Hot pressing device for circle assembly of environment-friendly plywood and plywood cylinder structure

Abstract

The invention relates to the technical field of plywood rounding, and particularly discloses a hot pressing device for environment-friendly plywood rounding and a plywood cylinder structure. The device aims at overcoming the defects that an existing device extrudes plywood through a fixing die, so that pressure borne by part of the plywood is large, and indentations are prone to being generated. Comprising a machine frame, the machine frame is fixedly connected with a supporting plate, the lower portion of the machine frame is fixedly connected with two sets of first hydraulic push rods which are symmetrically distributed, each set comprises the first hydraulic push rods which are evenly distributed, the telescopic ends of the first hydraulic push rods are fixedly connected with a fixing frame, and the upper side of the fixing plate is fixedly connected with a lower mold. The fixing frames are connected with sliding frames in a sliding mode, the sliding frames in the same group are jointly and fixedly connected with a fixing shaft, and an extrusion roller is fixedly connected to the outside of the fixing shaft. According to the plywood extrusion device, the extrusion rollers and parts on the extrusion rollers move along a fixed path to extrude the plywood, so that the continuity and uniformity of stress of all parts of the plywood are guaranteed, and the situation that indentations are generated due to uneven stress of the plywood is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of plywood round assembly, and in particular discloses a hot pressing device for environmentally friendly plywood round assembly and a plywood cylinder structure. Background Art

[0002] Plywood rounding refers to the use of hot pressing devices to form a complete plywood from multiple originally straight plywood substrates through heating, humidification, gluing and pressing, and gradually hot pressing the plywood into a cylindrical shape (or curved shape). Because the hot pressing process is an integrated forming process, the cylindrical surface of the plywood after rounding is smooth and beautiful, which has good economic benefits and development prospects. Existing hot pressing devices usually directly extrude the heated and humidified plywood in sequence through multiple molds less than 180° to extrude the plywood substrate into a round shape, while using molds to directly When the plywood substrate is extruded, the two ends of the mold will first contact the plywood substrate, which will cause the pressure on the plywood substrate at the contact points with the two ends of the mold to be greater than the pressure on the points not squeezed by the mold during the compression and deformation process. The heated and humidified board has greater plasticity. Therefore, when the mold is extruding the plywood substrate, part of the plywood substrate is subjected to excessive pressure, resulting in indentations on the plywood at that location, which in turn affects the smoothness of the surface of the plywood after forming, resulting in the composed plywood cylinder being not beautiful enough. Summary of the invention

[0003] In order to overcome the disadvantage that the existing device extrude the plywood through a fixed mold, resulting in greater pressure on some parts of the plywood and easy to produce indentations, the present invention provides an environmentally friendly plywood round assembly hot pressing device and a plywood cylinder structure.

[0004] The technical implementation scheme of the present invention is: a hot pressing device for assembling environmentally friendly plywood into a circle, comprising a frame, the frame is fixedly connected to a support plate, the support plate is equipped with an electric rotating shaft, the outer side of the electric rotating shaft is fixedly connected to a fixed roller, the lower part of the frame is fixedly connected to two symmetrically distributed groups of first hydraulic push rods, each group includes evenly distributed first hydraulic push rods, the telescopic ends of all the first hydraulic push rods are slidably connected to the fixed plate, the telescopic ends of the first hydraulic push rods are fixedly connected to a fixed frame, a tension spring is installed between the fixed frame and the fixed plate, a lower mold is fixedly connected to the upper side of the fixed plate, the fixed frame is slidably connected to a sliding frame, the sliding frames on the same group of the first hydraulic push rods are commonly fixed with an extrusion roller, the support plate is fixedly connected to a fixed slide rail slidably connected to the adjacent sliding frame, and an extrusion mechanism for extruding the upper part of the plywood is provided on the upper side of the frame.

[0005] More preferably, the extrusion mechanism includes two symmetrically distributed groups of second hydraulic push rods, each group includes evenly distributed second hydraulic push rods, the telescopic ends of the second hydraulic push rods in the same group are commonly fixed to an upper mold, the lower mold and the symmetrically distributed upper mold together form a complete circle, and the lower mold and the symmetrically distributed upper mold are commonly provided with an expansion component for changing their respective thicknesses.

[0006] More preferably, a symmetrically distributed clamping frame is fixedly connected to one side of the frame away from the support plate, and the clamping frame is equipped with symmetrically distributed fixed jaws. The clamping frame on one side is equipped with symmetrically distributed upper rotating slide rails through the fixed jaws thereon, and the clamping frame on the other side is equipped with symmetrically distributed lower rotating slide rails through the fixed jaws thereon, and the upper rotating slide rails are rotatably connected to the adjacent lower rotating slide rails, and the upper rotating slide rails and the adjacent lower rotating slide rails form a slide rail with the same structure as the adjacent fixed slide rails.

[0007] More preferably, the fixed slide rail is provided with an arc-shaped slide groove and symmetrically distributed vertical slide grooves, the vertical slide grooves are connected with adjacent arc-shaped slide grooves, and the length of the vertical slide grooves is greater than the thickness of the upper mold.

[0008] More preferably, the expansion component includes a first lower expansion mold, the first lower expansion mold is arranged in the lower mold, the first lower expansion mold is provided with a second lower expansion mold, the upper mold is provided with a first upper expansion mold, the first upper expansion mold is provided with a second upper expansion mold, the first lower expansion mold, the second lower expansion mold, the symmetrically distributed first upper expansion mold and the symmetrically distributed second upper expansion mold are all fixed with symmetrical and evenly distributed fixing parts, the first lower expansion mold is connected to the lower mold by bolts through the fixing parts thereon, the second lower expansion mold is connected to the first lower expansion mold by bolts through the fixing parts thereon, the first upper expansion mold is connected to the adjacent upper mold by bolts through the fixing parts thereon, and the second upper expansion mold is connected to the adjacent first upper expansion mold by bolts through the fixing parts thereon.

[0009] More preferably, the outer side of the extrusion roller is rotatably connected to a first extrusion member, the outer side of the first extrusion member is rotatably connected to a second extrusion member, the first extrusion member and the second extrusion member are both fixedly connected to connecting members, the first extrusion member is bolted to the adjacent extrusion roller via the connecting member thereon, and the second extrusion member is bolted to the adjacent first extrusion member via the connecting member thereon.

[0010] More preferably, the cross-sections of the first extrusion member and the second extrusion member are both C-shaped, and the angles of the outer arc segments of the first extrusion member and the outer arc segments of the second extrusion member are both greater than 180°, and the angles of the inner arc segments of the first extrusion member and the inner arc segments of the second extrusion member are both less than or equal to 180°.

[0011] More preferably, a third hydraulic push rod is fixedly connected to the upper side of the frame, a spray head is fixedly connected to the telescopic end of the third hydraulic push rod, and the spray head is located directly above the fixed roller.

[0012] More preferably, the lower mold, the upper mold, the first lower expansion mold, the second lower expansion mold, the symmetrically distributed first upper expansion mold and the symmetrically distributed second upper expansion mold are all provided with heating chambers, the lower mold, the upper mold, the symmetrically distributed first lower expansion mold and the symmetrically distributed first upper expansion mold are all fixedly connected with male joints connected with the heating chambers therein, the male joints are provided with first interfaces and second interfaces, the male joints are slidably connected with male card valves, and a tension spring is installed between the two, the first interface and the second interface are both sealed with the adjacent male card valves, The second lower expansion mold, the second upper expansion mold, the male connector on the first lower expansion mold and the male connector on the first upper expansion mold are all fixedly connected through a hose and connected to a female connector, a female clamping valve is slidably connected inside the female connector, and a tension spring is fixedly connected between the two, the female connector is sealed and limitedly matched with the adjacent female clamping valve, the female clamping valve is extrusion-matched with the adjacent male clamping valve, a sleeve is slidably connected outside the female connector, and a spring is fixedly connected between the two, a limiting ball is slidably connected inside the female connector, the limiting ball is limitedly matched with the adjacent sleeve, and the upper limiting ball of the female connector is limitedly matched with the adjacent male connector.

[0013] More preferably, an environmentally friendly plywood cylindrical structure includes an outer plywood, an inner plywood and a double-sided glued veneer, wherein the outer plywood, the double-sided glued veneer and the inner plywood are all cylindrical structures with successively decreasing diameters, the arc between the outer plywood cylindrical interface and the inner plywood cylindrical interface is 180°, and the outer plywood cylindrical interface, the double-sided glued veneer cylindrical interface and the inner plywood cylindrical interface are staggered in pairs.

[0014] Compared with the prior art, the present invention has the following advantages: the present invention extrude the plywood by moving the extrusion roller and its components along a fixed path, thereby ensuring the continuity and uniformity of the force applied to each part of the plywood and reducing the situation where the plywood is indented due to uneven force.

[0015] The present invention changes the number of parts installed on the lower mold, the extrusion roller and the upper mold through expansion components, and changes the inner diameter of the extruded plywood parts, so that the device can extrude multiple plywoods in sequence during the hot pressing process, thereby enabling the device to support more abundant plywood assembly solutions and increasing the application range of the device.

[0016] The present invention improves the utilization rate of heat resources to the maximum extent by heating only the parts that are bonded to the plywood, thereby increasing the energy utilization efficiency of the device and the heating effect on the plywood.

[0017] The present invention makes the interfaces of the outer plywood cylinder, the double-sided glued single board cylinder and the inner plywood cylinder staggered so that the three are adhered and restrained to each other, thereby increasing the firmness of the cylinder composed of the three after being pressed together and reducing the probability of the plywood cylinder collapsing outwards along the cylinder interface during subsequent use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the frame, the support plate and the fixed roller of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the support plate, the electric rotating shaft and the fixed roller of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the first hydraulic push rod, the fixing plate and the fixing frame of the present invention; Figure 5 A detailed illustration of the extrusion roller and the first extrusion member of the slide frame of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the frame, support plate and fixed slide rail of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the clamping frame, the upper rotating slide rail and the lower rotating slide rail of the present invention; Figure 8 A detailed illustration of the clamping frame, the fixed clamping jaws and the upper rotating slide rail of the present invention; Fig. 9 It is a cross-sectional view of the lower mold, the first lower expansion mold and the second lower expansion mold of the present invention; Fig.10 It is a cross-sectional view of the upper mold, the first upper expansion mold and the second upper expansion mold of the present invention; Fig.11 It is a cross-sectional view of the upper mold, the male connector and the female connector of the present invention; Fig.12 Detailed illustration of the male connector, male valve and female connector of the present invention; Fig.13 It is a schematic diagram of the three-dimensional structure of the outer plywood, the inner plywood and the double-sided glue-coated veneer of the present invention.

[0019] The markings of the components in the attached drawings are as follows: 1. frame, 2. support plate, 3. electric shaft, 4. fixed roller, 5. first hydraulic push rod, 6. fixed plate, 7. fixed frame, 8. tension spring, 9. lower mold, 10. sliding frame, 13. extrusion roller, 14. fixed slide rail, 15. second hydraulic push rod, 16. upper mold, 17. clamping frame, 18. fixed clamping claw, 19. upper rotating slide rail, 20. lower rotating slide rail, 21. first lower expansion mold, 22. Second lower expansion mold, 23, first upper expansion mold, 24, second upper expansion mold, 25, fixing part, 26, first extrusion part, 27, second extrusion part, 271, connecting part, 28, third hydraulic push rod, 29, sprinkler head, 30, male connector, 301, first interface, 302, second interface, 31, male valve, 32, female connector, 33, female valve, 34, sleeve, 35, outer plywood, 36, inner plywood, 37, double-sided glued veneer. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Embodiment 1: Because existing devices all use fixed molds to extrude the plywood substrate, when the fixed mold contacts the plywood substrate, the mold can only extrude the plywood through its two ends first, causing the two ends of the plywood to be subjected to greater force, while the middle part is subjected to less force. When the plywood is subjected to uneven force, the deformation amounts produced in different parts are also different. If the humidity of the plywood is too high during the steaming process, it is easy to produce plastic indentations due to excessive pressure, causing indentations on the surface of the plywood when it is formed into a round shape, affecting the smoothness of the plywood surface.

[0022] In view of the above problems, a hot pressing device for round assembly of environmentally friendly plywood is proposed. Figure 1-Figure 5As shown, it includes a frame 1, a control terminal is fixedly connected to the outside of the frame 1, a support plate 2 is fixedly connected to the rear side of the frame 1, an electric shaft 3 electrically connected to the control terminal is installed on the front side of the support plate 2, a fixed roller 4 is fixedly connected to the outer side of the electric shaft 3, the electric shaft 3 drives the fixed roller 4 to rotate, and drives the hot-pressed plywood thereon to rotate, thereby forming more plywood combination schemes, the lower part of the frame 1 is fixedly connected to two groups of first hydraulic push rods 5 symmetrically distributed on the left and right and electrically connected to the control terminal, each group includes two first hydraulic push rods 5 evenly distributed front and back, the telescopic ends of all the first hydraulic push rods 5 are slidably connected to a fixed plate 6 together, the telescopic ends of the first hydraulic push rods 5 are fixedly connected to a fixed frame 7, a tension spring 8 is installed between the fixed frame 7 and the fixed plate 6, the fixed frame 7 pulls the fixed plate 6 to move along with the telescopic end of the first hydraulic push rod 5 through the tension spring 8, and the upper portion of the fixed plate 6 The lower side is fixed with a lower mold 9, which squeezes adjacent plywood to keep the adjacent plywood in an arc shape, thereby assisting the plywood in shaping. The fixed frame 7 is horizontally slidably connected with a sliding frame 10. The sliding frames 10 of the two first hydraulic push rods 5 in the same group are commonly fixed with an extrusion roller 13. The extrusion roller 13 is used to extrude the plywood to deform, and because the movement trajectory of the extrusion roller 13 is fixed, the extrusion force applied by the extrusion roller 13 to the plywood remains unchanged. The support plate 2 is fixed with a fixed slide rail 14, and the fixed slide rail 14 is provided with an arc-shaped slide groove and two vertical slide grooves symmetrically distributed up and down (the arc-shaped slide groove and the two vertical slide grooves are collectively referred to as slide grooves), and the vertical slide grooves are connected with adjacent arc-shaped slide grooves. The fixed slide rail 14 is slidably connected with the adjacent sliding frame 10 through its upper slide groove. An extrusion mechanism for extruding the upper part of the plywood is provided on the upper side of the frame 1, and the extrusion mechanism is electrically connected to the control terminal.

[0023] Reference Figure 2 and Figure 3 As shown, the extrusion mechanism includes two groups of second hydraulic push rods 15 which are symmetrically distributed on the left and right and are electrically connected to the control terminal. Each group includes two second hydraulic push rods 15 which are evenly distributed front and back. The telescopic ends of the two second hydraulic push rods 15 in the same group are commonly fixed with an upper mold 16. The two upper molds 16 cooperate with each other to extrude the plywood to bend to the upper position. The length of the vertical slide groove is greater than the thickness of the upper mold 16. The lower mold 9 and the upper molds 16 which are symmetrically distributed on the left and right form a complete circle. The three cooperate with each other to limit the plywood extruded into a circle, waiting for the plywood to be dried and shaped. The lower mold 9 and the two upper molds 16 are commonly provided with an expansion component for changing their respective thicknesses.

[0024] Reference Figure 6-Figure 8As shown, two clamping frames 17 symmetrically distributed in the upper and lower directions are fixedly connected to the front side of the frame 1. The clamping frames 17 are equipped with two fixed jaws 18 symmetrically distributed and electrically connected to the control terminal. The fixed jaws 18 are existing devices used to clamp adjacent parts. The upper clamping frame 17 is equipped with two upper rotating slide rails 19 symmetrically distributed in the left and right directions through the fixed jaws 18 on it. The lower clamping frame 17 is equipped with two lower rotating slide rails 20 symmetrically distributed in the left and right directions through the fixed jaws 18 on it. The upper rotating slide rail 19 is rotatably connected to the adjacent lower rotating slide rail 20. The upper rotating slide rail 19 and the adjacent lower rotating slide rail 20 form a slide rail with the same structure as the adjacent fixed slide rail 14, and jointly guide the adjacent sliding frames 10 and the adjacent squeezing rollers 13 to ensure that the squeezing rollers 13 apply uniform pressure to the plywood.

[0025] Reference Figure 6-Figure 8 As shown, the expansion component includes a first lower expansion mold 21, the first lower expansion mold 21 is arranged in the lower mold 9, the first lower expansion mold 21 is provided with a second lower expansion mold 22, the upper mold 16 is provided with a first upper expansion mold 23, the first upper expansion mold 23 is provided with a second upper expansion mold 24, the first lower expansion mold 21, the second lower expansion mold 22, the symmetrically distributed first upper expansion mold 23 and the symmetrically distributed second upper expansion mold 24 are all fixedly connected with two groups of fixing members 25 symmetrically distributed front and back, each group includes two fixing members 25 evenly distributed left and right, and the fixing members 25 are provided with reinforcing ribs for stably increasing the connection strength between the connected parts, the first lower expansion mold 21 is connected to the lower mold 9 by bolts through the upper fixing members 25, the second lower expansion mold 22 is connected to the first lower expansion mold 21 by bolts through the upper fixing members 25, the first upper expansion mold 23 is connected to the adjacent upper mold 16 by bolts through the upper fixing members 25, and the second upper expansion mold 24 is connected to the adjacent first upper expansion mold 23 by bolts through the upper fixing members 25.

[0026] Reference Figure 5As shown, the outer side of the squeezing roller 13 is detachably rotatably connected to a first squeezing member 26, and the outer side of the first squeezing member 26 is detachably rotatably connected to a second squeezing member 27. The cross-sections of the first squeezing member 26 and the second squeezing member 27 are both C-shaped, and the angles of the outer arc sections of the first squeezing member 26 and the outer arc sections of the second squeezing member 27 are both greater than 180°, which is used to ensure that the squeezing position of the plywood is a standard arc shape, thereby ensuring that the plywood is subjected to uniform squeezing force at all locations, and the angles of the inner arc sections of the first squeezing member 26 and the inner arc sections of the second squeezing member 27 are both less than 180°. The angle of the first extrusion member 26 and the second extrusion member 27 is equal to or greater than 180°, which is convenient for disassembly of the two. The first extrusion member 26 and the second extrusion member 27 are both fixedly connected with a connecting member 271 (the connecting member 271 has a similar principle and function to the fixing member 25 and is used to fix two adjacent components). The first extrusion member 26 is bolted to the adjacent extrusion roller 13 via the connecting member 271 thereon, and the second extrusion member 27 is bolted to the adjacent first extrusion member 26 via the connecting member 271 thereon. Because the fixing member 25 and the connecting member 271 are connected to the adjacent components via bolts, they are easy to disassemble. Therefore, this connection method is more convenient.

[0027] Reference Figure 2 and Figure 3 As shown, a third hydraulic push rod 28 electrically connected to the control terminal is fixedly connected to the upper side of the frame 1, and a spray head 29 is fixedly connected to the telescopic end of the third hydraulic push rod 28. The spray head 29 is an existing device, which is connected to an external glue supply device and is used to drip glue to the plywood below it to facilitate the bonding between the two plywood boards. The spray head 29 is located directly above the fixed roller 4.

[0028] Reference Figure 9-12 As shown, the lower mold 9, the upper mold 16, the first lower expansion mold 21, the second lower expansion mold 22, the symmetrically distributed first upper expansion mold 23 and the symmetrically distributed second upper expansion mold 24 are all provided with a heating cavity (such as Fig. 9 and Fig.10As shown in the figure, the lower mold 9, the upper mold 16, the symmetrically distributed first lower expansion mold 21 and the symmetrically distributed first upper expansion mold 23 are all fixedly connected with a male connector 30 connected to the heating cavity therein, and the male connectors 30 on the front side of the lower mold 9 and the front side of the upper mold 16 are connected to an external heating device through a hose. The heating device is an existing device, which is used to inject hot water into the male connector 30 of the lower mold 9, and the male connectors 30 on the rear side of the lower mold 9 and the rear side of the upper mold 16 are used to return the hot water to the heating device, so as to promote the circulation of the hot water, thereby The plywood is heated and dried, and a first interface 301 and a second interface 302 are arranged in the male connector 30. The first interface 301 is located on a side of the male connector 30 close to an adjacent heating chamber, and the second interface 302 is located on a side of the male connector 30 away from an adjacent heating chamber. A male valve 31 is slidably connected in the male connector 30, and a tension spring is installed between the two, and the tension spring is initially in a power storage state. The male valve 31 seals with the adjacent first interface 301 to prevent hot water from flowing into the adjacent heating chamber. The male valve 31 seals with the adjacent second interface 301 to prevent hot water from flowing into the adjacent heating chamber. The second lower expansion mold 22, the second upper expansion mold 24, the male connector 30 on the first lower expansion mold 21 and the male connector 30 on the first upper expansion mold 23 are all fixedly connected and connected to the female connector 32 through a hose. The principle of the cooperation between the female connector 32 and its components and the adjacent male connector 30 can refer to the quick connector device of the existing water pipe. A female valve 33 is slidably connected in the female connector 32, and a tension spring is fixedly connected between the two, and the initial state of the tension spring is a stored force state. The clamping valve 33 is sealed and limitedly matched with the adjacent female joint 32 to prevent water from spraying outward from the female joint 32. The female clamping valve 33 is squeezed and matched with the adjacent male clamping valve 31 to push the adjacent male clamping valve 31 to move. The female joint 32 is slidably connected to the outside with a sleeve 34, and a spring is fixed between the two. The female joint 32 is slidably connected to a limiting ball, and the limiting ball is limitedly matched with the adjacent sleeve 34. The limiting ball of the female joint 32 is limitedly matched with the adjacent male joint 30. The limiting method here is consistent with the limiting principle of the existing quick connector device of the water pipe.

[0029] When the staff performs hot-pressing and assembling of the sheets used for producing plywood, they first place the sheets of plywood into a steam device for heating and steaming, then assemble the sheets of plywood up and down in the order of gluing, and evenly apply glue to the sheets of plywood. The staff closes the two fixed jaws 18 on the lower clamping frame 17 through the control terminal, so that the two fixed jaws 18 release the clamping of the lower rotating slide rail 20. At this time, the staff rotates the lower rotating slide rail 20 upward along the upper rotating slide rail 19 to expose the space in front of the second extrusion member 27. Finally, the staff lifts the assembled plywood to the upper side of the two second extrusion members 27, and ensures that the center line of the plywood is located directly below the fixed roller 4. The staff then rotates and resets the lower rotating slide rail 20, and controls the two fixed jaws 18 through the control terminal to re-clamp the lower rotating slide rail 20, preparing to perform hot-pressing and assembling of the plywood.

[0030] When the staff is hot-pressing the plywood, they first control the telescopic ends of the four first hydraulic push rods 5 to extend upward together through the control terminal. The telescopic ends of the first hydraulic push rods 5 drive the adjacent sliding frames 10 to move upward together through the adjacent fixed frames 7. The sliding frames 10 drive the adjacent extrusion rollers 13, the adjacent first extrusion pieces 26 and the adjacent second extrusion pieces 27 to move upward together. The sliding frames 10 slide upward along the vertical slide grooves on the lower sides of the adjacent fixed slide rails 14 until the plywood contacts the fixed rollers 4. At this time, the second extrusion pieces 27 and other components drive the plywood to move upward together. During the upward movement, the plywood is squeezed by the fixed roller 4 and cannot continue to move upward. The sliding frame 10 just moves to the point where it contacts the arc-shaped slide groove of the adjacent fixed slide rail 14. Then, the sliding frame 10 moves along the arc-shaped slide groove of the adjacent fixed slide rail 14 while driving the components thereon to move upward. The second extrusion component 27 and other components gradually squeeze the plywood upward along the track of the slide groove of the adjacent fixed slide rail 14, causing the plywood to be squeezed by the fixed roller 4 and the two second extrusion components 27 moving upward at the same time, and gradually bend upward into an arc shape that always fits the fixed roller 4 on top.

[0031] In the above process, because the pressure applied by the second extrusion member 27 to the plywood is always related to the distance between the second extrusion member 27 and the fixed roller 4, and the movement trajectory of the second extrusion member 27 is determined by the slide groove of the fixed slide rail 14, the distance between the second extrusion member 27 and the fixed roller 4 is always equal to a constant value, the pressure applied by the second extrusion member 27 to the plywood is relatively constant, avoiding the problem that the pressure on both sides of the plywood is greater than the pressure at other positions, and the pressure on the plywood is uneven during the pressing process.

[0032] When the telescopic end of the first hydraulic push rod 5 drives the adjacent fixed frame 7 to move upward, the four first hydraulic push rods 5 synchronously drive the fixed plate 6 and other parts to move upward through their respective adjacent tension springs 8, and the fixed plate 6 drives the lower mold 9 and the parts thereon to move upward together, and the lower mold 9 gradually approaches the plywood. When the second extrusion member 27 moves to the farthest point on both sides of the fixed roller 4, the sliding frame 10 begins to slide along the arc-shaped slide groove on the upper part of the fixed slide rail 14, and continues to extrude the upper part of the plywood according to the same principle. Subsequently, the lower mold 9 gradually contacts with the plywood during the upward movement and squeezes the lower part of the plywood, so that the lower part of the plywood always remains in contact with the fixed roller 4. Subsequently, the lower mold 9 is limited by the plywood and cannot continue to move upward. The fixed frame 7 is driven by the telescopic end of the first hydraulic push rod 5 to continue to move upward, and the tension spring 8 is stretched to store force.

[0033] When the two second extrusion members 27 move to the upper side of the plywood and the two second extrusion members 27 contact each other, the sliding frame 10 is located at the intersection of the arc-shaped slide groove of the fixed slide rail 14 and the upper vertical slide groove. The plywood is squeezed by the two second extrusion members 27, and each part is subjected to uniform squeezing force to form a basic circle. The control terminal temporarily closes the first hydraulic push rod 5 and starts the second hydraulic push rods 15 on both sides. The telescopic ends of the two second hydraulic push rods 15 extend toward the middle synchronously, and the second hydraulic push rod 15 drives the upper mold 16 thereof to move toward the plywood. When the upper mold 16 moves to the position close to the adjacent second extrusion member 27, the control terminal starts the four first hydraulic push rods 5 again. The telescopic ends of the first hydraulic push rods 5 drive the slides through the adjacent components. The movable frame 10 and the second extrusion member 27 move upward along the vertical slide groove on the upper side of the adjacent fixed slide rail 14. At this time, the second extrusion member 27 no longer extrude the plywood, but the plywood has been initially bent into an arc shape after being extruded by the second extrusion member 27. When the second extrusion member 27 moves to the upper side of the fixed roller 4, the two upper molds 16 gradually move toward the plywood, while first squeezing the plywood on the upper side, pushing the two ends of the upper side of the plywood to move toward the middle. When the two upper molds 16 contact each other, the control terminal closes the second hydraulic push rod 15, and the two upper molds 16 are assembled together and cooperate with the lower mold 9 to form a complete circle, extruding the plywood layer into a cylindrical shape. Then the control terminal controls the upper mold 16 and the lower mold 9 to remain in place, and prepares to heat and dry the plywood.

[0034] The control terminal first controls the heating device to inject hot water into the male connector 30 on the front side of the lower mold 9 and the upper mold 16 through the hose, taking one of the upper molds 16, the adjacent first upper expansion mold 23 and the adjacent second upper expansion mold 24 as examples: at this time, because the male connector 30 on the upper mold 16 is in a connected state with the female connector 32 on the first upper expansion mold 23, the male card valve 31 and the female card valve 33 between the two are squeezed and matched with each other, and the male card valve 31 is squeezed by the adjacent female card valve 33 and sealed with the first interface 301, and the female card valve 33 releases the sealing limit cooperation with the adjacent female connector 32, and the tension springs on the male card valve 31 and the adjacent female card valve 33 are stretched and stored. At this time, the second interface 302 is in an open state, so the hot water injected into the male connector 30 on the upper mold 16 is directly introduced into the hose connected to the adjacent female connector 32, and will not enter the heating cavity on the upper mold 16 , and here the female connector 32 introduces the hot water into the male connector 30 of the first upper expansion mold 23 through the hose. The male connector 30 of the first upper expansion mold 23 and the female connector 32 on the second upper expansion mold 24 are in a connected state. Therefore, by the same token, at this time, the hot water does not enter the heating chamber of the first upper expansion mold 23, but directly enters the heating chamber of the second upper expansion mold 24. The hot water flowing through the heating chamber of the second upper expansion mold 24 heats and dries the plywood. As new hot water is continuously injected into the front side of the heating chamber of the second upper expansion mold 24, the excess hot water that first flows into the heating chamber of the second upper expansion mold 24 gradually flows out through the adjacent hose and female connector 32 on the rear side. The hot water flows out through the male connector 30 on the rear side of the adjacent first upper expansion mold 23, the female connector 32 on the rear side, and the male connector 30 on the rear side of the adjacent upper mold 16, and finally flows back into the heating device.

[0035] When the plywood is dried and shaped, the staff stops injecting hot water into the heating chamber of the second upper expansion mold 24 through the control terminal, and controls the first hydraulic push rod 5 and the second hydraulic push rod 15 to drive the adjacent parts to operate in the reverse direction, thereby controlling the adjacent parts to move and reset.

[0036] When it is necessary to hot-press multiple layers of plywood, the staff controls the electric rotating shaft 3 to drive the fixed roller 4 to rotate to control the position of the hot-pressed plywood joint formed thereon, so as to facilitate hot-pressing other plywood outside the already formed plywood, so that multiple plywood can form a more complete circle. The staff first pulls the sleeve 34 of the female joint 32 on the second lower expansion mold 22 and the second upper expansion mold 24, and the sleeve 34 slides along the adjacent female joint 32. The spring on the sleeve 34 is compressed and stored, and the sleeve 34 releases the limit on the adjacent limit ball, so that the limit ball of the adjacent female joint 32 no longer limits the adjacent male joint 30. The staff releases the limit ball of the adjacent female joint 32. The connector 32 is connected to the adjacent male connector 30, and the male valve 31 and the female valve 33 in the male connector 30 and the female connector 32 are no longer squeezed and matched with each other. At this time, the male valve 31 is away from the first interface 301 under the action of the adjacent tension spring, and the sealing matching relationship with the second interface 302 is restored. The female valve 33 is restored to the sealing limit matching with the adjacent female connector 32 under the action of the adjacent tension spring. When the staff releases the sleeve 34, the sleeve 34 is reset under the action of the adjacent spring and the limit of the adjacent limit ball is restored. At this time, when the plywood is heated and dried, according to the above principle, hot water directly flows into the heating cavity of the first upper expansion mold 23.

[0037] While releasing the connection between the female connector 32 and the adjacent male connector 30, the staff member turns the fixing parts 25 on the second lower extension mold 22 and the second upper extension mold 24 by a wrench, and removes and takes out the second lower extension mold 22 and the second upper extension mold 24 from the first lower extension mold 21 and the first upper extension mold 23 respectively, so as to reserve a distance for pressing the second layer of plywood. At the same time, the staff member releases the connection between the second extrusion member 27 and the first extrusion member 26 by screwing the bolts of the connecting parts 271 on the two second extrusion members 27. Then, the staff member removes the second extrusion member 27 from the first extrusion member 26 by turning the second extrusion member 27. The staff member places the second layer of plywood on the upper side of the two first extrusion members 26, and applies glue on the upper side of the second layer of plywood. The control terminal starts the third hydraulic push rod 28, and the telescopic end of the third hydraulic push rod 28 drives the spray head 29 to move down to the upper side of the plywood cylinder. The staff controls the electric shaft 3 through the remote control device to drive the fixed roller 4 and the plywood cylinder to rotate, and at the same time supplies glue to the spray head 29 through the external glue supply device. The glue flows downward from the spray head 29 to the surface of the plywood cylinder. When the surface of the plywood cylinder and the upper side of the second layer of plywood are covered with glue, the staff turns off the glue supply device and controls the telescopic end of the third hydraulic push rod 28 through the control terminal to drive the adjacent parts to reset. Then the staff again follows the above-mentioned steps of pressing the plywood, and extrude the second layer of plywood through the first lower expansion mold 21, the first upper expansion mold 23 and the first extrusion member 26 to manufacture a composite plywood cylinder.

[0038] When the hot pressing of the plywood cylinder is completed and plywood still needs to be pressed thereon, the first lower expansion mold 21, the first upper expansion mold 23 and the first extrusion member 26 are disassembled according to the same steps as above to further press a new plywood onto the plywood.

[0039] When there is no need to continue pressing the plywood on the plywood cylinder, the staff controls the fixed clamping claw 18 on the upper clamping frame 17 through the control terminal to release the clamping of the upper rotating slide rail 19, and rotates the upper rotating slide rail 19 to expose the space on the front side of the fixed roller 4, and the staff removes the plywood cylinder from the fixed roller 4.

[0040] Example 2: An environmentally friendly plywood cylinder structure, referring to Fig.13 As shown, it includes an outer plywood 35, an inner plywood 36 and a double-sided glued veneer 37. The outer plywood 35, the double-sided glued veneer 37 and the inner plywood 36 are all cylindrical structures with decreasing diameters. The double-sided glued veneer 37 maintains a firm connection with the outer plywood 35 and the inner plywood 36 through the glue applied on both sides. The arc between the cylindrical interface of the outer plywood 35 and the cylindrical interface of the inner plywood 36 is 180°, so that it is difficult for the inner plywood 36 on the inside to squeeze the outer plywood 35 on the outside to spread together. The cylindrical interface of the outer plywood 35, the cylindrical interface of the double-sided glued veneer 37 and the cylindrical interface of the inner plywood 36 are staggered in pairs, so that the three are adhered and restrained to each other, thereby increasing the firmness of the cylinder formed by the three, and reducing the probability that the three plywoods will collapse outward along their cylindrical interfaces due to excessive force during subsequent use of the plywood cylinder.

[0041] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hot pressing device for rounding environmentally friendly plywood, comprising a frame (1), the frame (1) being fixedly connected to a support plate (2), the support plate (2) being equipped with an electric rotating shaft (3), the outer side of the electric rotating shaft (3) being fixedly connected to a fixed roller (4), the lower part of the frame (1) being fixedly connected to two symmetrically distributed groups of first hydraulic push rods (5), each group comprising evenly distributed first hydraulic push rods (5), the telescopic ends of all the first hydraulic push rods (5) being slidably connected to a fixed plate (6), wherein: It also includes two groups of symmetrically distributed fixed frames (7), each group includes evenly distributed fixed frames (7), the fixed frames (7) are fixedly connected to the telescopic ends of the adjacent first hydraulic push rods (5), a tension spring (8) is installed between the fixed frames (7) and the fixed plate (6), a lower mold (9) is fixedly connected to the upper side of the fixed plate (6), the fixed frames (7) are slidably connected to a sliding frame (10), the sliding frames (10) on the first hydraulic push rods (5) in the same group are commonly fixedly connected to an extrusion roller (13), the support plate (2) is fixedly connected to a fixed slide rail (14) slidably connected to the adjacent sliding frame (10), and an extrusion mechanism for extruding the upper part of the plywood is arranged on the upper side of the frame (1).

2. The hot pressing device for assembling environmentally friendly plywood as claimed in claim 1, characterized in that: The extrusion mechanism comprises two groups of symmetrically distributed second hydraulic push rods (15), each group comprises uniformly distributed second hydraulic push rods (15), the telescopic ends of the second hydraulic push rods (15) in the same group are commonly fixedly connected to an upper mold (16), the lower mold (9) and the symmetrically distributed upper mold (16) together form a complete circle, and the lower mold (9) and the symmetrically distributed upper mold (16) are commonly provided with an expansion component for changing their respective thicknesses.

3. The hot pressing device for assembling environmentally friendly plywood as claimed in claim 2, characterized in that: A symmetrically distributed clamping frame (17) is fixedly connected to one side of the frame (1) away from the support plate (2), and the clamping frame (17) is equipped with symmetrically distributed fixed clamping claws (18). The clamping frame (17) on one side is equipped with symmetrically distributed upper rotating slide rails (19) through the fixed clamping claws (18) thereon, and the clamping frame (17) on the other side is equipped with symmetrically distributed lower rotating slide rails (20) through the fixed clamping claws (18) thereon. The upper rotating slide rail (19) is rotatably connected to the adjacent lower rotating slide rail (20), and the upper rotating slide rail (19) and the adjacent lower rotating slide rail (20) form a slide rail with the same structure as the adjacent fixed slide rail (14).

4. The hot pressing device for assembling environmentally friendly plywood as claimed in claim 3 is characterized by: The fixed slide rail (14) is provided with an arc-shaped slide groove and symmetrically distributed vertical slide grooves, the vertical slide grooves are connected to adjacent arc-shaped slide grooves, and the length of the vertical slide grooves is greater than the thickness of the upper mold (16).

5. The hot pressing device for assembling environmentally friendly plywood as claimed in claim 4, characterized in that: The expansion component comprises a first lower expansion mold (21), the first lower expansion mold (21) is arranged in the lower mold (9), the first lower expansion mold (21) is provided with a second lower expansion mold (22), the upper mold (16) is provided with a first upper expansion mold (23), the first upper expansion mold (23) is provided with a second upper expansion mold (24), the first lower expansion mold (21), the second lower expansion mold (22), the symmetrically distributed first upper expansion mold (23) and the symmetrically distributed second upper expansion mold (24) are all fixedly connected with a pair of The first lower expansion mold (21) is connected to the lower mold (9) by bolts via the fixing parts (25) thereon, the second lower expansion mold (22) is connected to the first lower expansion mold (21) by bolts via the fixing parts (25) thereon, the first upper expansion mold (23) is connected to the adjacent upper mold (16) by bolts via the fixing parts (25) thereon, and the second upper expansion mold (24) is connected to the adjacent first upper expansion mold (23) by bolts via the fixing parts (25) thereon.

6. The hot pressing device for assembling environmentally friendly plywood as claimed in claim 5, characterized in that: The outer side of the extrusion roller (13) is rotatably connected to a first extrusion member (26), and the outer side of the first extrusion member (26) is rotatably connected to a second extrusion member (27). The first extrusion member (26) and the second extrusion member (27) are both fixedly connected to a connecting member (271). The first extrusion member (26) is bolted to the adjacent extrusion roller (13) via the connecting member (271) thereon, and the second extrusion member (27) is bolted to the adjacent first extrusion member (26) via the connecting member (271) thereon.

7. The hot pressing device for assembling environmentally friendly plywood as claimed in claim 6, characterized in that: The cross-sections of the first extruded component (26) and the second extruded component (27) are both C-shaped, and the angles of the outer arc section of the first extruded component (26) and the outer arc section of the second extruded component (27) are both greater than 180 degrees, and the angles of the inner arc section of the first extruded component (26) and the inner arc section of the second extruded component (27) are both less than or equal to 180 degrees.

8. The hot pressing device for assembling environmentally friendly plywood as claimed in claim 7, characterized in that: A third hydraulic push rod (28) is fixedly connected to the upper side of the frame (1), a spray head (29) is fixedly connected to the telescopic end of the third hydraulic push rod (28), and the spray head (29) is located directly above the fixed roller (4).

9. The hot pressing device for assembling environmentally friendly plywood as claimed in claim 8, characterized in that: The lower mold (9), the upper mold (16), the first lower expansion mold (21), the second lower expansion mold (22), the symmetrically distributed first upper expansion mold (23) and the symmetrically distributed second upper expansion mold (24) are all provided with heating chambers. The lower mold (9), the upper mold (16), the symmetrically distributed first lower expansion mold (21) and the symmetrically distributed first upper expansion mold (23) are all fixedly connected with a male joint (30) which is in communication with the heating chambers therein. The male joint (30) is provided with a first interface (301) and a second interface (302). A male valve (31) is slidably connected to the male joint (30), and a tension spring is installed between the two. The first interface (301) and the second interface (302) are both sealed and matched with the adjacent male valve (31). The second lower expansion mold (22), the second upper expansion mold (24), the male connector (30) on the first lower expansion mold (21) and the male connector (30) on the first upper expansion mold (23) are all fixedly connected to a female connector (32) through a hose, a female clamping valve (33) is slidably connected inside the female connector (32), and a tension spring is fixedly connected between the two. The female connector (32) and the adjacent female clamping valve (33) are sealed and limitedly matched, and the female clamping valve (33) and the adjacent male clamping valve (31) are pressed and matched. The female connector (32) is slidably connected to a sleeve (34) outside, and a spring is fixedly connected between the two. A limiting ball is slidably connected inside the female connector (32), and the limiting ball is limitedly matched with the adjacent sleeve (34). The upper limiting ball of the female connector (32) is limitedly matched with the adjacent male connector (30).

10. An environmentally friendly plywood cylinder structure, characterized by: The invention comprises an outer plywood (35), an inner plywood (36) and a double-sided glued veneer (37); the outer plywood (35), the double-sided glued veneer (37) and the inner plywood (36) are all cylindrical structures with successively decreasing diameters; the arc between the cylindrical interface of the outer plywood (35) and the cylindrical interface of the inner plywood (36) is 180°; the cylindrical interface of the outer plywood (35), the cylindrical interface of the double-sided glued veneer (37) and the cylindrical interface of the inner plywood (36) are arranged alternately in pairs.

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