A multi-layer high-efficiency hot press

Abstract

This invention discloses a multi-layer high-efficiency hot press, including a frame, a worktable, a hot press plate assembly, and a hydraulic station. The worktable is located in the middle of the frame, and its bottom is equipped with a pressure cylinder driven by the hydraulic station, which can drive the worktable to move longitudinally. The hot press plate assembly consists of multiple layers of horizontally stacked hot press plates, with the interlayer distance adjusted by the lifting of the worktable. Each hot press plate is equipped with an independent conveying assembly. The conveying assembly includes a drive roller assembly, a tension roller assembly, and an outer annular conveyor belt, with staggered micro-actuators driven by a drive chain. The micro-actuators of the upper and lower hot press plates are arranged in opposite directions and in a staggered layout, effectively optimizing the structural space and reducing the width of the equipment. The overall structure of the equipment is compact, achieving efficient and uniform multi-layer synchronous hot pressing processing, and its operation is stable and reliable.

Description

Technical Field

[0001] This invention belongs to the technical field of hot pressing equipment, specifically relating to a multi-layer high-efficiency hot press. Background Technology

[0002] Hot presses, as key equipment that apply heat and pressure to materials to achieve molding, bonding, or curing, are widely used in many industrial fields such as engineered wood products, composite materials, decorative building materials, and electronic products.

[0003] Currently, most hot presses on the market, especially small and medium-sized machines, are single-layer or double-layer structures. These traditional machines can typically only process a single batch of workpieces sequentially, resulting in a significant bottleneck in production efficiency, which can no longer meet the urgent needs of modern manufacturing for large-scale, high-efficiency production.

[0004] To increase production capacity, some solutions attempt to simply increase the number of hot press plates. However, this simple stacking brings a series of new technical challenges: First, the drive system layout of multi-layer hot press plates is complex. If each layer is equipped with an independent drive motor, the equipment will have a large lateral dimension and a bulky structure. Spatial interference can easily occur between the drive components, and the power transmission path will be chaotic, making maintenance difficult. Second, ensuring that the worktable can provide continuous, stable, and uniform pressing force to the multi-layer hot press plates under enormous pressure, and preventing quality defects in the workpiece due to uneven stress, is a key challenge. In addition, the spacing adjustment between the hot press plates of traditional hot presses is not flexible enough, making it difficult to quickly adapt to the processing needs of workpieces of different thicknesses, reducing the versatility of the equipment.

[0005] In terms of structure, traditional frame designs often lack sufficient rigidity and stability for multi-layer, high-tonnage equipment. Long-term high-load operation can easily lead to deformation, affecting equipment lifespan and processing accuracy. At the same time, the large amount of heat generated during hot pressing is conducted to the frame, not only wasting energy but also potentially causing structural thermal stress deformation, further affecting equipment accuracy.

[0006] Therefore, there is an urgent need in this field for a new type of multi-layer high-efficiency hot press that can fundamentally solve the above problems and achieve the production goals of high efficiency, high quality, compact structure, stable operation and flexible adjustment. Summary of the Invention

[0007] This invention provides a multi-layer high-efficiency hot press, including a frame as the outer frame and a worktable located in the middle of the frame. A hot press plate assembly is arranged above the worktable, and several pressure cylinders are arranged below the worktable for driving the longitudinal extension and retraction of the worktable. A hydraulic station for driving the pressure cylinders is arranged outside the frame. The hot press plate assembly includes multiple layers of horizontally stacked hot press plates, and the longitudinal distance between the hot press plates can be adjusted by raising and lowering the worktable. Each hot press plate is provided with a conveying assembly, which includes a drive roller assembly and a tension roller assembly. The drive roller assembly, the hot press plates, and the tension roller assembly are covered by an annular conveyor belt.

[0008] Preferably, the hot press plate assembly includes a first hot press plate, a second hot press plate, a third hot press plate, and a fourth hot press plate arranged in a horizontally stacked manner, and each of the first hot press plate, the second hot press plate, the third hot press plate, and the fourth hot press plate is provided with a drive roller assembly.

[0009] Preferably, the drive roller assembly includes a drive shaft and a miniature driver disposed on one side of the drive shaft.

[0010] Preferably, the drive shafts on the first and second hot press plates are arranged on the same side as the drive shafts on the third and fourth hot press plates, the micro-drivers of the first and second hot press plates are arranged on the same side, the micro-drivers of the third and fourth hot press plates are arranged on the same side, and the micro-drivers of the first and second hot press plates are in opposite directions to the micro-drivers of the third and fourth hot press plates.

[0011] Preferably, gears are provided on the output shafts of the micro-drivers on the second and fourth hot press plates, and gears are provided on the drive shafts on the second and fourth hot press plates. The gears on the micro-drivers cooperate with the gears on the drive shafts through chains, driving the drive shafts to rotate and forming a misaligned structure with the micro-drivers on the first and third hot press plates, further increasing the compression size of the pressure space.

[0012] Preferably, the frame includes two sets of rectangular tubes arranged symmetrically, each set of rectangular tubes including one rectangular tube. The top of the symmetrical rectangular tubes is fixed by several crossbeams and longitudinal beams. Two sets of lifting hooks are set on the longitudinal beams for lifting the entire equipment. Guide plates are set in the middle of the two symmetrical rectangular tubes at the edge of the frame. The guide plates include a rectangular base plate fixed to the rectangular tube and a stepped baffle on the inner side of the rectangular base plate. A set of crossbeams and longitudinal beams are set in the lower middle part of the frame for setting the worktable and limiting the minimum stroke of the worktable. The worktable is rectangular plate-shaped, and pressure cylinders are evenly distributed at the bottom.

[0013] Preferably, an upper heat insulation plate is provided between the bottom of the upper crossbeam of the frame and the first hot press plate, and a hot press top plate is provided at the bottom of the upper heat insulation plate.

[0014] Preferably, several guide wheels are provided on both sides of the hot press plate, and blocks are also provided on both sides of the frame corresponding to the second and fourth hot press plates.

[0015] The beneficial effects of this invention are as follows: by setting up multiple layers of horizontally stacked hot press plates and independently configuring a conveying assembly consisting of a drive roller, a tension roller, and a ring conveyor belt for each hot press plate, simultaneous and synchronous hot pressing of multiple workpieces is achieved. This fundamentally changes the sequential operation mode of single-layer or double-layer hot presses, multiplying production capacity and greatly improving production efficiency; it also employs miniature actuators arranged on the same side but with opposite drive directions, and staggered between the same group of hot press plates. Specifically, the drive systems for the upper first and second hot press plates and the lower third and fourth hot press plates are set on the same side but with opposite drive directions. Simultaneously, the micro-drives within the same group are staggered and use drive chains for staggered transmission. This design significantly saves lateral installation space and effectively avoids structural interference caused by the size of the drives, resulting in a more compact overall structure and reduced equipment footprint. Multiple pressure cylinders driven by a central hydraulic station are evenly distributed at the bottom of the worktable, providing stable, uniform, and powerful vertical pressure to the worktable and the upper multi-layer hot press plates. This pressure distribution ensures that each hot press plate applies consistent pressure to the workpiece, effectively avoiding problems such as uneven pressure, product deformation, or poor hot pressing effects that may occur with traditional equipment, thus guaranteeing the stability and consistency of product quality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the frame mechanism of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 This is a front view of the overall structure of the present invention; Figure 4 This is a left view of the overall structure of the present invention; Figure 5 This is a top view of the overall structure of the present invention; Figure 6 yes Figure 4 A magnified view of a portion of point A in the middle.

[0017] in: 1-Frame, 11-Rectangular tube, 12-Crossbeam, 13-Longitudinal beam, 14-Guide plate, 15-Lifting hook, 16-Stop block 2-Workbench, 21-Pressure cylinder, 3-Hot press plate assembly, 31-First hot press plate, 32-Second hot press plate, 33-Third hot press plate, 34-Fourth hot press plate, 35-Hot press top plate, 36-Upper insulation board, 37-Rectangular bottom plate, 38-Stepped baffle, 4-Conveyor assembly, 41-Drive roller assembly, 42-Tension roller assembly, 411-Miniature driver, 412-Drive shaft, 43-Guide wheel, 44-Circular conveyor belt, 45-Conveyor chain 5-Hydraulic station. Detailed Implementation

[0018] 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.

[0019] like Figure 1 , Figure 2 As shown, a multi-layer high-efficiency hot press includes a frame 1, a worktable 2, hot press plate assemblies 3, a conveying assembly 4, and a hydraulic station 5. These components work together to achieve synchronous and efficient hot pressing of multi-layer workpieces. The frame 1 serves as the outer frame of the entire equipment, supporting and fixing all other components to ensure overall stability. The worktable 2 is horizontally positioned in the middle of the frame 1, serving as the supporting base for the hot press plate assemblies 3 and simultaneously driving their lifting and lowering motion. The hot press plate assemblies 3 are stacked on top of the worktable 2 to bear the workpieces and apply hot pressing. The conveying assembly 4 is located on each hot press plate for automatic workpiece feeding and unloading. The hydraulic station 5 is located outside the frame 1, providing power for the lifting and lowering of the worktable 2.

[0020] like Figure 1 As shown, the frame 1 includes two sets of rectangular tubes 11 arranged symmetrically, each set of rectangular tubes 11 including 4 tubes. The top of the symmetrical rectangular tubes 11 is fixed by several crossbeams 12 and longitudinal beams 13. Two sets of lifting hooks 15 are set on the longitudinal beams 13 to facilitate the hoisting of the whole equipment. Guide plates 14 are respectively set in the middle of the two symmetrical rectangular tubes 11 at the edge of the frame 1. The guide plate 14 includes a rectangular base plate 37 fixed to the rectangular tube 14 and a stepped baffle 38 on the inner side of the rectangular base plate 37. A set of crossbeams 12 and longitudinal beams 13 are set in the lower part of the rectangular tube 14 to set the worktable 2 and limit the minimum stroke of the worktable 2. The stepped baffle 38 is integrally formed with the rectangular base plate 37 and has a total of 3 steps to guide and limit the lifting and lowering of the hot press plate, prevent the hot press plate from deviating to the left or right during the lifting and lowering process, and ensure the parallelism of each layer of hot press plate.

[0021] like Figures 2 to 4As shown, the workbench 2 is rectangular, with several pressure cylinders 21 evenly distributed at the bottom. The pressure cylinders 21 are driven by the hydraulic station 5 to extend and retract longitudinally, causing the workbench 2 to rise and fall. A hot press plate assembly 3 is set between the upper part of the workbench 2 and the upper crossbeam 12 of the frame 1. The hot press plate assembly 3 includes a first hot press plate 31, a second hot press plate 32, a third hot press plate 33 and a fourth hot press plate 34 that are stacked laterally. The longitudinal distance between the hot press plates can be adjusted by the rise and fall of the workbench 2. An upper heat insulation plate 36 is set between the bottom of the upper crossbeam 12 of the frame 1 and the first hot press plate 31. A hot press top plate 35 is set at the bottom of the upper heat insulation plate 36.

[0022] like Figures 3 to 5 As shown, each hot press plate is equipped with a conveying assembly 4. The conveying assembly 4 includes a drive roller assembly 41 on one side of the hot press plate and a tension roller assembly 42 on the other side. The drive roller assembly 41, the hot press plate, and the tension roller assembly 42 are completely covered by an annular conveyor belt 44. The drive roller assembly 41 includes a drive shaft 412 and a micro-driver 411 on one side of the drive shaft 412. The drive roller assemblies 41 on the first hot press plate 31 and the second hot press plate 32 are arranged on the same side as the drive roller assemblies 41 on the third hot press plate 33 and the fourth hot press plate 34, but the direction of the micro-driver 411 on the first hot press plate 31 and the second hot press plate 32 is opposite to that on the third hot press plate 33 and the fourth hot press plate 34. The micro-actuators 411 of the first and second hot press plates 31 and 32 are arranged in opposite directions. The drive roller assemblies 41 on the first hot press plate 31 and 32, as well as the drive roller assemblies 41 on the third and fourth hot press plates 33 and 34, are all located on the same side of the hot press plates, facilitating overall layout and maintenance. However, the micro-actuators 411 of the first and second hot press plates 31 and 32 are arranged in opposite directions to the micro-actuators 411 of the third and fourth hot press plates 33 and 34. That is, the micro-actuators 411 of the first and second hot press plates 31 and 32 are arranged facing the left side of the frame 1, while the micro-actuators 411 of the third and fourth hot press plates 33 and 34 are arranged facing the right side of the frame 1. At the same time, the micro-actuators 411 on the first and second hot press plates 31 and 32 are staggered along the width direction of the hot press plates, and the micro-actuators 411 on the third and fourth hot press plates 33 are also staggered along the width direction of the hot press plates. This layout effectively avoids spatial interference between drive components, significantly optimizes the horizontal structural space of the equipment, reduces the overall width of the equipment by more than 35%, and makes the structure more compact. At the same time, it facilitates the independent maintenance and repair of each micro-drive 411. A transmission chain 45 is set on one side of the staggered micro-drive 411, and several guide wheels 43 are symmetrically set on both sides of the heating plate. Blocks 16 are also set on both sides of the frame 1 corresponding to the positions of the second hot press plate 32 and the fourth hot press plate 34.

[0023] The specific operation process during installation and use is as follows: 1. Equipment Installation: First, use hoisting equipment to lift the frame 1 to a flat area on the ground using the lifting hook 15. Adjust the level of the frame 1, and then fix the frame 1 to the ground using expansion bolts. Next, install the workbench 2, pressure cylinder 21, and hydraulic station 5, and connect the hydraulic pipelines to ensure that the hydraulic pipelines are well sealed and leak-free. Then, install the hot press plate assembly 3 and the conveying assembly 4 in sequence, and adjust the parallelism and spacing of each hot press plate to ensure that each component is installed in place and operates flexibly. Finally, connect the electrical control system, debug the operating parameters of each component, and ensure that the equipment operates normally.

[0024] 2. Parameter settings: Based on the thickness, material, and hot pressing requirements of the workpiece to be hot-pressed, the lifting speed and hot pressing pressure of the worktable 2 are adjusted through the control system of the hydraulic station 5, the hot pressing temperature is adjusted through the heating system of the hot pressing plate, the conveying speed of the conveying component 4 is adjusted through the control system of the micro driver 411, and the hot pressing time is set (the hot pressing time can be adjusted within the range of 10-600s). After the parameter settings are completed, the equipment is started for preheating. After the temperature of the hot pressing plate reaches the set value and stabilizes, the feeding operation begins.

[0025] 3. Synchronous Feeding and Hot Pressing: The sheet material to be hot pressed is conveyed to the circular conveyor belt 44 of the four-layer hot press plate via the conveyor at the feeding end. The conveyor assembly 4 drives the sheet material to be hot pressed smoothly to the center position of the hot press plate, completing the feeding. At this time, the pressure cylinder 21 at the bottom of the worktable 2 extends synchronously under the drive of the hydraulic station 5, driving the worktable 2 to rise slowly. The hot press plate assembly 3 rises accordingly, and the distance between each layer of hot press plates gradually decreases, applying uniform pressure to the workpiece. At the same time, the hot press plate continues to heat the workpiece, maintaining the set hot pressing temperature and pressure, entering the hot pressing stage. After hot pressing is completed, the pressure cylinder 21 slowly retracts, driving the worktable 2 to descend. The distance between the hot press plates gradually increases, relieving the pressure on the workpiece. Subsequently, the conveyor assembly 4 starts again, driving the hot-pressed sheet material to be output from the discharge end, completing the discharge. At this time, one working cycle of this equipment is completed, and the next working cycle can begin in a loop.

Claims

1. A multi-layer high-efficiency hot press, comprising a frame (1) as an outer frame and a worktable (2) disposed in the middle of the frame (1), characterized in that: A hot press plate assembly (3) is provided above the workbench (2), and several pressure cylinders (21) are provided below the workbench (2) for driving the workbench (2) to extend and retract longitudinally. A hydraulic station (5) for driving the pressure cylinders (21) is provided outside the frame (1). The hot press plate assembly (3) includes multiple layers of horizontally stacked hot press plates. The longitudinal distance between the hot press plates can be adjusted by the lifting and lowering of the workbench (2). Each hot press plate is provided with a conveying assembly (4). The conveying assembly (4) includes a drive roller assembly (41) and a tension roller assembly (42). The drive roller assembly (41), the hot press plate and the tension roller assembly (42) are covered with an annular conveyor belt (44).

2. The multi-layer high-efficiency hot press according to claim 1, characterized in that: The hot press plate assembly (3) includes a first hot press plate (31), a second hot press plate (32), a third hot press plate (33) and a fourth hot press plate (34) arranged in a horizontally stacked manner. A drive roller assembly (41) is provided on the first hot press plate (31), the second hot press plate (32), the third hot press plate (33) and the fourth hot press plate (34).

3. A multi-layer high-efficiency hot press according to claim 2, characterized in that: The drive roller assembly (41) includes a drive shaft (412) and a micro-driver (411) disposed on one side of the drive shaft (412).

4. A multi-layer high-efficiency hot press according to claim 3, characterized in that: The drive shafts (412) on the first hot press plate (31) and the second hot press plate (32) are arranged on the same side as the drive shafts (412) on the third hot press plate (33) and the fourth hot press plate (34). The micro actuators (411) of the first hot press plate (31) and the second hot press plate (32) are arranged on the same side. The micro actuators (411) of the third hot press plate (33) and the fourth hot press plate (34) are arranged on the same side. The micro actuators (411) of the first hot press plate (31) and the second hot press plate (32) are in opposite directions to the micro actuators (411) of the third hot press plate (33) and the fourth hot press plate (34).

5. A multi-layer high-efficiency hot press according to claim 4, characterized in that: Gears are provided on the output shafts of the micro-drivers (411) on the second hot press plate (32) and the fourth hot press plate (34), and gears are provided on the drive shafts (412) on the second hot press plate (32) and the fourth hot press plate (34). The gears on the micro-drivers (411) cooperate with the gears on the drive shafts (412) through a chain, driving the drive shafts (412) to rotate. At the same time, they form a misaligned structure with the micro-drivers (411) on the first hot press plate (31) and the third hot press plate (33), further increasing the compression size of the pressure space.

6. A multi-layer high-efficiency hot press according to claim 5, characterized in that: The frame (1) includes two sets of rectangular tubes (11) arranged symmetrically. Each set of rectangular tubes (11) includes four rectangular tubes. The top of the symmetrical rectangular tubes (11) is fixed by several crossbeams (12) and longitudinal beams (13). Two sets of lifting hooks (15) are arranged symmetrically on the longitudinal beams (13) for hoisting the overall equipment. Guide plates (14) are respectively arranged in the middle of the two symmetrical rectangular tubes (11) on the edge of the frame (1). The guide plate (14) includes a rectangular base plate (37) fixed to the rectangular tubes (11) and a stepped baffle (38) on the inner side of the rectangular base plate (37). A set of crossbeams (12) and longitudinal beams (13) are arranged in the lower part of the frame (1) for setting the workbench (2) and limiting the minimum stroke of the workbench (2). The workbench (2) is rectangular plate-shaped, and the pressure cylinders (21) are evenly distributed at the bottom.

7. A multi-layer high-efficiency hot press according to claim 6, characterized in that: An upper heat insulation plate (36) is provided between the bottom of the upper crossbeam (12) of the frame (1) and the first hot press plate (31), and a hot press top plate (35) is provided at the bottom of the upper heat insulation plate (36).

8. A multi-layer high-efficiency hot press according to claim 7, characterized in that: Several guide wheels (43) are provided on both sides of the hot press plate, and baffles (16) are also provided on both sides of the frame (1) corresponding to the second hot press plate (32) and the fourth hot press plate (34).

Images