Continuous press

Abstract

The present invention discloses a continuous press, comprising a preheating and pressurizing unit, a heating and pressurizing unit, a cooling and pressurizing unit, and a steel belt transmission unit for connecting the heating and pressurizing unit and the cooling and pressurizing unit in series; the preheating and pressurizing unit comprises a first roller group mechanism for providing pressure and a heating device for providing non-contact heating, and a transport device for transmitting materials located between the first roller group mechanisms and cooperating with the first roller group mechanisms; the cooling and pressurizing unit comprises a second roller group mechanism for providing pressure and a heat insulation device for maintaining the internal temperature of the cooling and pressurizing unit. The continuous press of the present invention has low energy consumption, low cost, long service life, short production cycle, high efficiency in producing plywood, and good molding quality.

Description

Technical Field

[0001] The invention relates to the technical field of biomass material manufacturing, in particular to a continuous press for preparing wood plywood. Background Art

[0002] At present, China's large number of plywood enterprises are gradually showing problems such as small scale, simple machinery and equipment, backward technology, monotonous product variety and uneven quality. With the rising prices of raw materials and the increasing labor costs, the profits of plywood enterprises are constantly being squeezed. Plywood continuous production technology will be promoted and applied.

[0003] Due to the special properties of plywood, there are few pores between the slabs, and the amount of air contained is very small. The rebound force of the slab is smaller than that of fiberboard and particleboard, but it also makes it difficult to discharge the water vapor inside the slab. The existing continuous press for producing fiberboard and particleboard basically uses a roller chain plus double steel belt structure, which is suitable for process conditions with high pressure, high temperature and uniformity, but cannot solve the problems of bubbling, delamination and other defects caused by the inability to smoothly remove water vapor from plywood. In addition, the traditional roller chain double steel belt continuous press equipment is expensive and requires large investment. The length of the press used for plywood production is longer than that of the press used for fiberboard and particleboard, which is very unfavorable for the development and promotion of plywood continuous technology.

[0004] Therefore, the continuous press suitable for plywood production needs to be further upgraded and improved. Summary of the invention

[0005] In view of the technical problems in the prior art, the present invention provides a continuous press, which has low energy consumption, low cost, long service life, short production cycle, high efficiency in producing plywood and good molding quality.

[0006] To achieve the above-mentioned purpose, the present invention provides a continuous press, comprising a preheating and pressing unit, a heating and pressing unit, a cooling and pressing unit, and a steel belt transmission unit for connecting the heating and pressing unit and the cooling and pressing unit in series;

[0007] The preheating and pressurizing unit includes a first roller group mechanism for providing pressure and a heating device for providing non-contact heating, and a transport device for transporting materials located between the first roller group mechanisms and cooperating with the first roller group mechanisms;

[0008] The cooling and pressing unit includes a second roller group mechanism for providing pressure and a heat insulating device for maintaining the internal temperature of the cooling and pressing unit.

[0009] According to one aspect of the present invention, the first roller group mechanism comprises an upper roller group with adjustable position, and a lower roller group with fixed position located below the upper roller group and arranged corresponding to the upper roller group;

[0010] The upper roller group comprises an upper mounting seat and an upper roller wheel mounted on the upper mounting seat;

[0011] The lower roller group comprises a lower mounting seat and a lower roller wheel mounted on the lower mounting seat.

[0012] According to one aspect of the present invention, the preheating and pressurizing unit further comprises a pressure regulator mounted on the upper mounting seat and the lower mounting seat for adjusting the upper and lower positions of the upper roller group;

[0013] The preheating and pressurizing unit further includes a shielding layer for preventing radiation.

[0014] According to one aspect of the present invention, the heating device may be a microwave heating device, a high-frequency radiation heating device or an infrared radiation heating device.

[0015] According to one aspect of the present invention, the second roller group mechanism includes a moving roller group, a fixed roller group located below the moving roller group and arranged corresponding to the moving roller group;

[0016] The moving roller group includes a movable frame, a guide mechanism, and a moving roller wheel;

[0017] The fixed roller group includes a fixed frame and a fixed roller wheel installed on the fixed frame;

[0018] The second roller group mechanism also includes a pressure device installed on the guide mechanism and the fixed frame for adjusting the upper and lower positions of the moving roller;

[0019] The guide mechanism comprises a guide post mounted on the movable frame, a wear-resistant plate mounted on the guide post and a guide block for connecting the moving roller;

[0020] The guide block is further provided with a guide protrusion, and the guide protrusion is located between the two guide pillars;

[0021] The heat insulation device comprises a side heat insulation layer and upper and lower heat insulation layers, and a fluid injection device is also arranged inside the heat insulation device.

[0022] According to one aspect of the present invention, the steel belt transmission unit includes a steel belt roller group, a steel belt connected to the steel belt roller group for transmitting materials, and a roller for adjusting the stress of the steel belt;

[0023] The steel belt roller group includes an active roller group and a passive roller group;

[0024] The passive roller group includes an upper passive roller and a fixed lower passive roller;

[0025] The upper passive roller is provided with an adjustment mechanism capable of adjusting the position of the upper passive roller;

[0026] The adjustable angle range of the upper passive roller is 0° to 15°.

[0027] According to one aspect of the present invention, the heating and pressurizing unit comprises a pressurizing mechanism and a heating plate;

[0028] The pressurizing mechanism comprises a frame, and a pressure supply device mounted on the frame;

[0029] The heating plate comprises an upper heating plate and a lower heating plate, wherein the lower heating plate is relatively arranged below the upper heating plate;

[0030] The upper heating plate is connected to the pressure supply device, and the lower heating plate is fixedly mounted on the frame;

[0031] and an upper roller blanket mechanism and a lower roller blanket mechanism surrounding the frame, the heating plate and the pressure supply device, acting on the working surface of the heating plate in synchronization with the steel strip;

[0032] The upper roller blanket mechanism and the lower roller blanket mechanism both include a positioning roller wheel and a roller blanket;

[0033] The upper roller blanket mechanism also includes a movable roller wheel;

[0034] The movable roller is provided with a guiding and pressing mechanism which can adjust the upper and lower positions of the movable roller.

[0035] According to one aspect of the present invention, an auxiliary pressurizing device for preventing a pressure vacuum period from occurring is provided between the heating and pressurizing unit and the passive roller group.

[0036] According to one aspect of the present invention, the auxiliary pressure device comprises an upper auxiliary roller group, a lower auxiliary roller group located below the upper auxiliary roller group and fixed in position corresponding to the upper auxiliary roller group;

[0037] The upper auxiliary roller group includes an upper support frame and an upper roller mounted on the upper support frame;

[0038] The lower auxiliary roller group includes a fixed lower support frame and a lower roller mounted on the lower support frame;

[0039] The upper support frame is provided with an adjusting device for adjusting the up and down position of the upper auxiliary roller group.

[0040] According to one aspect of the present invention, a transition device similar in structure to the preheating and pressurizing unit is provided between the preheating and pressurizing unit and the passive roller group for preventing a pressure vacuum period;

[0041] A transition pressure maintaining device for preventing pressure windows is also provided between the heating and pressurizing unit and the cooling and pressurizing unit.

[0042] According to one solution of the present invention, the present invention sets the preheating and pressurizing unit, the heating and pressurizing unit and the cooling and pressurizing unit in sequence and continuously, realizes the continuous production and one-time forming of plywood, and improves the production efficiency of the continuous press. In addition, the plywood slab adopts different pressurizing methods in different production stages, which reduces the number of traditional roller chains and the control difficulty of the press; at the same time, the pressure conduction structure of the roller-acting thickness section is used to reduce the amount of heating plates, reduce the difficulty of equipment processing and manufacturing, and make the thickness control faster and more flexible, and stabilize the accuracy of thickness control, thereby improving product quality and generating better economic benefits.

[0043] According to one solution of the present invention, the continuous press of the present invention divides the traditional hot pressing process into two parts, and realizes cooling of the plate in the hot pressing equipment. After the slab is close to being formed, it can be cooled in time, so that the steam pressure inside the slab is reduced, which can shorten the time of the steam exhaust process, thereby reducing the overall hot pressing time, not only reducing the length of the hot pressing equipment, but also reducing the heat consumption. At the same time, it is of great benefit to avoid defects such as blistering and delamination in plywood products.

[0044] According to one solution of the present invention, a non-contact heating device is used to effectively increase the heating speed, save heating time, improve the production efficiency of the continuous press, make the production process safer and more efficient, and also reduce the cost of the equipment.

[0045] According to one solution of the present invention, both the upper roller and the lower roller are solid rollers. The solid rollers are subjected to stable force and work reliably without deformation due to excessive pressure.

[0046] According to one solution of the present invention, the upper roller group can adjust the upper and lower positions through a pressure regulator, so it can adapt to the production and processing of plywood of different thicknesses and sizes, and provide appropriate pressure at the same time.

[0047] According to one solution of the present invention, the preheating and pressurizing unit further comprises a shielding layer. The shielding layer is used to prevent harmful rays such as microwaves from harming surrounding objects or the environment. The preheating and pressurizing unit realizes simultaneous heating and pressurization of the plywood blank, meeting the production requirements of the plywood, ensuring the bonding quality of the plywood, and thus ensuring the molding quality of the plywood.

[0048] According to one solution of the present invention, the rollers are mainly arranged beside the passive roller group, and their supporting positions are adjustable and can change with the position of the upper passive roller. In this way, it can ensure that the steel belt and the rollers themselves are well stressed, ensure the normal operation of the work, and ensure the high efficiency of plywood production.

[0049] According to one solution of the present invention, the upper passive roller can be adjusted in its up and down position by an adjustment mechanism, thereby adjusting the feeding angle of the plywood slab. The feeding angle ranges from 0° to 15°. Since the up and down position of the upper passive roller can be adjusted adaptively, plywood of different thicknesses can be adaptively processed, so that the continuous press according to the present invention has better versatility and higher efficiency. The adjustment mechanism can adopt a screw mechanism, or other mechanisms that can adjust the up and down position of the upper passive roller. This makes the structure of the present invention relatively simple, low cost, and low energy consumption.

[0050] According to one solution of the present invention, a guide clamping mechanism is provided on the movable roller to adjust the upper and lower positions of the movable roller. In this embodiment, the guide clamping mechanism acts on the steel belt, and by adjusting the guide clamping mechanism, the steel belt can be ensured to act horizontally on the plywood to maintain a good pressure state.

[0051] According to one solution of the present invention, the pressure device in the second roller group mechanism drives the moving roller to move up and down, so that the moving roller can apply different pressures to the plywood, meet the process control requirements, and realize the product thickness determination function.

[0052] According to one scheme of the present invention, the heat insulation device can make the cooling and pressurizing unit enclosed in a certain space to achieve temperature stability in this space. The cooling and pressurizing unit is the cooling and thickness setting section of the plywood. In this section, the plywood can be cooled and thickness-set, and the product can be discharged through this section. Therefore, a cooling device that can reduce the temperature of the plywood to the required temperature needs to be provided in the heat insulation device. A fluid injection device is provided in the heat insulation device, which can spray atomized fluid on the inner surface of the steel belt or the surface of the roller, so that the temperature of the plywood being processed can be reduced and the temperature can be maintained at the same time. At the same time, the plywood being processed can contain a certain amount of moisture to control the performance of the board, so that the produced plywood has better performance and better molding quality.

[0053] According to one solution of the present invention, a transition device having a structure similar to that of the preheating and pressing unit is provided between the preheating and pressing unit and the passive roller group. An auxiliary pressing device for preventing a pressure vacuum period is also provided between the heating and pressing unit and the passive roller group. The transition device and the auxiliary pressing device can effectively prevent a pressure vacuum period from occurring during the processing of the plywood slab, and can ensure that the continuous press according to the present invention continuously applies pressure to the plywood, so that the production and processing will not be interrupted, thereby ensuring production efficiency.

[0054] According to one scheme of the present invention, the adjustment device adopts a hydraulic cylinder, which is hinged to the upper support frame. By adjusting the upper auxiliary roller group through the adjustment device, the upper auxiliary roller group can always press the steel belt tightly, ensuring that the plywood slab is subjected to pressure in time, ensuring the normal production of plywood, and ensuring the yield of finished products.

[0055] According to one solution of the present invention, a transition pressure-maintaining device for preventing pressure windows is also provided between the heating and pressurizing unit and the cooling and pressurizing unit. In this way, after the plywood slab passes through the heating and pressurizing unit, it can be transferred to the cooling and pressurizing unit without losing pressure through the transition pressure-maintaining device. When entering the cooling and pressurizing unit, the plywood can be set in thickness and stabilized in performance, thus ensuring that the plywood slab can maintain a good gluing state before being finished, and will not deform or cause other undesirable conditions.

[0056] According to one solution of the present invention, the structure of the continuous press of the present invention is simple and reasonable, and no high-energy-consuming mechanism or device is used, so the energy consumption is lower and the cost is lower; and because the preheating and pressurizing unit of the continuous press of the present invention uses solid rollers and microwave energy radiation heating to cooperate with pressurization and heating, oil leakage and easy damage of rollers will not occur. The continuous press of the present invention has a longer life and is more durable. The continuous press of the present invention has a very high production efficiency for plywood, and has good molding quality, and will not produce the phenomenon of overlapping cores and separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 is a front view schematically showing the structural arrangement of a continuous press according to the present invention;

[0058] Figure 2 is a front view schematically showing the structural arrangement of a continuous press according to the present invention;

[0059] Figure 3 is a front view schematically showing the structural arrangement of a continuous press according to the present invention;

[0060] Figure 4 is a partial view schematically showing the structural arrangement of a continuous press according to the present invention;

[0061] Figure 5is a side view schematically showing a second roller set mechanism of a continuous press according to the present invention;

[0062] Figure 6 It is a schematic representation Figure 5 Partial cross-sectional view of AA;

[0063] Figure 7 is a front view schematically showing the structural arrangement of a continuous press according to the present invention;

[0064] Figure 8 is a partial view schematically showing the structural arrangement of a continuous press according to the present invention. DETAILED DESCRIPTION

[0065] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0066] When describing the embodiments of the present invention, the orientation or positional relationship expressed by the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or positional relationship shown in the relevant drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0067] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments cannot be described one by one here, but the embodiments of the present invention are not therefore limited to the following embodiments.

[0068] Figure 1 and Figure 2 A front view schematically shows the structural arrangement of a continuous press according to an embodiment of the present invention.

[0069] like Figure 1As shown, the continuous press according to the present invention includes a preheating and pressing unit 1, a heating and pressing unit 2, a cooling and pressing unit 3, and a steel belt transmission unit 4. In this embodiment, the preheating and pressing unit 1, the heating and pressing unit 2 and the cooling and pressing unit 3 are arranged in sequence from left to right. The steel belt transmission unit 4 is used to connect the heating and pressing unit 2 and the cooling and pressing unit 3 in series, and the heating and pressing unit 2 and the cooling and pressing unit 3 are both located in the steel belt transmission unit 4. In this embodiment, the preheating and pressing unit 1, the heating and pressing unit 2, the cooling and pressing unit 3, and the working parts of the steel belt transmission unit 4 have the same linear speed and operate synchronously. In this embodiment, the plywood blank to be processed can be completed by the preheating and pressing unit 1, the heating and pressing unit 2 and the cooling and pressing unit 3 to complete the finished product production, and no other equipment is required for processing, and the process from the blank to the finished product is completed in one step, so the production cycle is short and the efficiency of producing plywood is high.

[0070] According to one embodiment of the present invention, Figure 2 As shown, the preheating and pressurizing unit 1 includes a first roller group mechanism 101, a transport device 102 and a heating device 103. In this embodiment, the heating device 103 uses a non-contact heating method to heat the plywood blank. The heating device 103 can use a microwave heating device, a high-frequency radiation heating device or an infrared radiation heating device. The advantage of using a non-contact heating method to heat the plywood blank is that the plywood blank can be heated evenly, the surface and core layers of the plywood blank are equally hot, and the heating speed is fast and the time is short. It effectively prevents the disadvantages of uneven heating of the plywood and possible leakage of high-temperature oil, making the production process safer and more efficient. At the same time, it also makes the cost of the equipment lower. As Figure 2 As shown, the first roller group mechanism 101 includes an upper roller group 1011 and a lower roller group 1012. In this embodiment, the upper roller group 1011 and the lower roller group 1012 are arranged in a corresponding manner up and down, the position of the upper roller group 1011 is adjustable, and the lower roller group 1012 is fixed. Figure 2As shown, the upper roller group 1011 includes an upper mounting seat 1011a and a plurality of upper rollers 1011b installed on the upper mounting seat 1011a with a small distance between each other. The lower roller group 1012 includes a lower mounting seat 1012a and a plurality of lower rollers 1012b installed on the lower mounting seat 1012a with a small distance between each other. In this embodiment, the upper roller 1011b and the lower roller 1012b are both solid rollers, and the solid rollers are stable in force, reliable in operation, and will not be deformed due to excessive pressure. In this embodiment, when the above-mentioned heating device 103 adopts a microwave heating device, since the generated microwaves will have an adverse effect on metals, the above-mentioned mounting seat and rollers need to be made of non-metallic materials. In this embodiment, the mounting seat and rollers of non-metallic materials are made of polytetrafluoroethylene. When the heating device 103 adopts other heating devices, the mounting seat and rollers can be made of metal materials.

[0071] like Figure 2 As shown, the preheating and pressurizing unit 1 further includes a pressure regulator 104. In this embodiment, the fixed end of the pressure regulator 104 is mounted on the lower mounting seat 1012a, and the working end is mounted on the upper mounting seat 1011a. The pressure regulator 104 is used to adjust the upper and lower positions of the upper roller group 1011. By adjusting the upper and lower positions of the upper roller group 1011, the pressure on the plywood blank can be adjusted. Figure 2 As shown, the transport device 102 includes a belt 1021 and a roller 1022 for supporting the belt 1021. In this embodiment, the belt 1021 is installed in the preheating and pressurizing unit 1 in a reasonable manner through the roller 1022, and passes through the upper roller group 1011 and the lower roller group 1012 from above and below respectively, and is in contact and connected with the upper roller 1011b and the lower roller 1012b. A first channel S1 for conveying plywood slabs is formed between the position where the belt 1021 and the upper roller 1011b contact each other and the position where the belt 1021 and the lower roller 1012b contact each other. Because the upper roller group 1011 can adjust the upper and lower positions through the pressure regulator 104, it can adapt to the production and processing of plywood of different thicknesses and sizes, and provide appropriate pressure at the same time. In this embodiment, the upper roller 1011b and the lower roller 1012b can be driven to rotate by the belt 1021. Considering the lack of friction between the belt 1021 and the rollers, a driving device can also be provided to drive the rollers to rotate. Each roller can be driven individually or simultaneously. In this embodiment, the rotation of the rollers is synchronized with the belt 1021, and the linear speed of the rollers is the same as the linear speed of the belt 1021. Figure 2As shown, in this embodiment, the preheating and pressurizing unit 1 also includes a shielding layer 105. The shielding layer 105 is used to prevent harmful rays such as microwaves from damaging surrounding objects or the environment. In this embodiment, the preheating and pressurizing unit 1 can heat and pressurize the plywood blank at the same time through the above-mentioned settings, thus meeting the production requirements of plywood. Because the feeding speed of plywood is slow during the production of plywood, heating and pressurizing cannot be separated. The preheating and pressurizing unit 1 enables the adhesive in the plywood blank to pressurize the plywood blank at the same time during the heating process, thereby ensuring the bonding quality between the layers of the blank, thereby ensuring the molding quality of the plywood.

[0072] According to one embodiment of the present invention, Figure 2 As shown, the steel belt transmission unit 4 includes a steel belt roller group 401, a steel belt 402 and a roller 403. The steel belt roller group 401 includes an active roller group 4011 and a passive roller group 4012. The passive roller group 4012 includes an upper passive roller 4012a and a fixed lower passive roller 4012b. The upper passive roller 4012a is provided with an adjustment mechanism 4012c that can adjust the position of the upper passive roller 4012a. In this embodiment, the steel belt roller group 401 and the steel belt 402 are connected to each other, and a plurality of rollers 403 can be provided, which are mainly used to adjust the stress condition of the steel belt 402. In this embodiment, the roller 403 is mainly arranged beside the passive roller group 4012, and its supporting position is adjustable, which can change with the change of the position of the upper passive roller 4012a, so that the stress condition of the steel belt 402 and the roller 403 itself can be ensured to be good, the normal operation of the work can be ensured, and the high efficiency of producing plywood can be ensured. In this embodiment, the steel belt 402 may be provided with one upper and one lower belt, or two upper and two lower belts.

[0073] Figure 3 The side view schematically shows the structural arrangement of the passive roller group of the continuous press according to one embodiment of the present invention. Figure 2 and Figure 3As shown, according to an embodiment of the present invention, the upper passive roller 4012a and the lower passive roller 4012b are both supported on the steel belt passive frame 4013. In this embodiment, the steel belt passive frame 4013 includes a passive frame side plate 4013a and a passive frame pull plate 4013b. The passive frame side plate 4013a and the passive frame pull plate 4013b are connected to each other to form a frame structure of the steel belt passive frame 4013. In this embodiment, the steel belt passive frame 4013 is also provided with a first connecting seat 4014a, a second connecting seat 4014b and a slide rail 4014c for connecting the upper passive roller 4012a and the lower passive roller 4012b. The first connecting seat 4014a, the second connecting seat 4014b and the slide rail 4014c are all supported on the passive frame side plate 4013a in the same direction, and the second connecting seat 4014b and the slide rail 4014c are fixedly connected to the passive frame side plate 4013a respectively. The first connecting seat 4014a can be supported on the slide rail 4014c in a linear sliding manner along the slide rail 4014c. The upper passive roller 4012a is rotationally connected to the first connecting seat 4014a, and the lower passive roller 4012b is rotationally connected to the second connecting seat 4014b, and the axes of the upper passive roller 4012a and the lower passive roller 4012b are parallel to each other. The adjustment mechanism 4012c is connected to the first connecting seat 4014a, so that the upper passive roller 4012a can adjust its upper and lower positions through the adjustment mechanism 4012c, thereby adjusting the feeding angle of the plywood slab. In the present embodiment, the range of this feeding angle is 0° to 15°. Since the upper and lower positions of the upper passive roller 4012a can be adaptively adjusted, plywood of different thicknesses can be adaptively processed, so that the continuous press according to the present invention has better versatility and higher use efficiency. In the present embodiment, the adjustment mechanism 4012c can adopt a screw mechanism, such as Figure 3 As shown, the screw rod is fixed in position, and the screw rod is driven to rotate at a certain angular velocity by a screw rod transmission device, and feedback control is performed by setting a rotary encoder, so that the first connecting seat 4014a connected to the nut on the screw rod is linearly moved up and down along the screw rod axis direction, thereby realizing the adjustment of the upper passive roller 4012a up and down position. In this embodiment, the screw rod transmission device can be composed of an electric motor and a reducer. The adjustment mechanism 4012c can also adopt other mechanisms that can adjust the upper passive roller 4012a up and down. This makes the structure of the present invention relatively simple, low cost, and low energy consumption.

[0074] Figure 4 FIG. 2 is a partial view schematically showing the structural arrangement of a continuous press according to the present invention. Figure 2 and Figure 4As shown, according to an embodiment of the present invention, the heating and pressurizing unit 2 includes a pressurizing mechanism 201, a heating plate 202, an upper roller blanket mechanism 203 and a lower roller blanket mechanism 204. In this embodiment, the pressurizing mechanism 201 includes a frame 2011, and a pressure supply device 2012. The pressure supply device 2012 is installed on the frame 2011. In this embodiment, the heating plate 202 includes an upper heating plate 2021 and a lower heating plate 2022. The lower heating plate 2022 is arranged opposite to the upper heating plate 2021, and the lower heating plate 2022 is located below the upper heating plate 2021. The lower heating plate 2022 is installed on the frame 2011 and has a fixed height. The upper heating plate 2021 is connected to the pressure supply device 2012, and the upper heating plate 2021 can be adjusted up and down with the pressure supply device 2012. The pressure supply device 2012 can not only apply pressure to the slab downward through the upper heating plate 2021, but also lift the upper heating plate 2021 upward. The upper heating plate 2021 and the lower heating plate 2022 are provided with channels inside, which can be conveniently passed with hot oil or other medium for heating and maintaining high temperature. The upper heating plate 2021 and the lower heating plate 2022 are used to heat the plywood being processed. The pressure supply device 212 applies pressure to the upper heating plate 2021, and the upper heating plate 2021 pressurizes the plywood being processed. Figure 2 As shown, the upper roller blanket mechanism 203 surrounds the frame 2011, the upper heating plate 2021 and the pressure supply device 2012, and the lower roller blanket mechanism 204 surrounds the frame 2011 and the lower heating plate 2022. Figure 2 As shown, both the upper blanket roller mechanism 203 and the lower blanket roller mechanism 204 include a positioning roller 2031 and a blanket roller 2032. The positioning roller 2031 is used to support the blanket roller 2032 so that the blanket roller 2032 can be tensioned. In this embodiment, the working portion of the blanket roller 2032 contacts the heating plate 202, and the steel belt 402 contacts the working portion of the blanket roller 2032. The portion where the steel belt 402 contacts the blanket roller 2032 of the upper blanket roller mechanism 203 and the portion where the steel belt 402 contacts the blanket roller 2032 of the lower blanket roller mechanism 204 form a second channel S2 for producing plywood. Figure 2 and Figure 4 As shown, the upper roller blanket mechanism 203 also includes a movable roller 2033, and the movable roller 2033 is provided with a guide pressing mechanism 2033a that can adjust the upper and lower positions of the movable roller 2033. In this embodiment, the guide pressing mechanism 2033a acts on the steel belt 402. By adjusting the guide pressing mechanism 2033a, it can be ensured that the steel belt 402 acts horizontally on the plywood to maintain a good pressure state. Figure 4The movable roller 2033 is rotatably connected to the roller mounting seat, and the roller mounting seat is fixedly mounted on the head of the upper heating plate 2021. The movable end of the guide and clamping mechanism 2033a is hinged to the upper end of the roller mounting seat, and its fixed end is hinged to the frame 2011. The guide and clamping mechanism 2033a acts on the roller mounting seat, so that the head of the upper heating plate 2021 remains in a downward pressure state, providing pressure for the slab, and through position control, ensures that the upper heating plate 2021 and the lower heating plate 2022 are in the same height from front to back. Figure 2 As shown, the roller blanket 2032 moves synchronously with the steel belt 402 at the same linear speed. The highest position of the lower passive roller 4012b is kept level with the steel belt 402 and the roller blanket 2032 in the lower roller blanket mechanism 204. The roller blanket 2032 is provided with rollers to reduce friction between the heating plate 202 and the steel belt 402. At the same time, the roller blanket 2032 plays a role in heat transfer between the heating plate 202 and the steel belt 402.

[0075] Figure 5 is a side view schematically showing a second roller assembly mechanism of a continuous press according to the present invention. According to one embodiment of the present invention, as combined with Figure 2 and Figure 5As shown, the cooling and pressurizing unit 3 includes a second roller group mechanism 301 for providing pressure and a heat insulation device 302 for maintaining the internal temperature of the cooling and pressurizing unit 3. In this embodiment, the second roller group mechanism 301 includes a moving roller group 3011, and a fixed roller group 3012 located below the moving roller group 3011 and arranged corresponding to the moving roller group 3011. The moving roller group 3011 includes a movable frame 3011a, a guide mechanism 3013, a moving roller wheel 3011b, and a pressure device 3011c installed on the guide mechanism 3013 and the fixed frame 3012a for adjusting the upper and lower positions of the moving roller group 3011. The fixed roller group 3012 includes a fixed frame 3012a, and a fixed roller wheel 3012b installed on the fixed frame 3012a. In this embodiment, the moving roller wheel 3011b is arranged in a one-to-one correspondence with the guide mechanism 3013. At the same time, the pressure device 3011c is in a one-to-one correspondence with the guide mechanism 3013. The pressure device 3011c can drive the guide mechanism 3013 to move, thereby driving the moving roller 3011b to move up and down, while the fixed roller 3012b is fixed in position, so that the moving roller 3011b can apply different pressures to the plywood, meet the process control requirements, and achieve the product thickness determination function. In this embodiment, the moving roller 3011b and the fixed roller 3012b are in contact with the steel belt 402 respectively, so that the position where the moving roller 3011b contacts the steel belt 402 and the position where the fixed roller 3012b contacts the steel belt 402 form a third channel S3 for transmitting the plywood being processed. In this embodiment, the first channel S1, the second channel S2 and the third channel S3 are interconnected. In this embodiment, the moving roller 3011b and the fixed roller 3012b can be driven to rotate by the steel belt 402. If the friction between the steel belt 402 and the roller is insufficient, a driving device can also be set to drive the roller to rotate. Each roller can be driven individually or simultaneously. In this embodiment, the rotation of the roller is synchronized with the steel belt 402, and the linear speed of the roller is the same as the linear speed of the steel belt 402. In this embodiment, the heat insulation device 302 can enclose the cooling and pressurizing unit 3 in a certain space to achieve temperature stability in this space. The cooling and pressurizing unit 3 is a plywood cooling and thickness setting section. In this section, the plywood can be cooled and thickness-set, and the product can be discharged through this section. Therefore, a cooling device that can reduce the temperature of the plywood to the required temperature needs to be set in the heat insulation device 302. In this embodiment, a fluid injection device is provided in the heat insulation device 302, which can spray atomized fluid on the inner surface of the steel belt or the roller surface, so that the temperature of the plywood being processed can be reduced and the temperature can be maintained. At the same time, the plywood being processed can contain a certain amount of moisture, control the performance of the board, and make the plywood produced have better performance and better molding quality.

[0076] like Figure 5 As shown, according to one embodiment of the present invention, the fixed frame 3012a includes a column 3012c, a lower pull beam 3012d and a lower cross beam 3012e. Figure 2 As shown, the lower cross beam 3012e in the fixing frame 3012a is placed horizontally, and three upright posts 3012c are vertically arranged along the lower cross beam 3012e. Of course, the number of upright posts 3012c can be four, five or more according to actual conditions. Figure 5 As shown, the columns 3012c on the left and right sides of the fixed frame 3012a are connected by the pull-down beam 3012d, so that the fixed frame 3012a forms a frame structure.

[0077] like Figure 5 As shown, according to one embodiment of the present invention, the movable frame 3011a includes an upper beam 3011d, an upper cross beam 3011e and a suspension column 3011f. In this embodiment, the upper cross beam 3011e and the lower cross beam 3012e are parallel to each other and are located above the lower cross beam 3012e. At least two upper beams 3011d are arranged along the upper cross beam 3011e, and the suspension columns 3011f are fixedly connected to both ends of the upper beam 3011d, so that the movable frame 3011a forms a frame structure.

[0078] Figure 6 It is a schematic representation Figure 5 The partial cross-sectional view of AA in FIG. Figure 5 and Figure 6 As shown, according to an embodiment of the present invention, in the moving roller group 3011, the guide mechanism 3013 includes a guide column 3013a, a wear-resistant plate 3013b and a guide block 3013c. In this embodiment, the guide column 3013a is arranged in sequence along the upper crossbeam 3011e, and the wear-resistant plate 3013b is installed on both sides of the guide column 3013a correspondingly to the guide column 3013a. The guide block 3013c is provided with a guide protrusion 3013d, and the guide protrusion 3013d is located between the two guide columns 3013a. At the same time, the moving roller 3011b is rotatably connected to the guide block 3013c, the movable end of the pressure device 3011c is hinged to the guide block 3013c, and the fixed end of the pressure device 3011c is hinged to the lower crossbeam 3012e. The pressure device 3011c drives the guide block 3013c to move up and down, and the guide column 3013a and the wear plate 3013b are used to position the height direction, so as to adjust the up and down position of the moving roller 3011b. At the same time, the distance between the moving roller 3011b and the fixed roller 3012b is detected by the displacement sensor to realize the thickness determination function.

[0079] Combination Figure 2 and Figure 5As shown, according to one embodiment of the present invention, the heat insulation device 302 includes a side heat insulation layer 3021 and upper and lower heat insulation layers 3022. In this embodiment, the side heat insulation layer 2021 is installed on the upper cross beam 3011e, the lower cross beam 3012e and the guide block 3013c, and the upper and lower heat insulation layers 3022 are installed on the upper pull beam 3011d and the lower pull beam 3012d, so that the side heat insulation layer 3021 and the upper and lower heat insulation layers 3022 enclose the moving roller 3011b, the fixed roller 3012b and the steel belt 402 in the space to maintain the temperature, while the pressure device 3011c and the like are isolated from the outside.

[0080] Figure 7 2 is a front view schematically showing the structural arrangement of a continuous press according to the present invention. Figure 2 and Figure 7 As shown, a transition device 6 having a structure similar to that of the preheating and pressing unit 1 is provided between the preheating and pressing unit 1 and the passive roller group 4012. The transition device 6 is used to prevent a pressure vacuum period from occurring during the processing of the plywood slab. The pressure vacuum means that after one end of the plywood slab passes through the preheating and pressing unit 1, there is no pressure acting on the plywood, and it enters the heating and pressing unit 2 through a pressure-free journey. The occurrence of a pressure vacuum period may cause the plywood to jump back to its original unprocessed state, which may cause the position of the plywood to deviate when it enters the heating and pressing unit 2, or even prevent it from entering the heating and pressing unit 2, resulting in stagnation of production and reduced production efficiency. The above problem can be solved by providing a transition device 6 between the preheating and pressing unit 1 and the passive roller group 4012, and pressure can be applied to the plywood continuously, so that the production and processing will not be interrupted, thereby ensuring production efficiency.

[0081] Figure 8 FIG. 2 is a partial view schematically showing the structural arrangement of a continuous press according to the present invention. Figure 7 and Figure 8 As shown, according to one embodiment of the present invention, an auxiliary pressurizing device 5 for preventing a pressure vacuum period is also provided between the heating and pressurizing unit 2 and the passive roller group 4012. In this embodiment, the auxiliary pressurizing device 5 includes an upper auxiliary roller group 501, and a lower auxiliary roller group 502 is provided below the upper auxiliary roller group 501 and corresponding to the upper auxiliary roller group 501. In this embodiment, the position of the lower auxiliary roller group 502 is fixed, and it includes a lower support frame 5021 and a lower roller 5022 mounted on the lower support frame 5021. The lower support frame 5021 is fixedly supported on the passive frame side plate 4013a by fixed legs 5023, as shown in FIG. Figure 8As shown in , two fixed legs 5023 are arranged parallel to each other on the lower support frame 5021. Of course, three, four or more fixed legs 5023 can also be arranged as needed. In this embodiment, the position of the upper auxiliary roller group 501 is adjustable. The upper auxiliary roller group 501 includes an upper support frame 5011 and an upper roller 5012 installed on the upper support frame 5011. In this embodiment, as Figure 8 As shown, the right end of the upper support frame 5011 is hinged to the central axis of the movable roller 2033, and the upper support frame 5011 is provided with an adjustment device 5013 for adjusting the upper and lower positions of the upper auxiliary roller group 501. The movable end of the adjustment device 5013 is hinged to the upper support frame 5011, and its fixed end is hinged to the passive frame side plate 4013a. In this embodiment, there are multiple upper rollers 5012 and lower rollers 5022, and the gap between each roller is small. The height of the lower roller 5022 is fixed, and the position of the upper roller 5012 is adjustable. The upper roller 5012 and the lower roller 5022 are both provided with a driving device, which drives the rollers to rotate, and is synchronized with the rotation of the steel belt 402, and the linear speed is the same. In this embodiment, the adjustment device 5013 can adopt a hydraulic cylinder, which is hinged to the upper support frame 5011. By adjusting the upper auxiliary roller group 501 through the adjustment device 5013, the upper auxiliary roller group 501 can always press the steel belt 402 to ensure that the plywood slab is subjected to pressure in time, ensure the normal production of plywood, and ensure the yield rate.

[0082] According to one embodiment of the present invention, a transition pressure-maintaining device for preventing pressure windows is also provided between the heating and pressurizing unit 2 and the cooling and pressurizing unit 3. In this way, after the plywood slab passes through the heating and pressurizing unit 2, it can be transferred to the cooling and pressurizing unit 3 without losing pressure through the transition pressure-maintaining device. After entering the cooling and pressurizing unit 3, the plywood can be set in thickness and stabilized in performance, thus ensuring that the plywood slab can maintain a good gluing state before being finished, and will not deform or cause other undesirable conditions.

[0083] The above contents are merely examples of specific implementations of the present invention. For devices and structures not described in detail, it should be understood that they can be implemented by adopting general devices and general methods available in the art.

[0084] The above is only one embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A continuous press, characterized in that: It comprises a preheating and pressurizing unit (1), a heating and pressurizing unit (2), a cooling and pressurizing unit (3), and a steel belt transmission unit (4) for connecting the heating and pressurizing unit (2) and the cooling and pressurizing unit (3) in series; The preheating and pressurizing unit (1) comprises a first roller group mechanism (101) for providing pressure, a heating device (103) for providing non-contact heating, and a transport device (102) for transporting materials, located between the first roller group mechanism (101) and cooperating with the first roller group mechanism (101); The cooling and pressurizing unit (3) comprises a second roller group mechanism (301) for providing pressure and a heat insulation device (302) for maintaining the internal temperature of the cooling and pressurizing unit (3); The second roller group mechanism (301) comprises a moving roller group (3011), and a fixed roller group (3012) located below the moving roller group (3011) and arranged corresponding to the moving roller group (3011); The moving roller group (3011) comprises a movable frame (3011a), a guide mechanism (3013), and a moving roller wheel (3011b); The fixed roller group (3012) comprises a fixed frame (3012a) and a fixed roller (3012b) mounted on the fixed frame (3012a); The second roller group mechanism (301) further comprises a pressure device (3011c) installed on the guide mechanism (3013) and the fixed frame (3012a) for adjusting the upper and lower positions of the moving roller (3011b); The guide mechanism (3013) comprises a guide column (3013a) mounted on the movable frame (3011a), a wear-resistant plate (3013b) mounted on the guide column (3013a), and a guide block (3013c) used for connecting the moving roller (3011b); The guide block (3013c) is further provided with a guide protrusion (3013d), and the guide protrusion (3013d) is located between the two guide pillars (3013a); The pressure device (3011c) drives the guide block (3013c) to move up and down, and the guide column (3013a) and the wear-resistant plate (3013b) perform height positioning, thereby achieving adjustment of the upper and lower positions of the moving roller (3011b); The cooling and pressurizing unit (3) is provided with a displacement sensor for detecting the distance between the moving roller 3011b and the fixed roller 3012b; The heat insulation device (302) comprises a side heat insulation layer (3021) and upper and lower heat insulation layers (3022), and a fluid injection device is also provided inside the device; The first roller group mechanism (101) comprises an upper roller group (1011) whose position is adjustable, and a lower roller group (1012) whose position is fixed and is located below the upper roller group (1011) and is arranged corresponding to the upper roller group (1011); The upper roller group (1011) comprises an upper mounting seat (1011a) and an upper roller (1011b) mounted on the upper mounting seat (1011a); The lower roller group (1012) comprises a lower mounting seat (1012a) and a lower roller (1012b) mounted on the lower mounting seat (1012a); The preheating and pressurizing unit (1) further comprises a pressure regulator (104) mounted on the upper mounting seat (1011a) and the lower mounting seat (1012a) for adjusting the upper and lower positions of the upper roller group (1011).

2. The continuous press according to claim 1, characterized in that The preheating and pressurizing unit (1) further comprises a shielding layer (105) for preventing radiation.

3. The continuous press according to claim 1, characterized in that The heating device (103) may be a microwave heating device, a high-frequency radiation heating device or an infrared radiation heating device.

4. The continuous press according to claim 1, characterized in that The steel belt transmission unit (4) comprises a steel belt roller group (401), a steel belt (402) connected to the steel belt roller group (401) for transmitting materials, and a roller (403) for adjusting the stress of the steel belt (402); The steel belt roller group (401) comprises an active roller group (4011) and a passive roller group (4012); The passive roller group (4012) comprises an upper passive roller (4012a) and a fixed lower passive roller (4012b); The upper passive roller (4012a) is provided with an adjustment mechanism (4012c) capable of adjusting the position of the upper passive roller (4012a); The adjustable angle range of the upper passive roller (4012a) is 0° to 15°.

5. The continuous press according to claim 4, characterized in that The heating and pressurizing unit (2) comprises a pressurizing mechanism (201) and a heating plate (202); The pressurizing mechanism (201) comprises a frame (2011) and a pressure supply device (2012) installed on the frame (2011); The heating plate (202) comprises an upper heating plate (2021) and a lower heating plate (2022), wherein the lower heating plate (2022) is relatively arranged below the upper heating plate (2021); The upper heating plate (2021) is connected to the pressure supply device (2012), and the lower heating plate (2022) is fixedly mounted on the frame (2011); and an upper roller blanket mechanism (203) and a lower roller blanket mechanism (204) surrounding the frame (2011), the heating plate (202) and the pressure supply device (2012), acting on the working surface of the heating plate (202) in synchronization with the steel belt (402); The upper roller blanket mechanism (203) and the lower roller blanket mechanism (204) both comprise a positioning roller wheel (2031) and a roller blanket (2032); The upper roller blanket mechanism (203) further comprises a movable roller wheel (2033); The movable roller (2033) is provided with a guiding and pressing mechanism (2033a) capable of adjusting the upper and lower positions of the movable roller (2033).

6. The continuous press according to claim 4, characterized in that An auxiliary pressurizing device (5) is provided between the heating and pressurizing unit (2) and the passive roller group (4012) to prevent a pressure vacuum period from occurring.

7. The continuous press according to claim 6, characterized in that The auxiliary pressure device (5) comprises an upper auxiliary roller group (501), and a lower auxiliary roller group (502) located below the upper auxiliary roller group (501) and fixed in position corresponding to the upper auxiliary roller group (501); The upper auxiliary roller group (501) comprises an upper support frame (5011) and an upper roller (5012) mounted on the upper support frame (5011); The lower auxiliary roller group (502) comprises a fixed lower support frame (5021) and a lower roller (5022) mounted on the lower support frame (5021); The upper support frame (5011) is provided with an adjustment device (5013) for adjusting the upper and lower positions of the upper auxiliary roller group (501).

8. The continuous press according to claim 7, characterized in that A transition device (6) having a structure similar to that of the preheating and pressurizing unit (1) and used to prevent a pressure vacuum period is provided between the preheating and pressurizing unit (1) and the passive roller group (4012); A transition pressure maintaining device for preventing a pressure window is also provided between the heating and pressurizing unit (2) and the cooling and pressurizing unit (3).

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