Pressing device for plywood production

Abstract

A plywood production pressing device comprises a hydraulic power pressing assembly and a hot pressing middle interlayer assembly. The hot pressing middle interlayer assembly is arranged on the hydraulic power pressing assembly, the hydraulic power pressing assembly comprises a fixed bottom plate and a movable pressing plate, the movable pressing plate is configured to ascend and descend up and down relative to the fixed bottom plate, and the movable pressing plate and the fixed bottom plate are used for conducting hot pressing on plywood; the hot-pressing middle interlayer assembly comprises an interlayer plate, the interlayer plate is arranged between the movable pressing plate and the fixed bottom plate, and the distance between the interlayer plate and the fixed bottom plate is adjustable; a heating pipe is arranged in the sandwich plate, the heating pipe is used for heating the sandwich plate, the station in the feeding process is kept unchanged, climbing operation is not needed, the feeding process is more convenient and safer, and automatic feeding can be achieved in cooperation with various feeding machines.

Description

Technical Field

[0001] The invention belongs to the technical field of plywood pressing equipment, and in particular relates to a plywood production pressing device. Background Art

[0002] Plywood needs to be pressed during production. Multiple layers of core boards are coated with adhesive and stacked to form plywood. In the actual production process, in order to achieve better bonding effect, the core boards need to be hot pressed, that is, the core boards and adhesive are heated while pressing. The heated wood surface and interior produce a chemical reaction, so that the wood surface and interior can withstand more pressure and friction, thereby improving the strength of the plywood.

[0003] When the existing hot press machine is hot pressing plywood, the position and spacing of the multi-layer heating components are fixed. When loading, the plywood needs to be placed between each layer of heating components from bottom to top, which is not only time-consuming and labor-intensive, but also poses a safety hazard of climbing. At the same time, when the existing hot press machine is hot pressing plywood, the edge of the plywood is prone to temperature loss, resulting in uneven temperature at the edge and center of the plywood, which in turn causes defects such as delamination and cracking of the plywood. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a plywood production pressing device to at least partially solve the above technical problems.

[0005] The technical solution adopted by the present invention is as follows: The present invention proposes a plywood production pressing device, including a hydraulic power pressing component and a hot pressing intermediate sandwich component, the hot pressing intermediate sandwich component is arranged on the hydraulic power pressing component, the hydraulic power pressing component includes a fixed base plate and a movable pressing plate, the movable pressing plate is configured to rise and fall relative to the fixed base plate, the movable pressing plate and the fixed base plate are used for hot pressing the plywood; the hot pressing intermediate sandwich component includes a sandwich plate, the sandwich plate is arranged between the movable pressing plate and the fixed base plate, and the distance between the sandwich plate and the fixed base plate is adjustable; a heating pipe is provided inside the sandwich plate, and the heating pipe is used to heat the sandwich plate.

[0006] Furthermore, it also includes an edge insulation component, which includes an insulation bellows and a blower, the blower is connected to the insulation bellows, and the air outlet position of the insulation bellows corresponds to the edge position of the sandwich panel; the insulation bellows is provided with an insulation pipe, the insulation pipe is provided with a heat pipe interface, the heat pipe interface is connected to the heating pipe, and the insulation pipe exchanges heat with the heating pipe through the heat pipe interface.

[0007] Furthermore, the hot-pressed intermediate sandwich assembly further comprises a vertical screw, a screw elevator and a lifting motor, the sandwich plate is arranged on the vertical screw, the vertical screw is arranged on the screw elevator, and the screw elevator controls the lifting and lowering of the sandwich plate through the vertical screw; The lifting motor is connected to the screw lift, and the lifting motor is used to drive the screw lift to work.

[0008] Furthermore, the hot-pressed intermediate sandwich assembly also includes a linkage shaft and a rotating shaft support, and the linkage shaft is rotatably arranged on the rotating shaft support; the linkage shaft is used to link the multiple screw elevators.

[0009] Furthermore, a vertical slide bar is provided on the fixed bottom plate, and the movable pressure plate is slidably connected to the vertical slide bar; a laminated hydraulic cylinder is provided on the top of the movable pressure plate, and the laminated hydraulic cylinder drives the movable pressure plate to slide on the vertical slide bar.

[0010] Furthermore, a heat source input port is provided on the heating tube, and the heating tube is a hollow fluid pipe. The heat source input port is connected to an external fluid heat source, and the external fluid heat source is connected to the heating tube through the heat source input port.

[0011] Furthermore, a heating wire is provided in the heating tube, the heating wire is electrically connected to an external AC power source, and the heating wire is used to heat the heating tube.

[0012] Furthermore, an electromagnetic induction coil is provided outside the heating tube, the electromagnetic induction coil is electrically connected to an external AC power supply, the material of the heating tube is metal, and the electromagnetic induction coil is used to heat the heating tube.

[0013] Furthermore, the heating tube is provided with a temperature sensor, and the temperature sensor is used to detect the temperature of the heating tube.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The insulation pipe proposed in the present invention absorbs the heat in the heating pipe and releases it through the heat pipe interface. The insulation pipe can be arranged on all sides of the plywood, or the insulation pipe can be arranged on only one side of the plywood and a wind shield can be arranged on the other side. The hot air blown out of the insulation bellows is confined around the plywood, and the edge of the plywood is insulated through air convection and heat exchange. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional plywood production pressing device proposed in an embodiment of the present invention Figure 1 ; Figure 2 A front view of a plywood production pressing device proposed in an embodiment of the present invention; Figure 3A top view of a plywood production pressing device proposed in an embodiment of the present invention; Figure 4 A left side view of a plywood production pressing device provided in an embodiment of the present invention; Figure 5 for Figure 4 The cross-sectional view along the AA direction; Figure 6 for Figure 4 The cross-sectional view along the BB direction; Figure 7 A three-dimensional plywood production pressing device proposed in an embodiment of the present invention Figure 2 .

[0016] Among them, 100, hydraulic power pressing assembly, 200, hot pressing middle interlayer assembly, 300, edge insulation assembly, 101, fixed bottom plate, 102, movable pressing plate, 103, laminating hydraulic cylinder, 104, vertical sliding rod, 201, interlayer plate, 202, vertical screw, 203, screw lifter, 204, heating pipe, 205, heat source input port, 206, linkage shaft, 207, rotating shaft support, 208, lifting motor, 301, insulation bellows, 302, blower, 303, insulation pipe, 304, heat pipe interface.

[0017] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0020] This embodiment is used for hot pressing of plywood. The existing hot press has a multi-layer heating structure. The positions and spacings of these heating mechanisms cannot be changed after they are unfolded. When loading, the plywood can only be placed in the multi-layer heating mechanism one by one, which is cumbersome to operate and has safety hazards. At the same time, the existing heating structure cannot insulate the edge of the plywood, resulting in poor structural strength at the edge. The edge of the plywood can only be cut off in the subsequent process, causing unnecessary waste.

[0021] like Figure 1-Figure 7 As shown, this embodiment includes a hydraulic power pressing component 100 and a hot pressing intermediate interlayer component 200. The structure of the hydraulic power pressing component 100 includes a fixed base plate 101 and a movable pressing plate 102. The movable pressing plate 102 can be raised and lowered relative to the fixed base plate 101. The fixed base plate 101 is fixedly set on the ground. When the plywood is hot pressed, the plywood is placed between the fixed base plate 101 and the movable pressing plate 102. The movable pressing plate 102 is pressed when it descends.

[0022] The hot-pressed intermediate sandwich assembly 200 proposed in this embodiment includes a sandwich plate 201, which is arranged between a fixed bottom plate 101 and a movable pressing plate 102. At the same time, the sandwich plate 201 is clamped between two plywood boards when in use. The sandwich plate 201 can be raised and lowered relative to the fixed bottom plate 101, which is more convenient for loading. At the same time, a heating tube 204 is arranged in the sandwich plate 201, and the heating tube 204 is used to heat the sandwich plate 201, so as to achieve the effect of hot-pressing plywood.

[0023] When this embodiment is used, the corresponding sandwich panels 201 are set according to the number of plywood sheets to be hot-pressed at a time. First, the movable pressing plate 102 is raised to the highest position, and then all the sandwich panels 201 are lowered onto the fixed bottom plate 101. At this time, the plywood to be processed is placed on the uppermost sandwich panel 201. Then, the sandwich panel 201 drives the plywood to move upward to the position of the movable pressing plate 102. At this time, plywood continues to be placed on the uppermost sandwich panel 201. The above steps are repeated until plywood sheets have been placed on all the sandwich panels 201. At this time, the heating tube 204 is started to heat the plywood through the sandwich panels 201, and at the same time, the movable pressing plate 102 moves downward to hot-press all the plywood sheets.

[0024] During use of this embodiment, when loading, all the sandwich panels 201 are moved to the fixed bottom plate 101 at the bottom. It is only necessary to place the plywood on the top sandwich panel 201, and then the sandwich panel 201 is lifted up with the plywood. At this time, the sandwich panel 201 of the second layer becomes the sandwich panel 201 of the top layer. The loading of the plywood can be completed by repeating the above steps. The work station of the entire loading process remains unchanged, and there is no need to climb high. The loading process is more convenient and safe, and it can also cooperate with a variety of loading machines to realize automatic loading.

[0025] The present embodiment further includes an edge insulation component 300, which is used to insulate the edge of the plywood, thereby ensuring that the edge of the plywood does not suffer from obvious temperature loss and improving the edge heat pressing effect of the plywood.

[0026] The edge insulation component 300 proposed in this embodiment includes an insulation bellows 301 and a blower 302. The blower 302 is connected to the insulation bellows 301. When the blower 302 is working, it blows air out of the insulation bellows 301. The insulation bellows 301 is provided with a plurality of insulation pipes 303. All the insulation pipes 303 are connected to a heat pipe interface 304. The heat pipe interface 304 is connected to the heating pipe 204. There is heat exchange between the insulation pipe 303 and the heating pipe 204. The heat in the heating pipe 204 can be transferred to the insulation pipe 303, thereby raising the temperature of the insulation pipe 303 to be equal to the temperature of the heating pipe 204. The air blown out from the insulation bellows 301 by the blower 302 can transfer the heat on the insulation pipe 303 to the edge of the plywood, thereby achieving insulation of the plywood.

[0027] When this embodiment is in use, the insulation pipe 303 absorbs the heat in the heating pipe 204 through the heat pipe interface 304 and releases it. The insulation pipe 303 can be set on all four sides of the plywood, or the insulation pipe 303 can be set on only one side of the plywood and a wind shield can be set on the other side. The hot air blown out of the insulation bellows 301 is confined around the plywood, and the edge of the plywood is insulated through air convection and heat exchange.

[0028] The hot-pressed intermediate sandwich assembly 200 proposed in this embodiment also includes a vertical screw 202, a screw elevator 203 and a lifting motor 208. The sandwich plate 201 is arranged on the vertical screw 202, and the vertical screw 202 is arranged on the screw elevator 203. The screw elevator 203 controls the lifting and lowering of the sandwich plate 201 through the vertical screw 202. The lifting motor 208 is connected to the screw elevator 203, and the lifting motor 208 is used to drive the screw elevator 203 to work.

[0029] In this embodiment, when loading, the screw elevator 203 drives the vertical screw 202 to rotate so that the sandwich panel 201 moves downward. When the sandwich panel 201 moves to the bottom, the plywood is placed on the sandwich panel 201. Then the screw elevator 203 drives the vertical screw 202 to rotate in the opposite direction so that the vertical screw 202 moves upward.

[0030] By setting a lifting motor 208 and a screw lift 203 to drive the vertical screw 202 to rotate, the sandwich panel 201 can be driven to move. The lifting and lowering of the sandwich panel 201 can be controlled by changing the rotation direction of the vertical screw 202. The lifting motor 208 can quickly change the direction of rotation to change the vertical screw 202, with higher control accuracy and faster response speed. At the same time, the screw lift 203 can also provide sufficient torque to drive the sandwich panel 201 to drive the plywood to rise.

[0031] The present embodiment proposes that the hot-pressed intermediate sandwich assembly 200 also includes a linkage shaft 206 and a rotating shaft support 207, and the linkage shaft 206 is rotatably arranged on the rotating shaft support 207; the linkage shaft 206 is used to link the multiple screw elevators 203. In order to ensure that the lifting and lowering of the sandwich panel 201 can be balanced, vertical screws 202 and screw elevators 203 are arranged at the four corners of the sandwich panel 201 for driving, so that the forces acting on the four corners of the sandwich panel 201 are balanced with each other, thereby avoiding damage to the sandwich panel 201 due to uneven force.

[0032] In order to reduce costs and save energy, the input shafts of the screw lifts 203 at corresponding positions can be connected through a linkage shaft 206, so that one lifting motor 208 can be used to drive two or more screw lifts 203. Although more structures are introduced, the use of active drive components can be reduced, thereby achieving the purpose of reducing costs and saving energy.

[0033] The fixed base plate 101 proposed in this embodiment is provided with a vertical slide bar 104, and the movable pressing plate 102 is slidably connected to the vertical slide bar 104; a laminating hydraulic cylinder 103 is provided on the top of the movable pressing plate 102, and the laminating hydraulic cylinder 103 drives the movable pressing plate 102 to slide on the vertical slide bar 104. By limiting the sliding of the movable pressing plate 102 on the vertical slide bar 104, it is ensured that the movable pressing plate 102 and the fixed base plate 101 can be accurately aligned. In actual use, the fixed base plate 101 and the movable pressing plate 102 have a high degree of alignment to avoid virtual pressure on the plywood.

[0034] When in use, this embodiment drives the movable pressing plate 102 to move toward the fixed base plate 101 through the laminating hydraulic cylinder 103, squeezes the plywood between the movable pressing plate 102 and the fixed base plate 101, and cooperates with the heating effect of the heating tube 204 on the sandwich plate 201 to achieve hot pressing of the plywood. The laminating hydraulic cylinder 103 can provide greater pressure to ensure the effect of hot pressing.

[0035] The heating tube 204 proposed in this embodiment is provided with a heat source input port 205, and the heating tube 204 is a hollow fluid pipeline. The heat source input port 205 is connected to an external fluid heat source, and the external fluid heat source is connected to the heating tube 204 through the heat source input port 205. The external fluid heat source can be hot water, hot oil or hot gas, which can be selected according to the hot pressure temperature range to be controlled during use. When the fluid heat source is used to heat the heating tube 204, the heating tube 204 can be connected to the insulation tube 303, and the insulation tube 303 can be heated at the same time.

[0036] The heat transfer effect of the fluid heating system is stable and reliable. Since the flow state of the medium has little effect, the temperature of the heated workpiece can be kept stable. An automatic control system can be used, which is easy and flexible to operate, and the heating conditions can be adjusted at any time to meet different heating requirements. At the same time, the maintenance and maintenance of the fluid heating system is relatively simple. Generally, it only requires regular replacement of the hot fluid medium and checking whether the equipment is normal, which greatly reduces the difficulty of equipment maintenance and labor costs.

[0037] Another embodiment of the present invention provides a heating wire in the heating tube 204, wherein the heating wire is electrically connected to an external AC power source and is used to heat the heating tube 204. The heating wire directly converts electrical energy into thermal energy and does not require a heat transfer medium. Therefore, energy loss is small and thermal efficiency is high. By controlling the current, precise temperature control can be achieved to avoid energy waste.

[0038] At the same time, AC power can be adjusted through a transformer to easily change the voltage and current to meet the power requirements of different devices. In addition, the periodic changes in AC power can make the heating wire repeatedly heated and cooled, which helps to extend its service life.

[0039] In another embodiment of the present invention, an electromagnetic induction coil is provided on the outside of the heating tube 204, and the electromagnetic induction coil is electrically connected to an external AC power supply. The material of the heating tube 204 is metal, and the electromagnetic induction coil is used to heat the heating tube 204. The electromagnetic induction coil directly generates heat inside the heating tube 204, so the heating speed is fast and the heating is uniform. The thermal efficiency of the electromagnetic heating system can utilize energy more effectively than the resistance heating method, and the energy-saving effect is more significant. The electromagnetic heater is small in size and simple in structure, which is easy to integrate and move.

[0040] At the same time, electromagnetic heating does not involve combustion, so it is safer to use and can be used to process wood such as plywood.

[0041] The temperature of the heating tube 204 is monitored in real time by the temperature sensor on the heating tube 204, so that the temperature of the heating tube 204 can be adjusted in time to achieve a better hot pressing effect.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0043] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A plywood production pressing device, characterized in that: The invention comprises a hydraulic pressure pressing assembly (100) and a hot pressing intermediate sandwich assembly (200), wherein the hot pressing intermediate sandwich assembly (200) is arranged on the hydraulic pressure pressing assembly (100), and the hydraulic pressure pressing assembly (100) comprises a fixed bottom plate (101) and a movable pressing plate (102), wherein the movable pressing plate (102) is configured to rise and fall relative to the fixed bottom plate (101), and the movable pressing plate (102) and the fixed bottom plate (101) are used for hot pressing plywood; The hot-pressed intermediate sandwich assembly (200) comprises a sandwich plate (201), wherein the sandwich plate (201) is arranged between a movable pressing plate (102) and a fixed bottom plate (101), and the distance between the sandwich plate (201) and the fixed bottom plate (101) is adjustable; A heating tube (204) is provided inside the sandwich plate (201), and the heating tube (204) is used to heat the sandwich plate (201).

2. The plywood production pressing device according to claim 1, characterized in that: It also includes an edge insulation component (300), the edge insulation component (300) including a heat-insulating bellows (301) and a blower (302), the blower (302) being connected to the heat-insulating bellows (301), and the air outlet position of the heat-insulating bellows (301) corresponding to the edge position of the sandwich panel (201); The heat-insulating wind box (301) is provided with a heat-insulating pipe (303), the heat-insulating pipe (303) is provided with a heat pipe interface (304), the heat pipe interface (304) is connected to the heating pipe (204), and the heat-insulating pipe (303) performs heat exchange with the heating pipe (204) via the heat pipe interface (304).

3. The plywood production pressing device according to claim 1, characterized in that: The hot-pressed intermediate sandwich assembly (200) further comprises a vertical screw (202), a screw elevator (203) and an elevator motor (208); the sandwich plate (201) is arranged on the vertical screw (202); the vertical screw (202) is arranged on the screw elevator (203); the screw elevator (203) controls the lifting and lowering of the sandwich plate (201) through the vertical screw (202); The lifting motor (208) is connected to the screw lift (203), and the lifting motor (208) is used to drive the screw lift (203) to work.

4. The plywood production pressing device according to claim 3, characterized in that: The hot-pressed intermediate sandwich assembly (200) further comprises a linkage shaft (206) and a rotating shaft support (207); the linkage shaft (206) is rotatably disposed on the rotating shaft support (207); the linkage shaft (206) is used to link the plurality of screw elevators (203).

5. The plywood production pressing device according to claim 1, characterized in that: A vertical slide bar (104) is provided on the fixed bottom plate (101), and the movable pressing plate (102) is slidably connected to the vertical slide bar (104); a laminating hydraulic cylinder (103) is provided on the top of the movable pressing plate (102), and the laminating hydraulic cylinder (103) drives the movable pressing plate (102) to slide on the vertical slide bar (104).

6. The plywood production pressing device according to claim 1, characterized in that: The heating tube (204) is provided with a heat source input port (205); the heating tube (204) is a hollow fluid pipeline; the heat source input port (205) is connected to an external fluid heat source; the external fluid heat source is connected to the heating tube (204) through the heat source input port (205).

7. The plywood production pressing device according to claim 1, characterized in that: A heating wire is provided in the heating tube (204), the heating wire is electrically connected to an external AC power source, and the heating wire is used to heat the heating tube (204).

8. The plywood production pressing device according to claim 1, characterized in that: An electromagnetic induction coil is provided outside the heating tube (204), the electromagnetic induction coil is electrically connected to an external AC power source, the heating tube (204) is made of metal, and the electromagnetic induction coil is used to heat the heating tube (204).

9. The plywood production pressing device according to claim 1, characterized in that: The heating tube (204) is provided with a temperature sensor, and the temperature sensor is used to detect the temperature of the heating tube (204).

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