Medium-density fiberboard hot-press forming equipment adopting correction overlying mechanism

Abstract

The invention discloses medium-density fiberboard hot-press forming equipment adopting a correction overlying mechanism, and particularly relates to the field of plate hot-press forming. The medium-density fiberboard hot-press forming equipment comprises a hot press, two sets of lifting sliding rails are symmetrically installed on the side wall of the hot press, and threaded rods are rotationally arranged in the lifting sliding rails; auxiliary mounting plates in sliding fit with the lifting sliding rails are in threaded connection with the outer walls of the threaded rods, a surface layer optimizing part for shaping the surface of the plate blank is arranged between the two sets of auxiliary mounting plates, and a permeation promoting part for promoting permeation of glue in the plate blank is arranged on one side of the shaping part. The pattern wheel periodically vibrates to promote uniform permeation of glue, the leveling roller and the lower alignment roller cooperatively flatten the surface and the edge of the plate blank, and the cleaning air pipe performs high-pressure dust removal, so that a correction overlying mechanism is formed, and the defects of glue agglomeration, surface concavo-convex, edge curling, impurity pollution and the like are effectively eliminated; the plate blank enters the hot-pressing process in a flat and dust-free state, and the quality stability of a finished product is comprehensively improved.

Description

Technical Field

[0001] This invention relates to the field of hot pressing technology for sheet metal, and more specifically, to a hot pressing equipment for medium-density fiberboard employing a modified stacking mechanism. Background Technology

[0002] Medium-density fiberboard (MDF) is made from wood fibers, which are hot-ground, dried, glued, laid out, and pre-pressed into blanks, and then hot-pressed into finished boards.

[0003] In traditional processes, uneven glue penetration after gluing often leads to insufficient interlayer bonding strength, making it prone to delamination or deformation. At the same time, unevenness on the surface of the board and curling at the edges can cause local stress concentration during hot pressing, resulting in thickness deviations or surface defects.

[0004] In addition, impurities such as fiber debris and glue particles remaining on the surface of the press plate will embed into the plate during the hot pressing process, forming surface stains or interlayer foreign objects, further reducing the product qualification rate.

[0005] To address the aforementioned technical shortcomings, a solution is provided. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a medium density fiberboard hot pressing forming device employing a modified lamination mechanism.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A medium-density fiberboard hot pressing molding equipment employing a modified stacking mechanism includes a hot press. Two sets of lifting slide rails are symmetrically installed on the side wall of the hot press. A threaded rod is rotatably provided inside the lifting slide rail. An auxiliary mounting plate that slides and engages with the lifting slide rail is threadedly connected to the outer wall of the threaded rod. A surface optimization component for shaping the surface of the board blank is provided between the two sets of auxiliary mounting plates. A penetration-promoting component for promoting the penetration of glue into the board blank is provided on one side of the shaping component.

[0009] The surface optimization component includes a mounting shaft rotatably disposed between two auxiliary mounting plates, a lower alignment roller fixedly disposed on the outer wall of the mounting shaft, and a leveling roller disposed above the lower alignment roller;

[0010] The penetration-enhancing component includes two sets of drive gears respectively arranged on both sides of the mounting shaft. A receiving plate is fixedly provided on the outer wall of the auxiliary mounting plate. Two sets of vibration shafts are rotatably arranged between the two sets of receiving plates. Several flower-shaped wheels are fixedly provided on the outer wall of the vibration shaft.

[0011] Furthermore, an upper connecting shaft is provided at the center of the leveling roller, and movable blocks are rotatably provided on both sides of the upper connecting shaft. An active groove is provided on the auxiliary mounting plate to slide with the movable blocks, and a limiting shaft is provided vertically in the active groove to slide with the movable blocks.

[0012] Furthermore, a thrust spring is provided between the top wall of the movable groove and the top wall of the movable block, and a tension spring is provided between the bottom wall of the movable groove and the bottom wall of the movable block.

[0013] Furthermore, the flower-shaped wheels are evenly distributed on the outer wall of the vibration shaft, and the flower-shaped wheels are made of rubber.

[0014] Furthermore, the two sets of vibration shafts are connected by a transmission component, which includes two sets of transmission wheels. The transmission wheels are fixedly connected to the vibration shafts, and a transmission belt is provided between the two sets of transmission wheels.

[0015] Furthermore, a fan is fixedly installed on one of the auxiliary mounting plates, and a cleaning duct is provided above both sets of auxiliary mounting plates.

[0016] Furthermore, the output diameter of the cleaning duct gradually decreases, and the output of the cleaning duct is positioned facing the pressure plate of the hot press.

[0017] Furthermore, the fan and the cleaning duct are connected via a delivery pipe.

[0018] The medium-density fiberboard hot-pressing process employing a modified lamination mechanism includes the following steps:

[0019] Step 1, Blank Conveying: Send the blank between vertically adjacent pressure plates and repeat equal displacement adjustments.

[0020] Step 2: Vibration of the patterned wheel promotes glue penetration: Two sets of vibrating shafts drive the patterned wheel to rotate synchronously, applying periodic vibration to the board blank to promote uniform glue penetration and prevent local agglomeration;

[0021] Step 3: Leveling Roller Dynamically Trimming Flat Board: After the board has been fully glued, the leveling roller and the lower alignment roller form a dynamic clamping structure. The elastic pressure adjusts the unevenness of the board surface and optimizes the pressure distribution to automatically trim the rolled edges.

[0022] Step 4: Clean the air ducts and remove dust using high pressure.

[0023] Step 5, Hot Press Forming: After all the blanks have been conveyed, start the hot press for forming.

[0024] The technical effects and advantages of this invention are as follows:

[0025] 1. The present invention uses multiple sets of patterned wheels installed above two sets of vibration shafts to rotate synchronously under the drive of the vibration shafts, and apply periodic vibration to the moving blank. This vibration can effectively promote the uniform penetration of glue inside the blank and prevent glue from agglomerating in a local area, thereby ensuring the quality of the finished product of the blank in the subsequent hot pressing process.

[0026] 2. In this invention, after the board blank has undergone glue penetration treatment and before it enters between two pressure plates, the leveling roller above the lower alignment roller applies elastic pressure to the surface of the board blank under the synergistic action of the push spring and the tension spring. The leveling roller and the lower alignment roller form a dynamic clamping structure, which can not only adjust the unevenness of the board blank surface, but also automatically smooth the rolled edges of the board blank through pressure distribution optimization. Ultimately, it ensures that the board blank enters the hot pressing process of the pressure plate in a flat and uniform state, which significantly improves the stability of the finished product quality.

[0027] 3. This invention controls the start of a fan to deliver stable air pressure to a pre-laid clean air duct. The clean air duct is laid out above the pressure plate according to a preset path, and its air outlet sprays high-pressure airflow at a specific angle and wind speed. The continuous air pressure thoroughly blows away dust, debris and other impurities accumulated on the surface of the pressure plate, thereby creating a dust-free processing environment before the blank is placed into the pressure plate, effectively avoiding surface defects or poor interlayer bonding caused by impurities. Attached Figure Description

[0028] Figure 1 This is a perspective view of the overall structure of the present invention.

[0029] Figure 2 This is a cross-sectional view of the internal structure of the surface optimization component and the penetration enhancement component in this invention.

[0030] Figure 3 This is a three-dimensional view of the internal structure of the surface optimization component and the penetration enhancement component in this invention.

[0031] Figure 4 This is an enlarged schematic diagram of the structure of region A in this invention.

[0032] Figure 5 This is an enlarged perspective view of the structure of the vibration shaft of the flower-shaped wheel in this invention.

[0033] Figure 6 This is a three-dimensional view of the structure of the cleaning duct in this invention.

[0034] The attached diagram is labeled as follows: 1. Hot press; 2. Press plate; 31. Lifting slide rail; 32. Threaded rod; 34. Auxiliary mounting plate; 41. Lower alignment roller; 42. Vibrating shaft; 43. Patterned wheel; 44. Transmission component; 45. Drive gear; 46. Driven gear; 47. Receiving plate; 51. Leveling roller; 52. Upper connecting shaft; 53. Limiting shaft; 54. Thrust spring; 55. Movable block; 56. Tension spring; 61. Cleaning duct; 62. Fan; 63. Conveying pipe. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1: Please refer to Figures 1-6 As shown, in the existing technology, the board blanks often suffer from insufficient interlayer bonding strength due to uneven glue penetration after glue application, which easily leads to delamination or deformation. Furthermore, problems such as unevenness on the board blank surface and curling at the edges can easily cause local stress concentration during hot pressing, resulting in thickness deviation or surface defects. The following solutions can be used to address these issues.

[0037] This embodiment employs a medium-density fiberboard hot pressing molding equipment with a modified stacking mechanism, including a hot press 1. Two sets of lifting slide rails 31 are symmetrically installed on the side wall of the hot press 1. A threaded rod 32 is rotatably provided inside the lifting slide rail 31, and a motor driving the threaded rod 32 is provided at the bottom of the lifting slide rail 31. An auxiliary mounting plate 34 that slides and engages with the lifting slide rail 31 is threadedly connected to the outer wall of the threaded rod 32. A surface optimization component for shaping the board blank is provided between the two sets of auxiliary mounting plates 34. A penetration-promoting component for promoting the penetration of glue into the board blank is provided on one side of the shaping component.

[0038] The surface optimization component includes a mounting shaft rotatably disposed between two auxiliary mounting plates 34, a lower alignment roller 41 fixedly disposed on the outer wall of the mounting shaft, and a leveling roller 51 disposed above the lower alignment roller 41;

[0039] The leveling roller 51 has an upper connecting shaft 52 at its center. Movable blocks 55 are rotatably provided on both sides of the upper connecting shaft 52. The auxiliary mounting plate 34 has a movable groove that slides with the movable blocks 55. A limiting shaft 53 that slides with the movable blocks 55 is vertically provided in the movable groove. A thrust spring 54 is provided between the top wall of the movable groove and the top wall of the movable block 55. A tension spring 56 is provided between the bottom wall of the movable groove and the bottom wall of the movable block 55.

[0040] The penetration enhancement component includes two sets of drive gears 45 respectively set on both sides of the mounting shaft. A receiving plate 47 is fixed on the outer wall of the auxiliary mounting plate 34. Two sets of vibration shafts 42 are rotatably arranged between the two sets of receiving plates 47. Several flower-shaped wheels 43 are fixed on the outer wall of the vibration shaft 42. The flower-shaped wheels 43 are evenly distributed on the outer wall of the vibration shaft 42.

[0041] It should be noted that: the vibratory shaft 42 can be set to multiple sets, and the specific number can be set according to actual production requirements; the flower-shaped wheel 43 is made of rubber.

[0042] The two sets of vibrating shafts 42 are connected by a transmission component 44. The transmission component 44 includes two sets of transmission wheels, which are fixedly connected to the vibrating shafts 42. A transmission belt is provided between the two sets of transmission wheels. That is, when one set of vibrating shafts 42 rotates, it drives the transmission wheel to rotate. The transmission wheel causes the other set of transmission wheels to rotate through the transmission belt, thereby realizing the rotation of the two sets of vibrating shafts 42 and the rotation of multiple sets of patterned wheels 43. Driven gears 46 are fixedly provided on both sides of the set of vibrating shafts 42 near the lower alignment roller 41. The driven gears 46 are meshed with the driving gears 45.

[0043] The working principle of this embodiment is as follows:

[0044] Process 1: Control the motor to make the two threaded rods 32 rotate synchronously, drive the lower alignment roller 41 to move upward evenly, and keep the top of the lower alignment roller 41 aligned with the top wall of the pressure plate 2 when each displacement increment is completed. After the blank is sent between two vertically adjacent pressure plates 2, control the lower alignment roller 41 to move upward by the same amount of displacement, thereby completing the conveying of all blanks. Then, the hot press 1 completes the hot pressing forming of the blanks.

[0045] The above process is achieved through a PLC programmable logic controller: the PLC controls the dual motors to synchronously drive the threaded rod 32, uses an encoder to monitor the displacement, and a laser sensor to detect the alignment status. After each increment is in place, the deviation is automatically corrected to ensure that the lower alignment roller 41 is precisely aligned with the top wall of the pressure plate 2, thus completing the blank conveying and hot pressing forming. The laser sensor is installed near the top of the lower alignment roller 41 and connected to the auxiliary mounting plate 34, facing the top wall of the pressure plate 2, to ensure that the laser beam is perpendicularly irradiated on the surface of the top wall of the pressure plate 2, so as to accurately detect the distance and offset between the two.

[0046] Process 2: In the above process 1, when the blank is fed between two pressure plates 2: When the blank is fed between two vertically adjacent pressure plates 2, first place one side of the blank stably above multiple sets of patterned wheels 43, and at the same time apply a horizontal inward thrust to the blank so that the blank is in close contact with the top of the lower alignment roller 41.

[0047] As the blank moves horizontally under the action of thrust, the friction between it and the top of the lower alignment roller 41 causes the mounting shaft inside the lower alignment roller 41 to rotate synchronously. The mounting shaft transmits the rotational power to a set of vibration shafts 42 near the lower alignment roller 41 through the meshing of the drive gear 45 and the driven gear 46, so that it starts to rotate. This set of vibration shafts 42 then transmits the power synchronously to another set of vibration shafts 42 through the transmission component 44, so as to realize the linkage rotation of the two sets of vibration shafts 42.

[0048] Finally, the multiple flower-shaped wheels 43 installed above the two sets of vibration shafts 42 rotate synchronously under the drive of the vibration shafts 42 and apply periodic vibration to the moving blank. This vibration can effectively promote the uniform penetration of glue inside the blank and prevent glue from agglomerating in some areas, thereby ensuring the quality of the finished product in the subsequent hot pressing process.

[0049] Process 3: In Process 2 above, after the board blank has completed the glue penetration treatment, before entering between the two pressure plates 2, the leveling roller 51 above the lower alignment roller 41 applies elastic pressure to the surface of the board blank under the synergistic action of the push spring 54 and the tension spring 56. The leveling roller 51 and the lower alignment roller 41 form a dynamic clamping structure, which can not only adjust the unevenness of the board blank surface, but also automatically smooth the rolled edges of the board blank through pressure distribution optimization, ultimately ensuring that the board blank enters the hot pressing process of the pressure plate 2 in a flat and uniform state, significantly improving the stability of the finished product quality.

[0050] Example 2: Please refer to Figure 1 , 4 As shown in -6, the following solutions can be used to address the problem that impurities such as fiber debris and glue particles remaining on the surface of the pressure plate 2 can be embedded in the board during the hot pressing process, forming surface stains or interlayer foreign objects.

[0051] In this embodiment, a fan 62 is fixedly installed on a set of auxiliary mounting plates 34, and a cleaning air duct 61 is provided above the two sets of auxiliary mounting plates 34. The output diameter of the cleaning air duct 61 gradually decreases, and the output of the cleaning air duct 61 is set towards the pressure plate 2 of the hot press 1.

[0052] The blower 62 is connected to the clean air duct 61 via a delivery pipe 63. By controlling the operation of the blower 62, external air is delivered to the clean air duct 61 through the delivery pipe 63 to remove impurities above the pressure plate 2 with high-pressure airflow.

[0053] It should be noted that a filter screen structure for air filtration is usually installed on the inlet side of the fan 62 to prevent external impurities from being present in the high-pressure clean air.

[0054] The working principle of this embodiment is as follows:

[0055] In the slab processing process, to ensure the quality of the finished product, the PLC controls the start of the fan 62 to deliver stable air pressure to the pre-laid clean air duct 61. The clean air duct 61 is laid out above the pressure plate 2 according to the preset path, and its air outlet sprays high-pressure airflow at a specific angle and wind speed. The continuous air pressure thoroughly blows away the dust, debris and other impurities accumulated on the surface of the pressure plate 2, thereby creating a dust-free processing environment before the slab is placed into the pressure plate 2, effectively avoiding surface defects or poor interlayer bonding caused by impurities.

[0056] As can be seen from Embodiments 1 and 2 of this invention:

[0057] The three processes of periodic vibration of the patterned wheel 43 to promote uniform glue penetration, the coordinated repair of the flat blank surface and edges by the leveling roller 51 and the lower alignment roller 41, and the high-pressure dust removal by the PLC-controlled cleaning duct 61 are linked to correct the stacking mechanism and effectively eliminate defects such as glue agglomeration, surface unevenness, edge curling and impurity contamination. This ensures that the flat blank enters the hot pressing process in a flat and dust-free state, and comprehensively improves the stability of finished product quality.

[0058] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A medium-density fiberboard hot pressing forming device employing a modified lamination mechanism, comprising a hot press (1), characterized in that, Two sets of lifting slide rails (31) are symmetrically installed on the side wall of the hot press (1). A threaded rod (32) is rotatably provided inside the lifting slide rail (31). An auxiliary mounting plate (34) that slides with the lifting slide rail (31) is threadedly connected to the outer wall of the threaded rod (32). A surface optimization component for shaping the surface of the board blank is provided between the two sets of auxiliary mounting plates (34). A penetration-promoting component for promoting the penetration of glue into the board blank is provided on one side of the shaping component. The surface optimization component includes a mounting shaft rotatably disposed between two auxiliary mounting plates (34), a lower alignment roller (41) fixedly disposed on the outer wall of the mounting shaft, and a leveling roller (51) disposed above the lower alignment roller (41). The permeation-promoting component includes two sets of drive gears (45) respectively arranged on both sides of the mounting shaft. A receiving plate (47) is fixedly provided on the outer wall of the auxiliary mounting plate (34). Two sets of vibration shafts (42) are rotatably arranged between the two sets of receiving plates (47). Several flower-shaped wheels (43) are fixedly provided on the outer wall of the vibration shaft (42).

2. The medium-density fiberboard hot pressing forming equipment using a modified lamination mechanism according to claim 1, characterized in that: The leveling roller (51) has an upper connecting shaft (52) at its center. Movable blocks (55) are rotatably provided on both sides of the upper connecting shaft (52). The auxiliary mounting plate (34) has a movable groove that slides with the movable block (55). A limiting shaft (53) that slides with the movable block (55) is vertically provided in the movable groove.

3. The medium-density fiberboard hot pressing forming equipment using a modified lamination mechanism according to claim 2, characterized in that: A thrust spring (54) is provided between the top wall of the movable groove and the top wall of the movable block (55), and a tension spring (56) is provided between the bottom wall of the movable groove and the bottom wall of the movable block (55).

4. The medium-density fiberboard hot pressing forming equipment using a modified lamination mechanism according to claim 1, characterized in that: The flower-shaped wheels (43) are evenly distributed on the outer wall of the vibration shaft (42), and the flower-shaped wheels (43) are made of rubber.

5. The medium-density fiberboard hot pressing forming equipment using a modified lamination mechanism according to claim 1, characterized in that: The two sets of vibration shafts (42) are connected by a transmission component (44), which includes two sets of transmission wheels. The transmission wheels are fixedly connected to the vibration shafts (42), and a transmission belt is provided between the two sets of transmission wheels.

6. The medium-density fiberboard hot pressing forming equipment using a modified lamination mechanism according to claim 1, characterized in that: A fan (62) is fixedly installed on one set of the auxiliary mounting plates (34), and a cleaning duct (61) is provided above both sets of the auxiliary mounting plates (34).

7. The medium-density fiberboard hot pressing forming equipment using a modified lamination mechanism according to claim 6, characterized in that: The output diameter of the cleaning duct (61) gradually decreases, and the output port of the cleaning duct (61) is set towards the pressure plate (2) of the hot press (1).

8. The medium-density fiberboard hot pressing forming equipment using a modified lamination mechanism according to claim 7, characterized in that: The fan (62) and the clean air duct (61) are connected by a delivery pipe (63).

9. A medium-density fiberboard hot-pressing forming process employing a modified lamination mechanism, characterized in that: The medium-density fiberboard hot pressing forming equipment with a modified lamination mechanism as described in any one of claims 1-8 includes the following steps: Step 1, Blank conveying: Send the blank between the vertically adjacent pressure plates (2) and repeat equal displacement adjustment; Step 2: Vibration of the pattern wheel (43) to promote glue penetration: Two sets of vibration shafts (42) drive the pattern wheel (43) to rotate synchronously, apply periodic vibration to the board blank, promote uniform glue penetration, and prevent local agglomeration; Step 3: Leveling roller (51) dynamically trims the blank: After the blank has been fully penetrated by glue, the leveling roller (51) and the lower alignment roller (41) form a dynamic clamping structure. The elastic pressure adjusts the unevenness of the blank surface and optimizes the pressure distribution to automatically trim the edge curling. Step 4: Clean the air duct (61) with high-pressure dust removal; Step 5, Hot pressing: After all the blanks are conveyed, start the hot press (1) to form.

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