Four-stage cold press suitable for pressing multi-size boards

Abstract

The utility model discloses a four -section type cold press suitable for multi -size board pressing, belong to solid wood board processing equipment technical field, including the stand, frame, platen subassembly and hydraulic drive arrangement, and the fixed connection of frame lower extreme and stand, and hydraulic drive arrangement is installed in the just above of stand through frame, and hydraulic drive arrangement includes a plurality of hydraulic pressure rod, and platen subassembly is fixed in the lower extreme of hydraulic pressure rod, platen subassembly includes four independent platen, and the length ratio is 1:2:2:1 in proper order, hydraulic drive arrangement includes the hydraulic control unit corresponding with each section platen, and each hydraulic control unit is independently connected to corresponding hydraulic pressure rod. The utility model breaks through the size limit of traditional single section or double section platen, avoids the size deviation caused by the splicing pressing of multiple equipment when the large -size board is pressed, and also solves the technical problem such as the large energy consumption of integral type long platen to press the small -size board, and the difficult accurate adaptation.

Description

Technical Field

[0001] This utility model belongs to the technical field of solid wood board processing equipment, specifically relating to a four-section cold press suitable for pressing multi-size boards. Background Technology

[0002] Cold presses are crucial equipment in the panel processing industry, widely used in the stamping, compression, and pressing processes of wood, composite materials, and other panels. Their pressing precision and versatility directly affect the flatness, structural stability, and yield of the finished panels. Especially for high-precision products such as decorative panels and structural load-bearing panels, the multi-size adaptability and simultaneous pressing effect of cold presses are core elements for ensuring processing quality.

[0003] Current mainstream cold presses typically employ a 3-meter processing space design, equipped with one or two pressure plates for synchronous pressing. However, for processing ultra-long sheets up to 6 meters in length, existing equipment has significant drawbacks: a single 3-meter cold press cannot be accommodated due to insufficient processing space, requiring two machines to be used together, complicating the pressing process. Furthermore, the joint is prone to uneven local stress due to asynchronous pressure plate movements, increasing the risk of sheet bending and deformation. In addition, 6-meter sheets are generally thinner, requiring higher precision in the timing coordination of multiple pressure plates during pressing, which existing segmented pressure plate structures cannot meet. While a 6-meter overall length cold press can accommodate ultra-long sheets, its fixed pressure plate structure cannot flexibly adjust the pressing area, leading to energy waste and low equipment utilization when pressing small-sized sheets. Moreover, excessively long rigid pressure plates are prone to uneven local stress, affecting pressing quality and limiting its applicability.

[0004] Therefore, there is an urgent need to provide a segmented cold press that combines multi-size adaptability, high synchronization accuracy, and optimized energy efficiency to solve the problems of insufficient platen segmentation and limited processing range in existing technologies. Summary of the Invention

[0005] In response to the problems in related technologies, this utility model proposes a four-section cold press suitable for pressing multi-size plates, so as to solve the technical problems of poor multi-size adaptability and limited processing range of existing cold presses.

[0006] The technical solution of this utility model is implemented as follows: a four-section cold press suitable for pressing multi-size plates includes a platform, a frame, a pressing plate assembly and a hydraulic drive device. The upper surface of the platform is a horizontal platform. The lower end of the frame is fixedly connected to the platform. The hydraulic drive device is installed above the platform through the frame. The hydraulic drive device includes multiple vertically downward extending and symmetrically distributed hydraulic pressure rods. The pressing plate assembly is fixed to the lower end of the hydraulic pressure rods.

[0007] The pressure plate assembly includes four independent pressure plates arranged sequentially along the length of the platform. The length ratio of the four pressure plates is 1:2:2:1, where the first pressure plate has a length of L, the second and third pressure plates each have a length of 2L, and the fourth pressure plate has a length of L, with L ranging from 0.8 to 1.2 meters. Each pressure plate is independently driven by a hydraulic pressure rod and can perform pressing actions individually or in combination to accommodate sheet materials of 1L, 2L, 3L, 4L, 5L, and 6L lengths. The hydraulic drive device includes a hydraulic control unit corresponding to each pressure plate, and each hydraulic control unit is independently connected to the corresponding hydraulic pressure rod.

[0008] As a further improvement to the above solution, the first and fourth pressure plates are each driven by two hydraulic rods symmetrically arranged along the width of the platform, with the two hydraulic rods spaced apart along the front-back direction of the platform; the second and third pressure plates are each driven by four hydraulic rods, with the four hydraulic rods distributed at the four corners of a rectangle. The first and fourth pressure plates are driven by symmetrical double hydraulic rods, with the two hydraulic rods equidistantly distributed along the width direction, ensuring that the pressure center is always located at the geometric center of the pressure plate, avoiding tilting of the pressure plate caused by single-point pressure, and ensuring uniform pressing of the thin plate edges; the second and third pressure plates form a rectangular support surface through the four hydraulic rods distributed at the four corners, significantly improving the bending stiffness of the pressure plates, especially for the easily deformable area in the middle of the 6-meter thin plate, the synchronous pressure at the four corners can eliminate the risk of warping during long-span pressing.

[0009] As a further improvement to the above solution, the fixed end of the hydraulic pressure rod is connected to the top of the frame via a mounting base. The top of the frame is provided with a first frame plate and a second frame plate extending along the width of the platform, and at least one vertical reinforcing partition is welded between the two frame plates. The first frame plate and the second frame plate extending along the width of the platform form a continuous support surface, which evenly transmits the concentrated load of the hydraulic pressure rod to the frame. In conjunction with the reinforcing partition, it effectively blocks the transmission of vibration caused by the pressing impact, improves the structural strength of the frame, and ensures the stability and reliability of the frame when the hydraulic pressure rod is applied.

[0010] As a further improvement to the above solution, the shelf surface is a planar structure with an overall length of 6 meters, and its flatness meets the requirement that the difference in diagonal length does not exceed 3mm. Flatness control based on the diagonal is more effective in suppressing torsional deformation and reducing the warping rate of the finished product than single-point elevation measurement.

[0011] As a further improvement to the above solution, the pressure plate assembly is provided with a number of first guide racks equal to the number of hydraulic pressure rods. Each first guide rack is fixed vertically to the upper end of each independent pressure plate and close to the hydraulic pressure rod of the corresponding pressure plate.

[0012] The frame is equipped with a first guide gear that meshes with a first guide rack. The first guide gear is mounted on a transmission shaft extending along the width direction of the frame via bearings. In the width direction, a first guide rack is provided at the position of the pressure plate corresponding to the hydraulic pressure rod, which meshes with the first guide gear to force the pressure plate to press down along a vertical trajectory, eliminating the tilting of the pressure plate caused by the uneven load of the hydraulic cylinder.

[0013] As a further improvement to the above scheme, the second pressure plate and the third pressure plate are also provided with a second guide rack. Each second guide rack is fixed vertically to the upper end of each independent pressure plate and is located between two first guide racks.

[0014] The tooth surfaces of each second guide rack are perpendicular to each other. The frame is equipped with second guide gears that mesh with the second guide racks. These second guide gears are mounted on a drive shaft extending along the length of the frame via bearings. A second guide rack with perpendicular tooth surfaces is added to the middle of the longer sections of the second and third pressure plates, meshing with the gears on the drive shaft along the length, to suppress torsional deformation of the pressure plates caused by excessive span. The width and length dual guide gear sets form a spatial right-angle constraint, effectively reducing synchronization errors during the pressing of multiple pressure plates and improving the pressing quality of the plates.

[0015] As a further improvement to the above solution, the hydraulic drive device includes a hydraulic pump station mounted on the top of the frame. The hydraulic pump station is connected to the hydraulic rods corresponding to each section of the pressure plate through independent hydraulic control units. The hydraulic control units are configured with individually operable solenoid valves, which control the oil circuit opening and closing. The hydraulic control units allow for independent operation to ensure the pressing accuracy of a single section; during combined pressing, multiple valves corresponding to the hydraulic pressure plates are opened and closed simultaneously to achieve synchronous pressing of multiple sections of the pressure plates.

[0016] As a further improvement to the above solution, the frame includes multiple supporting columns arranged around the perimeter of the platform. Each supporting column has a cross-section of a square steel pipe of 200mm × 200mm or larger, and the total height of the supporting columns is less than 2500mm. The square steel pipe cross-section of 200mm × 200mm or larger effectively increases the moment of inertia compared to traditional columns, ensuring the structural stability of the frame. The total height of the supporting columns being less than 2500mm avoids instability caused by excessive height.

[0017] Beneficial effects:

[0018] By setting the pressure plate assembly as four independent pressure plates with a length ratio of 1:2:2:1, using L as the base unit, it can be freely combined to cover continuous size sheets from 1L to 6L. A single independent pressure plate is suitable for 1L or 2L short sheets, such as the first pressure plate pressing a 1L or 2L sheet; the first pressure plate works synchronously with the second pressure plate to achieve cold pressing of a 3L sheet; the second pressure plate works synchronously with the third pressure plate to achieve cold pressing of a 4L sheet; the second and third pressure plates, working in conjunction with the first or fourth pressure plate, achieve multi-segment linkage to achieve cold pressing of a 5L sheet; and the entire pressure plate works synchronously to achieve cold pressing of a 6L sheet. This invention breaks through the size limitations of traditional single-segment or double-segment pressure plates, avoiding dimensional deviations caused by multiple machines splicing and pressing large-size sheets, and solving problems such as high energy consumption and difficulty in precise adaptation when pressing small-size sheets with a single long pressure plate, effectively improving the equipment's versatility. Attached Figure Description

[0019] Figure 1 This is a perspective view of the dismantling of the hydraulic pump station according to this utility model;

[0020] Figure 2 This is a front view of the hydraulic pump station being dismantled according to this utility model;

[0021] Figure 3 This is a top view of the hydraulic pump station dismantling according to this utility model;

[0022] Figure 4 This is a side view of the hydraulic pump station being dismantled according to this utility model;

[0023] Figure 5 This is a cross-sectional schematic diagram of the present invention;

[0024] Figure label:

[0025] 1. Storage table;

[0026] 2. Frame; 21. First frame plate; 22. Second frame plate; 23. Reinforcing partition; 24. First guide gear; 25. Second guide gear; 26. Support column;

[0027] 3. Pressure plate assembly; 31. First pressure plate; 32. Second pressure plate; 33. Third pressure plate; 34. Fourth pressure plate; 35. First guide rack; 36. Second guide rack;

[0028] 4. Hydraulic drive unit; 41. Hydraulic pressure rod; 42. Hydraulic pump station. Detailed Implementation

[0029] 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 a part of the embodiments of the present utility model, and not all of them. 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.

[0030] In the description of this utility model, it should be understood that the term "several" means "at least one", and the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] Example:

[0032] like Figures 1-5 As shown, this embodiment provides a four-section cold press suitable for pressing multi-size sheets, including a platform 1, a frame 2, a pressure plate assembly 3, and a hydraulic drive device 4. The upper surface of the platform 1 is a horizontal placement surface. The lower end of the frame 2 is fixedly connected to the platform 1. The hydraulic drive device 4 is installed directly above the platform 1 via the frame 2. The hydraulic drive device 4 includes multiple vertically extending and symmetrically distributed hydraulic pressure rods 41. The pressure plate assembly 3 is fixed to the lower end of the hydraulic pressure rods 41. The frame 2 consists of a closed frame structure formed by six supporting columns 26 and a top connecting beam. The platform 1 is embedded in the bottom of the supporting columns 26.

[0033] In this embodiment, the placement surface of the platform 1 is a planar structure with an overall length of 6 meters, and its flatness meets the requirement that the difference in diagonal length does not exceed 3mm. Flatness control based on the diagonal is more effective in suppressing torsional deformation and reducing the warpage of the finished product than single-point elevation measurement.

[0034] In this embodiment, the frame 2 includes multiple supporting columns 26 arranged around the perimeter of the platform 1. Each supporting column 26 has a cross-section of a square steel pipe of 200mm × 200mm or more, and the total height of the supporting columns 26 is less than 2500mm. The square steel pipe cross-section of 200mm × 200mm or more effectively increases the moment of inertia compared to traditional columns, ensuring the structural stability of the frame 2. The total height of the supporting columns 26 being less than 2500mm avoids instability caused by excessive height.

[0035] The pressure plate assembly 3 includes four independent pressure plates arranged sequentially along the length of the platform 1. The length ratio of the four pressure plates is 1:2:2:1. Specifically, the first pressure plate 31 is 1 meter long, the second pressure plate 32 is 2 meters long, the third pressure plate 33 is 2 meters long, and the fourth pressure plate 34 is 1 meter long, with L=1 meter.

[0036] Each pressure plate is driven independently by a hydraulic pressure rod 41, and can perform pressing actions individually or in combination to adapt to plates with lengths of 1 meter, 2 meters, 3 meters, 4 meters, 5 meters and 6 meters; the hydraulic drive device 4 includes a hydraulic control unit corresponding to each pressure plate, and each hydraulic control unit is independently connected to the corresponding hydraulic pressure rod 41.

[0037] The hydraulic drive device 4 includes a hydraulic pump station 42 mounted on the top of the frame 2. The hydraulic pump station 42 is connected to the hydraulic pressure rods 41 corresponding to each section of the pressure plate through independent hydraulic control units. The hydraulic control units are configured as solenoid valves that can be opened and closed independently. The hydraulic control units can be set up to ensure the single-section pressing accuracy by opening and closing independently; during combined pressing, the valves corresponding to multiple hydraulic pressure plates can be opened and closed simultaneously to achieve synchronous pressing of multiple sections of the pressure plates.

[0038] In this embodiment, the first pressure plate 31 and the fourth pressure plate 34 are driven by two hydraulic pressure rods 41 symmetrically arranged along the width direction of the platform 1, with the two hydraulic pressure rods 41 spaced apart along the front-back direction of the platform 1; the second pressure plate 32 and the third pressure plate 33 are driven by four hydraulic pressure rods 41, with the four hydraulic pressure rods 41 distributed at the four corners of a rectangle. The first pressure plate 31 and the fourth pressure plate 34 are driven by symmetrical double hydraulic pressure rods 41, with the two hydraulic pressure rods 41 equidistantly distributed along the width direction, so that the pressure center is always located at the geometric center of the pressure plate, avoiding the tilting of the pressure plate caused by single-point pressure, and ensuring the uniformity of the pressing of the thin plate edge; the second pressure plate 32 and the third pressure plate 33 form a rectangular support surface through the four hydraulic pressure rods 41 distributed at the four corners, which significantly improves the bending stiffness of the pressure plate, especially for the easily deformable area in the middle of the 6-meter thin plate, the synchronous pressure at the four corners can eliminate the risk of warping during long-span pressing.

[0039] In this embodiment, the fixed end of the hydraulic pressure rod 41 is connected to the top of the frame 2 via a mounting base. The top of the frame 2 is provided with a first frame plate 21 and a second frame plate 22 extending along the width direction of the platform 1. At least one vertical reinforcing partition 23 is welded between the two frame plates. The first frame plate 21 and the second frame plate 22 extending along the width of the platform 1 form a continuous support surface, which evenly transmits the concentrated load of the hydraulic pressure rod 41 to the frame 2. In conjunction with the reinforcing partition 23, it effectively blocks the transmission of vibration caused by the pressing impact, improves the structural strength of the frame 2, and ensures that the frame 2 is stable and reliable when the hydraulic pressure rod 41 applies pressure.

[0040] In this embodiment, the pressure plate assembly 3 is provided with a number of first guide racks 35 equal to the number of hydraulic pressure rods 41. Each first guide rack 35 is fixed vertically to the upper end of each independent pressure plate and close to the hydraulic pressure rod 41 of the corresponding pressure plate.

[0041] The frame 2 is provided with a first guide gear 24 that meshes with the first guide rack 35. The first guide gear 24 is mounted on a transmission shaft extending along the width direction of the frame 2 via bearings. In the width direction, the first guide rack 35, which is provided at the position of the pressure plate corresponding to the hydraulic pressure rod 41, meshes with the first guide gear 24, forcing the pressure plate to press down along a vertical trajectory, thus eliminating the tilting of the pressure plate caused by the uneven load of the hydraulic cylinder.

[0042] In this embodiment, the second pressure plate 32 and the third pressure plate 33 are also provided with second guide racks 36. Each second guide rack 36 is fixed to the upper end of each independent pressure plate in the vertical direction and is located between two first guide racks 35.

[0043] The tooth surfaces of each second guide rack 36 are perpendicular to each other. The frame 2 is equipped with a second guide gear 25 that meshes with the second guide racks 36. The second guide gear 25 is mounted on a transmission shaft extending along the length of the frame 2 via bearings. A second guide rack 36 with perpendicular tooth surfaces is added to the middle of the longer sections of the second pressure plate 32 and the third pressure plate 33, meshing with the gear on the transmission shaft along the length, to suppress the torsional deformation of the pressure plate caused by excessive span. The width and length dual guide gear sets form a spatial right-angle constraint, effectively reducing synchronization errors during the pressing of multiple pressure plates and improving the pressing quality of the plates.

[0044] In specific applications, the above-described solution of this utility model allows for the following: by setting the pressure plate assembly 3 as four independent pressure plates with a length ratio of 1:2:2:1, and using L as the reference unit, it can be freely combined to cover continuous size plates from 1L to 6L.

[0045] Its working principle is as follows: when pressing in a single section or in combination, the solenoid valve corresponding to the target pressure plate is opened, and the hydraulic oil drives the hydraulic rod 41 of each target pressure plate to press down, while the other solenoid valves are closed.

[0046] A single-section independent pressing is suitable for short boards of 1 meter or 2 meters, such as the first pressing plate 31 pressing a 1 meter or 2 meter board;

[0047] The first pressure plate 31 works in sync with the second pressure plate 32 to achieve cold pressing of 3-meter-long sheet metal.

[0048] The second pressure plate 32 works in tandem with the third pressure plate 33 to achieve cold pressing of 4-meter-long sheet metal.

[0049] The second and third pressure plates 33, together with the first pressure plate 31 or the fourth pressure plate 34, can work together in multiple stages to achieve cold pressing of 5-meter-long sheets.

[0050] The entire pressure plate is synchronized and linked to achieve cold pressing of 6-meter-long sheets.

[0051] The four-section cold press provided in this embodiment breaks through the size limitations of traditional single-section or double-section press plates. It avoids the size deviation caused by multiple machines splicing and pressing when pressing large-size plates, and solves the problems of high energy consumption and difficulty in precise adaptation when pressing small-size plates with an integral long press plate, thus effectively improving the versatility of the equipment.

[0052] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A four-section cold press suitable for pressing multi-size sheets, comprising a worktable, a frame, a pressure plate assembly, and a hydraulic drive device, wherein the upper surface of the worktable is a horizontal work surface, the lower end of the frame is fixedly connected to the worktable, the hydraulic drive device is mounted above the worktable via the frame, and the hydraulic drive device includes multiple vertically downward extending and symmetrically distributed hydraulic pressure rods, the pressure plate assembly being fixed to the lower end of the hydraulic pressure rods; characterized in that: The pressure plate assembly includes four independent pressure plates arranged sequentially along the length of the platform. The length ratio of the four pressure plates is 1:2:2:1, where the first pressure plate has a length of L, the second and third pressure plates each have a length of 2L, and the fourth pressure plate has a length of L, with L ranging from 0.8 to 1.2 meters. Each pressure plate is independently driven by a hydraulic pressure rod and can perform pressing actions individually or in combination to accommodate sheet materials of 1L, 2L, 3L, 4L, 5L, and 6L lengths. The hydraulic drive device includes a hydraulic control unit corresponding to each pressure plate, and each hydraulic control unit is independently connected to the corresponding hydraulic pressure rod.

2. The four-section cold press for pressing multi-size plates according to claim 1, characterized in that, The first and fourth pressure plates are each driven by two hydraulic rods symmetrically arranged along the width of the platform, with the two hydraulic rods spaced apart along the front-back direction of the platform; the second and third pressure plates are each driven by four hydraulic rods, with the four hydraulic rods distributed at the four corners of a rectangle.

3. A four-section cold press suitable for pressing multi-size plates according to claim 2, characterized in that, The fixed end of the hydraulic rod is connected to the top of the frame via a mounting base. The top of the frame is provided with a first frame plate and a second frame plate extending along the width direction of the platform. At least one vertical reinforcing partition is welded between the two frame plates.

4. A four-section cold press suitable for pressing multi-size plates according to claim 1, characterized in that, The shelf has a flat surface with an overall length of 6 meters, and its flatness meets the requirement that the difference in diagonal length does not exceed 3mm.

5. A four-section cold press suitable for pressing multi-size plates according to claim 1, characterized in that, The pressure plate assembly is provided with a number of first guide racks equal to the number of hydraulic pressure rods. Each first guide rack is fixed vertically to the upper end of each independent pressure plate and close to the hydraulic pressure rod of the corresponding pressure plate. The frame is provided with a first guide gear that meshes with a first guide rack. The first guide gear is mounted on a transmission shaft extending along the width direction of the frame via bearings.

6. A four-section cold press suitable for pressing multi-size plates according to claim 5, characterized in that, The second and third pressure plates are also provided with second guide racks. Each second guide rack is fixed vertically to the upper end of each independent pressure plate and is located between two first guide racks. The tooth surface orientation of each second guide rack is perpendicular to the tooth surface orientation of each second guide rack; the frame is provided with a second guide gear that meshes with the second guide rack, and the second guide gear is mounted on a transmission shaft extending along the length direction of the frame through a bearing.

7. A four-section cold press suitable for pressing multi-size plates according to claim 1, characterized in that, The hydraulic drive device includes a hydraulic pump station located on the top of the frame. The hydraulic pump station is connected to the hydraulic pressure rods corresponding to each section of the pressure plate through an independent hydraulic control unit. The hydraulic control unit is configured as an independently operable solenoid valve.

8. A four-section cold press suitable for pressing multi-size plates according to claim 1, characterized in that, The frame includes multiple support columns arranged around the perimeter of the platform. Each support column has a cross-section of a square steel pipe of 200mm×200mm or more, and the total height of the support columns is less than 2500mm.

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