Hot press for wood board

Abstract

The utility model discloses a hot press for wood boards. The hot press comprises a base, a hydraulic assembly and an autoclaving assembly. The base comprises a base, a mounting plate and a baffle, wherein the mounting plate and the baffle are perpendicularly fixed to the top of the base. The base, the mounting plate and the baffle form a U-shaped structure. The hydraulic assembly comprises a hydraulic cylinder and an extrusion plate, the hydraulic cylinder is fixed to the baffle, and the extrusion plate is fixedly installed at the output end of the hydraulic cylinder. The pressure steaming assembly comprises a plurality of pressure steaming plates arranged at intervals in the length direction of the base, the pressure steaming plates are arranged in a hot pressing space formed between the mounting plate and the baffle in parallel, and the plate face of each pressure steaming plate is parallel to the pressed plane of the extrusion plate and the inner side plane of the baffle. According to the hot press, through the design of the vertical stacked hot pressing space, the hydraulic pressure conduction direction is consistent with the gravity, the interlayer pressure difference caused by the gravity of traditional horizontal equipment is eliminated, it is ensured that all layers of wood boards are evenly pressed, and the problems that the moisture content distribution is uneven, gluing cracks and finished product warping are effectively solved.

Description

Technical Field

[0001] This application relates to the field of wood processing equipment technology, and more specifically, to a hot press for wood panels. Background Technology

[0002] Traditional hot presses for wood panels typically employ a horizontal, multi-layered structure, applying pressure to the wood through horizontally stacked pressure plates. However, this structure results in significantly greater pressure at the bottom of the panel compared to the top due to gravity (measured pressure difference reaches 15-20%), easily leading to uneven moisture content distribution, glue layer cracking, and warping of the finished product. Furthermore, the horizontal arrangement of steam pipes in a horizontal layout easily causes condensation retention, further exacerbating uneven heating of the wood panels. Therefore, there is an urgent need to develop a vertical hot press that achieves uniform pressure transmission by aligning the vertical lamination direction with the direction of gravity, while simultaneously optimizing the steam diffusion path, fundamentally improving the stability of hot pressing quality. Utility Model Content

[0003] This application provides a hot press for wood panels, including a base, a hydraulic assembly, and a steam press assembly. The base includes a substrate and a mounting plate and a baffle vertically fixed to the top of the substrate, forming a U-shaped structure. The hydraulic assembly includes a hydraulic cylinder and a pressing plate. The hydraulic cylinder is fixed to the baffle, and the pressing plate is fixedly installed at the output end of the hydraulic cylinder. The steam press assembly includes a plurality of steam press plates spaced apart along the length of the base. The steam press plates are arranged parallel to each other within the hot press space formed between the mounting plate and the baffle. The surface of each steam press plate is parallel to the pressure plane of the pressing plate and the inner plane of the baffle. The pressure plane of the pressing plate, the inner plane of the baffle, and the surface of each steam press plate are all vertically oriented, collectively forming a stacked hot press space perpendicular to the base plane.

[0004] In some embodiments, a guide rail assembly is provided on the upper surface of the substrate. The guide rail assembly includes a guide rod and a guide seat. The guide rod is fixed to the substrate, and the guide seat is fixed to the bottom end of the autoclave. The guide rod passes through the guide seat to form a sliding fit.

[0005] In some embodiments, the two opposing plates of the guide seat protrude outward to form a sleeve to prevent the autoclave plate from tilting.

[0006] In some embodiments, a guide groove is formed on the upper surface of the substrate, the guide rod is embedded in the guide groove, and the guide seat extends into the guide groove and is slidably connected to the guide rod.

[0007] In some embodiments, the hot-pressing working surface of the autoclave has a guide groove, and the bottom of the guide groove has uniformly distributed steam micropores.

[0008] In some embodiments, the autoclaving assembly further includes a main steam pipe extending along the length of the substrate, the main steam pipe being connected to each of the autoclaving plates via a high-temperature resistant silicone hose, and the main steam pipe being equipped with a pressure regulating valve.

[0009] In some embodiments, the hot press further includes a frame reinforcement assembly for reinforcing the mounting plate and the baffle to prevent damage during extrusion.

[0010] In some embodiments, the frame reinforcement assembly includes two parallel fixed frames and a connecting rod connecting the two fixed frames, with the two fixed frames located on the outer side surfaces of the mounting plate and the baffle, respectively.

[0011] In some embodiments, a slide rail structure is provided on the upper side of one side of the autoclave. The slide rail structure includes a slide rod and a slide seat. The slide rod is fixed to the frame reinforcement assembly, and the slide seat is fixed to the upper side of the autoclave. The slide seat is slidably mounted on the slide rod.

[0012] In some embodiments, a heating plate is provided inside the bottom end of the autoclave for reforming condensate into steam.

[0013] The hot press of this application adopts a vertical stacked hot pressing space design, so that the direction of hydraulic pressure transmission is consistent with gravity, eliminating the 15%-20% interlayer pressure difference caused by gravity in traditional horizontal equipment. This ensures that each layer of the wood board is uniformly pressed, effectively solving the problems of uneven moisture content distribution, glue cracking, and warping of finished products. At the same time, the vertically arranged autoclave plates optimize the steam diffusion path, avoid the phenomenon of condensate retention in the horizontal pipes, and improve the heating uniformity of the wood board. Combined with the synergistic effect of the U-shaped base and vertical structure, a stable hot pressing environment is formed, which significantly improves the stability of hot pressing quality and yield.

[0014] Additional aspects and advantages of embodiments of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of embodiments of this application. Attached Figure Description

[0015] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein:

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0017] Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure of the centerline AA;

[0018] Figure 3This is a schematic diagram of the steam pressure plate.

[0019] Explanation of main component symbols: hot press 100, base 10, base 11, guide groove 111, mounting plate 12, baffle 13, guide rail assembly 14, guide rod 141, guide seat 142, sleeve 143, hydraulic assembly 20, hydraulic cylinder 21, extrusion plate 22, steam press assembly 30, steam press plate 31, guide groove 311, steam micropore 312, heating plate 313, main steam pipe 32, frame reinforcement assembly 40, fixing frame 41, connecting rod 42, slide rail structure 43, slide rod 431, slide seat 432. Detailed Implementation

[0020] The embodiments of this application will be further described below with reference to the accompanying drawings. The same or similar reference numerals in the drawings denote the same or similar elements or elements having the same or similar functions throughout.

[0021] Furthermore, the embodiments of this application described below in conjunction with the accompanying drawings are exemplary and are only used to explain the embodiments of this application, and should not be construed as limiting this application.

[0022] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0023] Please see Figure 1 This application discloses a hot press 100 for wood panels, comprising a base 10, a hydraulic assembly 20, and a pressure steaming assembly 30. The base 10 includes a base 11 and a mounting plate 12 and a baffle 13 vertically fixed to the top of the base 11, forming a U-shaped structure. The hydraulic assembly 20 includes a hydraulic cylinder 21 and a pressing plate 22. The hydraulic cylinder 21 is fixed to the baffle 13, and the pressing plate 22 is fixedly installed at the output end of the hydraulic cylinder 21. The pressure steaming assembly 30 includes a plurality of steaming plates 31 spaced apart along the length of the base 10. The steaming plates 31 are arranged parallel to each other within the hot pressing space formed between the mounting plate 12 and the baffle 13, with the surface of each steaming plate 31 parallel to the pressure-bearing plane of the pressing plate 22 and the inner plane of the baffle 13. The pressure-bearing plane of the extrusion plate 22, the inner plane of the baffle 13, and the plate surface of each autoclave plate 31 are all arranged vertically, forming a stacked hot-pressing space perpendicular to the plane of the base 11.

[0024] The hot press 100 of this application adopts a vertical stacked hot pressing space design, so that the direction of hydraulic pressure transmission is consistent with gravity, eliminating the 15%-20% interlayer pressure difference caused by gravity in traditional horizontal equipment, ensuring that each layer of the wood board is uniformly pressed, and effectively solving the problems of uneven moisture content distribution, glue cracking and finished product warping. At the same time, the vertically arranged autoclave plates 31 optimize the steam diffusion path, avoid the phenomenon of condensate retention in the horizontal pipes, and improve the heating uniformity of the wood board. Combined with the synergistic effect of the U-shaped base 10 and the vertical structure, a stable hot pressing environment is formed, which significantly improves the stability of hot pressing quality and yield.

[0025] Specifically, the base 10 is fixed to the ground and is integrally cast from high-strength alloy steel. The base 10 consists of three parts: a base 11, a mounting plate 12, and a baffle 13, forming an integral U-shaped frame structure. The mounting plate 12 and the baffle 13 are fixed perpendicular to the top of the base 11 and are symmetrically arranged on both sides of the base 11. The baffle 13 and the base 11 are integrally formed, while the mounting plate 12 is detachably connected to the base 11. The gap between the mounting plate 12 and the baffle 13 forms a hot-pressing space.

[0026] The hydraulic assembly 20 includes a hydraulic cylinder 21 and a pressing plate 22. The hydraulic cylinder 21 is fixed to the outside of the mounting plate 12, and its output shaft passes through the mounting plate 12 and extends into the hot pressing space. The pressing plate 22 is a rectangular metal plate with a surface covered with a high-temperature resistant elastic material layer, and is connected to the flange at the end of the output shaft of the hydraulic cylinder 21 by high-strength bolts.

[0027] The autoclaving assembly 30 consists of several autoclave plates 31, arranged vertically at equal intervals along the length of the base 10 within the hot-pressing space. Each autoclave plate 31 is a hollow composite structure plate with steam micropores 312 on its surface, connected to the main steam channel in the center of the autoclave plate 31. The pore size of the steam micropores 312 is optimized through fluid dynamics simulation to ensure the uniformity of the steam permeation rate. An electric heating element (not shown) is embedded inside the autoclave plate 31, using a thin-film heating element conformally bonded to the plate body. Precise temperature control of the plate surface is achieved through a PID controller.

[0028] Furthermore, to facilitate the compression of the wood by the autoclave plate 31, a guide rail assembly 14 is provided on the upper surface of the base 11. There are two sets of guide rail assemblies 14, which enable stable movement of the autoclave plate 31 and improve positioning accuracy. Specifically, the bottom of the autoclave plate 31 abuts against the upper surface of the base 10. A guide groove 111, approximately U-shaped, is formed on the upper surface of the base 11. The guide rail assembly 14 includes a guide rod 141 and a guide seat 142. The guide rod 141 is fixed in the guide groove 111 of the base 11 via a flange structure. The guide seat 142 is fixed to the bottom end of the autoclave plate 31, or in other words, the bottom of the autoclave plate 31 extends downward to form a lug, i.e., the guide seat 142. The guide rod 141 passes through the guide seat 142 to form a sliding fit, and the lug extends into the guide groove 111 and slides with the guide rod 141. This ensures that the autoclave plate 31 slides on the base 10.

[0029] Furthermore, to prevent the autoclave 31 from tilting towards the two plate surfaces, the two opposite plate surfaces of the guide seat 142 protrude outward to form a sleeve 143, which is used to prevent the autoclave 31 from tilting. The sleeve 143 can effectively resist lateral load force, control the tilt angle of the autoclave 31 within 0.3°, and avoid unilateral wear of the guide rod 141.

[0030] Furthermore, the autoclave 311 has guide grooves 311 formed on its hot-pressing surface. The bottom of each guide groove 311 has uniformly distributed steam micropores 312. The guide grooves 311 are radially distributed, and their ends are connected to an annular steam pressure stabilizing chamber. The diameter of the guide grooves 311 is 1.0-1.3 times the diameter of the steam micropores 312. The radial layout of the guide grooves 311 optimizes the steam diffusion path and achieves high steam coverage on the plate surface. It should be noted that the number of steam micropores 312 shown in the figure is not the actual number and can be adjusted as needed. In one embodiment, the diameter of the steam micropores is 0.5 ± 0.02 mm, and the pore density is 25 pores / cm².

[0031] Furthermore, due to the influence of temperature difference during the pressing process of the autoclave 31, water vapor easily forms condensate and accumulates at the bottom of the autoclave 31. A heating plate 313 is provided inside the bottom of the autoclave 31 to regenerate the condensate into steam and improve the autoclaving efficiency.

[0032] Furthermore, the autoclaving assembly 30 also includes a main steam pipe 32 extending along the length of the base 11. The main steam pipe 32 is fixed to the frame reinforcement assembly 40 and located on the side opposite to the discharge direction. The main steam pipe 32 is connected to each autoclave plate 31 through a high-temperature resistant silicone hose. A pressure regulating valve (not shown) is provided on the main steam pipe 32. The modular quick-change pipeline design enables quick disassembly and assembly of the autoclave plates 31, improving maintenance efficiency.

[0033] Furthermore, the hot press 100 also includes a frame reinforcement assembly 40, which is used to reinforce the mounting plate 12 and the baffle 13 to prevent damage during extrusion. Specifically, the frame reinforcement assembly 40 includes two parallel fixing frames 41 and a connecting rod 42 connecting the two fixing frames 41. The two fixing frames 41 are located on the outer surfaces of the mounting plate 12 and the baffle 13, respectively. The fixing frames 41 are roughly in the shape of a "well" and are fixed to the ground at the bottom. The fixing frames 41 are connected to the mounting plate 12 and the baffle 13 by welding or bolts to enhance the stability of the overall structure. The connecting rod 42 is located between the mounting plate 12 and the baffle 13, and its two ends are fixed to the fixing frames 41 by screws.

[0034] Furthermore, a slide rail structure 43 is provided on the upper side of one side of the autoclave 31. The slide rail structure 43 includes a slide rod 431 and a slide seat 432. The slide rod 431 is fixed to the frame reinforcement component 40, and the slide seat 432 is fixed to the upper side of the autoclave 31. The slide seat 432 is slidably mounted on the slide rod 431 and is provided with a steam inlet communicating with the main steam pipe 32. The slide rail structure 43 further enhances the stability of the autoclave 31 in the horizontal direction.

[0035] In the description of this specification, the references to "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" refer to specific features, structures, materials, or characteristics described in connection with the described embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the stated features. In the description of this application, "multiple" means at least two, such as two or three, unless otherwise explicitly specified.

[0037] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A hot press for wood panels, characterized in that, include: The base includes a base and a mounting plate and a baffle that are vertically fixed to the top of the base, the base, the mounting plate and the baffle forming a U-shaped structure; A hydraulic assembly, comprising a hydraulic cylinder and an extrusion plate, wherein the hydraulic cylinder is fixed to the baffle plate and the extrusion plate is fixedly installed at the output end of the hydraulic cylinder; The autoclaving assembly includes a plurality of autoclaving plates arranged at intervals along the length of the base. The autoclaving plates are arranged parallel to each other in the hot pressing space formed between the mounting plate and the baffle. The surface of each autoclaving plate is parallel to the pressure plane of the extrusion plate and the inner side plane of the baffle, respectively. The pressing plane of the extrusion plate, the inner plane of the baffle, and the surface of each autoclave are all arranged vertically, together forming a stacked hot-pressing space perpendicular to the base plane.

2. The hot press according to claim 1, characterized in that, A guide rail assembly is provided on the upper surface of the substrate. The guide rail assembly includes a guide rod and a guide seat. The guide rod is fixed to the substrate, and the guide seat is fixed to the bottom end of the autoclave. The guide rod passes through the guide seat to form a sliding fit.

3. The hot press according to claim 2, characterized in that, The two opposing plates of the guide seat protrude outward to form a sleeve, which is used to prevent the autoclave plate from tilting.

4. The hot press according to claim 2, characterized in that, The upper surface of the base is provided with a guide groove, the guide rod is embedded in the guide groove, and the guide seat extends into the guide groove and is slidably connected with the guide rod.

5. The hot press according to claim 4, characterized in that, The steam guide groove is opened on the hot pressing working surface of the autoclave, and the bottom of the steam guide groove is provided with uniformly distributed steam micropores.

6. The hot press according to claim 1, characterized in that, The autoclaving assembly also includes a main steam pipe extending along the length of the base. The main steam pipe is connected to each of the autoclaving plates via a high-temperature resistant silicone hose, and a pressure regulating valve is provided on the main steam pipe.

7. The hot press according to claim 1, characterized in that, The hot press also includes a frame reinforcement assembly for reinforcing the mounting plate and the baffle to prevent damage during extrusion.

8. The hot press according to claim 7, characterized in that, The frame reinforcement assembly includes two parallel fixed frames and a connecting rod connecting the two fixed frames. The two fixed frames are respectively located on the outer side of the mounting plate and the baffle.

9. The hot press according to claim 8, characterized in that, A slide rail structure is provided on the upper side of one side of the autoclave. The slide rail structure includes a slide rod and a slide seat. The slide rod is fixed to the frame reinforcement component, and the slide seat is fixed to the upper side of the autoclave. The slide seat is slidably mounted on the slide rod.

10. The hot press according to claim 1, characterized in that, A heating plate is installed inside the bottom end of the autoclave to regenerate condensate into steam.

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