A compression springback control device for a particle board prepressing section

Abstract

The utility model discloses a kind of compression rebound control devices for shaving board pre-pressing section, including machine body, a pair of upper and lower pressure setting is set in the machine body conveying belt device, the conveying belt device includes conveying roller, conveying belt and the compression device of the front end of conveying belt to machine body are connected on conveying roller;It is characterized by: the lower part in the machine body is sequentially fixed with upper pressure roller and upper pressure-maintaining roller from the direction of feed end to discharge end, and the upper part in the machine body is sequentially provided with upper pressure roller and upper pressure-maintaining roller corresponding to lower pressure roller and lower pressure-maintaining roller by compression rebound control assembly, and the compression rebound control assembly is used to control the compression rebound position of upper pressure roller and upper pressure-maintaining roller;The compression rebound control assembly is set, and the position and pressure of upper pressure roller and upper pressure-maintaining roller relative to lower pressure roller and lower pressure-maintaining roller can be accurately and flexibly regulated.

Description

Technical Field

[0001] This utility model relates to the field of particleboard machinery manufacturing technology, specifically a compression and rebound control device for the pre-compression stage of particleboard. Background Technology

[0002] In the particleboard production process, the pre-compression stage is a crucial step. Its main function is to initially compress the loose particleboard blank, expel internal air, and give the blank a certain initial strength and density to facilitate subsequent conveying and hot pressing. However, traditional pre-compression devices often use simple pressure roller structures, which have the following shortcomings: First, the pressure rollers are adjusted separately, but generally, the pressure rollers and the holding rollers (or including the ones at the tail for outputting the board) need to maintain the same pressure, making separate adjustment inconvenient; Second, pressure adjustment requires adjusting the height distance between the upper and lower pressure rollers, and traditional adjustment mechanisms cannot accurately and quickly control the rebound height. This makes it difficult to adapt to the process requirements of particleboard raw materials with different specifications and moisture contents, hindering further improvement in particleboard product quality; in severe cases, it can lead to uneven thickness, inconsistent density, and loose internal structure in the blank before entering the hot press, seriously affecting the mechanical properties, thickness tolerance, and surface quality of the final product.

[0003] Therefore, developing a device that can effectively control the compression and rebound of particleboard blanks during the pre-pressing process is of great significance for improving the stability of particleboard production and product quality. Utility Model Content

[0004] The purpose of this invention is to provide a compression and rebound control device for the pre-compression stage of particleboard, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A compression and rebound control device for a particleboard pre-compression section includes a machine body. A pair of conveyor belts, arranged vertically and vertically in opposition, are disposed within the machine body. Each conveyor belt includes a conveyor roller, a conveyor belt connected to the conveyor roller, and a pressing device connecting the front end of the conveyor belt to the machine body. The device is characterized in that: an upper pressure roller and an upper retaining roller are sequentially fixedly arranged in the lower part of the machine body from the inlet end to the outlet end; and an upper pressure roller and an upper retaining roller are sequentially arranged in the upper part of the machine body via a compression and rebound control component, respectively opposing the lower pressure roller and the lower retaining roller. The compression and rebound control component is used to control the compression and rebound position of the upper pressure roller and the upper retaining roller.

[0007] Preferably, the compression rebound control assembly includes a mounting body disposed in the middle of the machine body, a pressure horizontal plate slidably connected to the left vertical surface of the mounting body, and a pressure roller fixedly connected to the bottom surface of the pressure horizontal plate; the compression rebound control assembly also includes a column disposed at the rear of the machine body, a pressure holding horizontal plate slidably connected to the column, a pressure holding roller fixedly connected to the bottom surface of the pressure holding horizontal plate, and the pressure horizontal plate and the pressure holding horizontal plate fixedly connected; the compression rebound control assembly also includes a compression rebound adjustment device disposed on the side wall of the machine body, and the compression rebound adjustment device is connected to the pressure horizontal plate and the pressure holding horizontal plate.

[0008] Preferably, the compression rebound control device includes a spring seat fixed to the side wall of the machine body, the top surface of the spring seat forming a sliding column, the compression rebound control device also includes two opposing L-shaped blocks, the L-shaped blocks are fixedly connected by a horizontal plate, the horizontal plate is slidably connected to the sliding column, a compression spring is provided between the horizontal plate and the spring seat, a first slide bar and a lead screw motor are fixedly provided on the side wall of the machine body, a first limiting block is slidably connected in the first slide bar, the first limiting block is used to block and limit the movement of the right L-shaped block in the height direction, the limiting block is threadedly connected to the lead screw motor and the height position is controlled by the lead screw motor.

[0009] Preferably, a second slide bar and a threaded hole seat are fixedly provided on the side wall of the machine body. A second limiting block is slidably connected in the second slide bar. The second limiting block is used to block and limit the movement of the L-shaped block on the left side in the height direction. A locking lever handle is threadedly connected in the threaded hole seat. The locking lever handle can be rotated to abut against the side of the L-shaped block on the left side to lock it.

[0010] Preferably, the pressing device includes an upper pressing plate wheel and a lower pressing plate wheel that are pressed against each other. The lower pressing plate wheel is fixedly installed at the bottom of the machine body. The upper pressing plate wheel is rotatably connected to the mounting body. The lower pressing plate wheel is rotatably connected to the cylinder body of a hydraulic cylinder. The telescopic rod of the hydraulic cylinder is slidably and rotatably connected to the upper pressing plate wheel. The extension and retraction of the hydraulic cylinder can adjust the pressing angle of the upper pressing plate wheel.

[0011] Preferably, both the upper and lower pressure rollers are steel cylinder rollers.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model, through its compression and rebound control component, can precisely and flexibly adjust the position and pressure of the upper pressure roller and upper holding pressure roller relative to the lower pressure roller and lower holding pressure roller, thereby accurately managing the compression amount of the particleboard blank during the pressurization and holding pressure stages, i.e., the pre-compression pressure. More specifically, the screw motor in the compression and rebound control device can quickly adjust the first limit block to the required limit height, and then release the second limit block through the locking lever handle; the pressurization horizontal plate and the holding pressure horizontal plate will quickly adjust to the limit height of the first limit block, and then tighten the locking lever handle to abut against the second slide bar for reinforcement and locking, realizing precise and rapid adjustment of the pre-compression pressure.

[0014] 2. By using a hydraulic cylinder in the pressing device, the angle of the upper pressing plate wheel can be infinitely adjusted according to the actual production situation. This optimization enhances the adaptability of the device to different process conditions (such as raw material characteristics, initial thickness of slab, production line speed, etc.), ensuring that the slab can be smoothly and stably introduced into the pressing area, effectively preventing tearing or stacking of the slab head, and improving the stability and production efficiency of the pre-pressing process. Attached Figure Description

[0015] Figure 1 This is a front structural diagram of the present invention;

[0016] Figure 2 for Figure 1 A magnified view of part A in the image;

[0017] Figure 3 for Figure 1 A magnified view of part B in the image;

[0018] Figure 4 for Figure 1 A magnified view of part C;

[0019] Figure 5 for Figure 1 A magnified view of part of D.

[0020] In the diagram: 1-Machine body; 2-Conveyor belt device; 21-Conveyor roller; 22-Conveyor belt; 3-Pressure pressing device; 31-Upper pressure plate wheel; 32-Lower pressure plate wheel; 33-Hydraulic cylinder; 4-Lower pressure roller; 5-Lower pressure holding roller; 6-Compression rebound control assembly; 61-Mounting body; 62-Pressure horizontal plate; 63-Column; 64-Pressure holding horizontal plate; 65-Compression rebound control device; 651-Spring seat; 652-Sliding column; 653-L-shaped block; 654-Horizontal plate; 655-Compression spring; 656-First sliding bar; 657-Screw motor; 658-First limit block; 659-Second sliding bar; 660-Threaded hole seat; 661-Second limit block; 662-Locking lever handle; 7-Upper pressure roller; 8-Upper pressure holding roller. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figures 1 to 5 As shown, this utility model provides a compression and rebound control device for the pre-compression section of particleboard. It includes a body 1, which forms the main support frame of the entire device. Inside the body 1, a pair of conveyor belt devices 2 arranged vertically and perpendicularly are installed. These conveyor belt devices 2 are responsible for clamping and conveying the particleboard blank through the pre-compression area. Specifically, each conveyor belt device 2 includes a conveyor roller 21 and a conveyor belt 22 tensioned and sleeved on the conveyor roller 21. To ensure that the blank can smoothly enter the pressure zone, a pressing device 3 is connected at the front end of the conveyor belt 22, i.e., the feed inlet, to press its front end onto the body 1.

[0023] The core improvement of this invention lies in the arrangement and control method of the pressure-applying and pressure-holding roller system. Specifically, in the lower half of the machine body 1, from the feed end to the discharge end, a lower pressure roller 4 and a lower pressure-holding roller 5 are securely installed sequentially. Preferably, the lower pressure-holding roller 5 and its corresponding upper pressure-holding roller 8 are both made of steel cylinder rollers. This material choice provides sufficient rigidity and wear resistance, enabling it to withstand long-term pressure and maintain a stable roller gap. Correspondingly, in the upper half of the machine body 1, an upper pressure roller 7 and an upper pressure-holding roller 8 are sequentially suspended and installed through a specially designed compression and rebound control assembly 6. The upper pressure roller 7 is positioned directly opposite the lower pressure roller 4, and the two together constitute the main pressure-applying area; while the upper pressure-holding roller 8 is positioned directly opposite the lower pressure-holding roller 5, and the two together constitute the subsequent pressure-holding area. The core function of the compression and rebound control assembly 6 is to precisely control the vertical position of the upper pressure roller 7 and the upper pressure-holding roller 8, thereby dynamically adjusting the pressure applied to the slab and controlling its rebound height adjustment process.

[0024] For further optimizations, see [link / reference]. Figure 1 , Figure 2 , Figure 3 and Figure 4The compression rebound control assembly 6 is specifically configured as follows: It includes a mounting body 61 fixedly installed in the middle region of the machine body 1, which provides a vertical guide surface on the left side. A pressure horizontal plate 62 is connected to this vertical guide surface via a sliding pair (e.g., using a linear guide rail or a slider and a groove), allowing it to slide smoothly in the vertical direction. The upper pressure roller 7 is fixedly installed on the bottom surface of the pressure horizontal plate 62 via bearing seats and other components. At the rear of the machine body 1, one or more columns 63 are fixedly installed, forming another guiding mechanism. A pressure holding horizontal plate 64 is connected to the columns 63 via a similar sliding connection, allowing it to slide in the vertical direction, and the upper pressure holding roller 8 is fixedly installed on the bottom surface of the pressure holding horizontal plate 64. To ensure that the upper pressure roller 7 and the upper pressure holding roller 8 can move together and maintain a stable relative position, the pressure horizontal plate 62 and the pressure holding horizontal plate 64 are fixedly connected together by a robust connecting beam (not shown separately in the figure) to form an integral floating pressure frame. Finally, the compression rebound control assembly 6 also includes a compression rebound adjustment device 65 disposed on the side wall of the body 1. This adjustment device 65 is connected to the above-mentioned floating pressurization frame (i.e., the connecting body with the pressurization horizontal plate 62 and the pressure holding horizontal plate 64), and is responsible for providing controllable force and setting its position limit.

[0025] More specifically, a preferred embodiment of the compression rebound control device 65 includes: a spring seat 651 securely fixed to the side wall of the machine body 1 by bolts or welding, the top surface of which extends upward to form a smooth slide column 652. The device also includes two generally L-shaped blocks 653 arranged opposite each other, connected as a whole by welding or bolting a horizontal plate 654. The horizontal plate 654 has a through hole in its middle or is fitted with a linear bearing, allowing it to be fitted onto the slide column 652 and slide up and down along it. A compression spring 655 is installed between the top surfaces of the horizontal plate 654 and the spring seat 651, providing a constant upward thrust. To precisely control the final upper limit of this spring-slider assembly, a first slide bar 656 and a lead screw motor 657 driven by a servo motor or stepper motor are also fixedly installed on the side wall of the machine body 1. A first limiting block 658 is embedded in the groove of the first sliding bar 656 and can slide up and down along it. The function of this first limiting block 658 is to block and limit the upward movement of the L-shaped block 653 on the right side when it moves to a predetermined height. The first limiting block 658 is connected to the output screw of the lead screw motor 657 through its internal threaded hole. Therefore, by controlling the forward and reverse rotation of the lead screw motor 657, the vertical height of the first limiting block 658 can be precisely adjusted, thereby indirectly setting the highest position of the floating pressure frame under the action of spring force (i.e., the minimum pressure or the maximum rebound space position).

[0026] To further reinforce the position of the pressure frame or to mechanically lock it during debugging and maintenance, a second slide bar 659 and a threaded hole seat 660 with internal threads are fixedly installed on the same or opposite side wall of the body 1. A second limiting block 661 is embedded in the groove of the second slide bar 659 and can be manually adjusted up and down. This second limiting block 661 is used to block and restrict the upward movement of the left L-shaped block 653 from above. Preferably, a locking lever handle 662 is threadedly connected to the threaded hole seat 660. When locking is required, the locking lever handle 662 can be manually rotated so that its end extends forward and tightly abuts against the side of the left L-shaped block 653, using friction to lock and prevent accidental movement.

[0027] Regarding the pressing device 3, a preferred embodiment is as follows: Figure 1 and Figure 5 As shown, it includes a pair of opposing upper pressing plates 31 and lower pressing plates 32. The lower pressing plate 32 is fixedly mounted on the bottom of the machine body 1 via its bearing seat. The upper pressing plate 31 is rotatably connected to the aforementioned mounting body 61 via a bearing. The end of the cylinder of a hydraulic cylinder 33 is rotatably connected to the bearing seat of the lower pressing plate 32 or a fixed point on the machine body 1, while the end of the piston rod (telescopic rod) of the hydraulic cylinder 33 is slidably and rotatably connected to the bearing seat of the upper pressing plate 31 via a hinge joint. By controlling the extension and retraction of the hydraulic cylinder 33, the angle of the upper pressing plate 31 relative to the lower pressing plate 32 and the inlet gap between them can be changed. This design allows the operator to finely adjust the inlet angle and initial pressing force of the slab entering the pressurization zone according to different slab conditions and process requirements. This is crucial for preventing the slab head from bending, folding, or tearing, ensuring the smoothness of the pre-pressing process and the integrity of the slab.

[0028] The working principle and process of this utility model are as follows: The unpressed, pre-laid particleboard blank is first fed between the upper and lower conveyor belts 22. The front end of the blank is initially guided and slightly compacted by the angle-adjustable pressing device 3 (upper and lower pressing rollers), and then fed into the main pressing zone composed of the upper pressing roller 7 and the lower pressing roller 4. In this zone, the blank is subjected to greater pressure to achieve main compression. The compression rebound control component 6 provides a stable initial pressure base through the compression spring 655 in the compression rebound adjustment device 65. The height of the first limit block 658 is adjusted by the screw motor 657 to precisely control its final thickness and density. The blank then enters the holding pressure zone composed of the upper holding pressure roller 8 and the lower holding pressure roller 5, where the pressure is appropriately reduced but kept constant, allowing partial release of the internal stress of the blank, so that the blank stabilizes in a controlled manner. Throughout the process, the adjustment of the angle of the pressing device 3 by the hydraulic cylinder 33 ensures a smooth transition of the blank and avoids quality problems at the inlet. Through this active and adjustable compression and rebound control, this invention significantly improves the quality consistency of the pre-compressed board blank, laying the foundation for the production of high-grade particleboard.

[0029] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A compression and rebound control device for a particleboard pre-pressing section, comprising a machine body (1), wherein a pair of conveyor belt devices (2) are disposed in the machine body (1) and arranged in an upper and lower opposing manner, the conveyor belt device (2) comprising a conveyor roller (21), a conveyor belt (22) connected to the conveyor roller (21), and a pressing device (3) connecting the front end of the conveyor belt (22) to the machine body (1); characterized in that: The lower part of the machine body (1) is fixedly provided with a lower pressure roller (4) and a lower pressure roller (5) in sequence from the feed end to the discharge end. The upper part of the machine body (1) is provided with an upper pressure roller (7) and an upper pressure roller (8) in sequence through a compression rebound control component (6), which are respectively pressed against the lower pressure roller (4) and the lower pressure roller (5). The compression rebound control component (6) is used to control the compression rebound position of the upper pressure roller (7) and the upper pressure roller (8).

2. The compression rebound control device according to claim 1, characterized in that: The compression rebound control assembly (6) includes a mounting body (61) located in the middle of the machine body (1), a pressure horizontal plate (62) slidably connected to the left vertical surface of the mounting body (61), and an upper pressure roller (7) fixedly connected to the bottom surface of the pressure horizontal plate (62); the compression rebound control assembly (6) also includes a column (63) located at the tail of the machine body (1), a pressure holding horizontal plate (64) slidably connected in the column (63), an upper pressure holding roller (8) fixedly connected to the bottom surface of the pressure holding horizontal plate (64), and the pressure horizontal plate (62) and the pressure holding horizontal plate (64) fixedly connected; the compression rebound control assembly (6) also includes a compression rebound adjustment device (65) located on the side wall of the machine body (1), and the compression rebound adjustment device (65) is connected to the pressure horizontal plate (62) and the pressure holding horizontal plate (64).

3. The compression recoil control device of claim 2, wherein: The compression rebound control device (65) includes a spring seat (651) fixed to the side wall of the machine body (1), and a sliding column (652) is formed on the top surface of the spring seat (651). The compression rebound control device (65) also includes two opposing L-shaped blocks (653), which are fixedly connected by a horizontal plate (654). The horizontal plate (654) is slidably connected to the sliding column (652). A compression spring (655) is provided between the horizontal plate (654) and the spring seat (651). A first slide bar (656) and a screw motor (657) are fixedly provided on the side wall of the machine body (1). A first limiting block (658) is slidably connected in the first slide bar (656). The first limiting block (658) is used to block and limit the movement of the right L-shaped block (653) in the height direction. The first limiting block (658) is threadedly connected to the screw motor (657) and the height position is controlled by the screw motor (657).

4. The compression recoil control device of claim 3, wherein: The side wall of the body (1) is fixedly provided with a second slide bar (659) and a threaded hole seat (660). The second slide bar (659) is slidably connected to a second limiting block (661). The second limiting block (661) is used to block and restrict the movement of the L-shaped block (653) on the left side in the height direction. The threaded hole seat (660) is threadedly connected to a locking lever handle (662). The rotatable locking lever handle (662) abuts against the side of the L-shaped block (653) on the left side to lock it.

5. The compression recoil control device of claim 2, wherein: The pressing device (3) includes an upper pressing plate wheel (31) and a lower pressing plate wheel (32) that are pressed together. The lower pressing plate wheel (32) is fixedly installed at the bottom of the machine body (1). The upper pressing plate wheel (31) is rotatably connected to the mounting body (61). The lower pressing plate wheel (32) is rotatably connected to the cylinder body of a hydraulic cylinder (33). The telescopic rod of the hydraulic cylinder (33) is slidably and rotatably connected to the upper pressing plate wheel (31). The extension and retraction of the hydraulic cylinder (33) can adjust the pressing angle of the upper pressing plate wheel (31).

6. The compression recoil control device of claim 1, wherein: Both the upper pressure roller (8) and the lower pressure roller (5) are steel cylinder rollers.

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