the sliders are slidably disposed within the dovetail grooves.

9. The heat exchanger structure of the honeycomb cardboard machine according to claim 1, characterized in that: The hot plate frame is equipped with a buffer device; the buffer device includes a screw, a second spring and a third spring. One end of the screw is provided with a limit block, and the other end of the screw passes through the first mounting plate of the hot plate frame and the second mounting plate of the machine frame in sequence and is threadedly connected to the second nut. The second spring and the third spring are sleeved on the outside of the screw. The second spring is located between the limit block and the first mounting plate, and the third spring is located between the first mounting plate and the second mounting plate.

10. The heat exchanger structure of the honeycomb cardboard machine according to claim 1, characterized in that: The thickness of the hot plate is 25mm-30mm; The heating plate is provided with a steam channel, which has an air inlet and an air outlet. There are two air inlets and two air outlets, or there is one air inlet and two air outlets. The diameter of the air inlet is larger than that of the air outlet.

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