CN114888909A - Hot pressing equipment for bamboo and wood composite material - Google Patents
Hot pressing equipment for bamboo and wood composite material Download PDFInfo
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- CN114888909A CN114888909A CN202210705386.0A CN202210705386A CN114888909A CN 114888909 A CN114888909 A CN 114888909A CN 202210705386 A CN202210705386 A CN 202210705386A CN 114888909 A CN114888909 A CN 114888909A
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- 235000017166 Bambusa arundinacea Nutrition 0.000 title claims abstract description 31
- 235000017491 Bambusa tulda Nutrition 0.000 title claims abstract description 31
- 241001330002 Bambuseae Species 0.000 title claims abstract description 31
- 235000015334 Phyllostachys viridis Nutrition 0.000 title claims abstract description 31
- 239000011425 bamboo Substances 0.000 title claims abstract description 31
- 238000007731 hot pressing Methods 0.000 title claims abstract description 25
- 239000002023 wood Substances 0.000 title claims abstract description 25
- 239000002131 composite material Substances 0.000 title claims abstract description 19
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D3/00—Veneer presses; Press plates; Plywood presses
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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Abstract
The invention discloses bamboo and wood composite material hot-pressing equipment, which belongs to the field of mechanical manufacturing and comprises a host structure, a hydraulic servo system, an electrical control device, a mold temperature control device, a microwave heating device and a safety mechanism; the microwave heating system and the heat conducting oil heating system of the mold temperature controller are configured, and the two heating modes can be switched or combined for use so as to meet the material heating requirement. The hydraulic servo system is configured, so that the hydraulic servo system has the characteristics of energy conservation, environmental protection, high dynamic response and high-precision control; and the hot pressing temperature, the loading and unloading speed and the loading and unloading mode can be accurately controlled according to the control requirements, the data acquisition of the whole process is realized, and conditions are provided for the research of the quantitative control manufacturing parameters of the material performance.
Description
Technical Field
The invention belongs to the field of machine manufacturing, and particularly relates to hot-pressing equipment for bamboo and wood composite materials.
Background
The bamboo wood is a low-energy-consumption building material, and when the building area is the same, the energy consumption ratio of the bamboo wood to concrete is 1: 8, and the energy consumption ratio of the bamboo wood to steel is 1: 50. Compared with the conventional building materials such as reinforcing steel bars, concrete and the like, the bamboo wood building material discharges a large amount of carbides in the production process, can be used for carbon fixation in the growth process, and is an environment-friendly building structure material. China enjoys the beauty of bamboo kingdom in the world, bamboo resources are most abundant, bamboo has the advantages of high strength, good elasticity, strong impact resistance and the like, and has excellent earthquake resistance, and the bamboo has the advantage of difficult fire hazard due to high ignition point. In order to increase the environmental applicability, bamboo wood is endowed with new functions of hydrophobicity, flame retardance, corrosion resistance, mildew resistance, insect prevention and the like, bamboo resources and bamboo resource reproducibility in China are abundant, and a structural system realized by combining modern advanced design, processing and construction technologies can be widely applied to modern building engineering and becomes a superior substitute material for wood.
At present, a hot press for biomass engineering materials such as bamboo and wood is mostly composed of an electric heating furnace or a boiler, a heating pipeline, a hot pressing plate and the like which are matched, heat conduction oil or steam is heated through an external heat source to heat the hot pressing plate, then the hot pressing plate heats plates through heat conduction, heat is firstly transferred to a heated object from the surface through conventional heating, convection, heat radiation and other means, then the central temperature is increased slowly through heat transfer, the central part is required to reach the required temperature, certain heat conduction time is needed, and the heat conduction time is overlong and the materials are heated unevenly. Especially, when a plywood with a larger thickness needs to be pressed, the defects are amplified, and the conventional hot press is usually used for pressing a bamboo plywood with the thickness of 200mm, which can be finished in 8 hours.
Disclosure of Invention
The invention provides hot-pressing equipment for bamboo and wood composite materials, which integrates microwave heating, heat-conducting oil (steam) heating and a press into a whole, wherein the two heating modes can be switched or combined for use so as to meet the material heating requirement, and the heating efficiency is greatly improved through actual use.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a hot pressing equipment of bamboo, wooden combined material, its main structure and part include: the system comprises a host system, a hydraulic servo system, an electrical control system, a mold temperature system, a microwave heating system, a safety system and a material conveying system; the hydraulic servo system, the die temperature system and the electric control system are installed and integrated on one side of the host system; the microwave heating system, the material conveying system and the safety system are respectively arranged on the inner side and the outer side of the host system, and the electric control system is connected with and controls the hydraulic servo system, the mould temperature system, the microwave heating system, the safety system and the material conveying system; the hydraulic pipeline, the heater pipeline, the air draft system and the safety system are integrally arranged on the host system;
the main machine structure comprises a ladder step, a main frame, a sealing plate, a sliding table, a hot plate, a hydraulic lifting mechanism, an upper maintenance platform, a lateral pressure mechanism, a main oil cylinder, a feeding door and a maintenance door; the upper maintenance platform is arranged above the main frame, and the ladder steps are arranged on the side surface of the main frame and are respectively connected with the main frame and the upper maintenance platform; the sealing plate is installed on the inner side of the main frame, the sliding table is installed below the sealing plate, the sealing plate is connected with the main frame and the sliding table through the installation sealing sheet and the shielding elastic sheet, the bottom of the sliding table is connected with the hot plate, the main oil cylinder and the sliding table are connected with the main frame through the locking device, the hydraulic lifting mechanism is installed on the inner side of the main frame and connected with the side pressing mechanism, and materials are fed into a working position in a main system through the feeding door.
The main frame consists of four groups of stand columns, an upper mounting seat, a lower mounting seat and a movable workbench, wherein the four groups of stand columns are welded into an H-shaped frame structure by adopting Q345 steel plates, and the upper mounting seat, the lower mounting seat and the movable workbench consist of structural members welded by Q345 steel plates; the upper plane of the movable workbench is connected with a main oil cylinder piston rod, the lower plane of the movable workbench is connected with the heat insulation layer and the heat conduction plate, and the lower plane of the upper mounting seat is connected with the main oil cylinder fixing disc.
The hydraulic servo system includes: the energy conversion device comprises a main oil pump, a lifting oil pump and an auxiliary oil pump, a hydraulic control device comprises an integrated valve block and a related control valve thereof, an auxiliary device comprises a main oil tank, an auxiliary oil tank, a cooling system, a circulating filtration system and a pipeline, hydraulic accessories (an oil filter, a flange, a joint, a pipeline and the like) and a hydraulic actuating mechanism (an oil cylinder). The various required actions are accomplished by means of control of the electrical system. The main oil tank is arranged on the side face of the main engine, the auxiliary oil tank is arranged on the top of the main engine, the energy conversion device and the hydraulic control device are arranged on the upper plane of the main oil tank in order, the hydraulic control device and the hydraulic actuating mechanism are connected with the oil tanks through pipelines, and the pipelines are arranged neatly, attractively and firmly.
The hydraulic servo system is provided with an independent oil filtering and cooling device, and the system can display the oil level, display the oil temperature and the blockage of an oil filter and give an alarm. The air port of the oil tank is provided with a filter of air equipment, the oil tank is sealed reliably, and external impurities can be prevented from entering the oil tank; the oil tank is of a steel plate welding structure, pickling, passivation and rust prevention treatment are carried out before assembly, the hydraulic system is provided with an oil level alarm and an oil temperature alarm, and the rotating speed of a servo motor in the hydraulic servo system is controlled in a closed loop mode.
The electrical control device comprises a PLC programmable controller which is respectively connected with a displacement photoelectric switch, a servo motor, a driver control element (a selection switch and a button), a switching power supply, a displacement sensor, a pressure sensor, a touch screen, a control cabinet and an operation panel, the PLC programmable controller is combined with a human-computer interface, and various process action cycles and data recording and setting of the equipment can be realized by programming special control software according to process requirements; the press machine has the advantages that two working modes of adjustment and single circulation can be realized through button centralized control, the pressing period can be adjusted according to the pressing process, the press machine can be designed according to the requirements of users, the control on the pressure and the displacement of a hydraulic actuating element, namely an oil cylinder is realized, the production process of equipment is further completed, the control system has a corresponding self-diagnosis function, the working information and common faults of the press machine can be displayed on a silver screen, and the equipment fault alarm system is arranged.
The microwave heating device includes: the device comprises a microwave source, a bidirectional directional coupler, a circulator, a three-pin regulator, a waveguide feed port (about a crack antenna), a waveguide microwave sealing element, a temperature measurement system, energy leakage detection, a microwave heating control system, a microwave heating cavity and a cooling system; the microwave heating control system is respectively connected with and controls the microwave source, the temperature measuring system and the cooling system; the microwave source feeds microwave energy into the microwave heating cavity through a gap of the crack antenna by sequentially connecting the bidirectional directional coupler, the circulator, the three-pin adjuster and the low-loss transmission waveguide; the waveguide feed ports are arranged on the left and right of the slot antenna; and installing a microwave seal at the position of the gap with the microwave leakage.
The main body frame of the microwave heating cavity is made of channel steel, and the cover plate, the inner cavity and the bottom plate of the box body shell are all designed and manufactured by adopting a No. 304 stainless steel plate with the thickness of 1.5 mm; the microwave heating box is provided with a large-opening door and a single-door structure, leakage-proof inhibiting sheets are arranged on the periphery of the door and provided with a visual observation window, the drying condition of materials can be seen, the door is provided with a safety switch device, the door is not closed tightly, the microwave does not work, the automatic power-off protection is realized when the door is opened, and the microwave stops outputting; the microwave feed inlets are arranged on two sides of the heating box, and the inlets are sealed by adopting non-wave-absorbing materials, so that dust is prevented from entering the waveguide to influence the normal work of the microwave; the top of the microwave heating box body is provided with a ventilation and moisture removal flange and an air box cover, and a user is connected with a centrifugal fan pipeline.
The mold temperature control system adopts an electric heating mold temperature machine, can realize automatic temperature control of a heated object, adopts heat conduction oil as a heat carrier, and utilizes a high-temperature circulating oil pump to forcibly circulate to convey heat energy to heating equipment; then returning to the direct-flow heating equipment for heating again, and repeating the steps in such a way, realizing the continuous increment of heat, raising the temperature of the heated object and achieving the process requirement of constant heating temperature. The mold temperature control device adopts an intelligent control system, can display a heating system state flow chart in real time, and is used for displaying and adjusting technical parameters such as equipment temperature, time and the like; the pipeline of the mold temperature control device adopts a special pipe for a GB3087 low-pressure boiler, and a 20# carbon steel pipeline is integrally formed by carbon steel, so that the system is reliable and oil-tight; the heating pipe of the mold temperature control device is made of U-shaped flange stainless steel F321, a 1.6Mpa pressure test is carried out to ensure safety, and the lead is connected by a high-temperature flame-retardant lead.
Safety device includes slip table safety locking device, and the design of business turn over door has interlock, and pause and scram button: when abnormality occurs, pressing a 'pause' button to stop the press, pressing an 'emergency stop' button to stop the operation of the press, wherein the press is provided with two emergency stop buttons, one emergency stop button is arranged on an operation control panel, and the other 1 emergency stop button is arranged on a movable operation table; in any state and under any condition, pressing any one of the emergency stop buttons, and stopping the press immediately; the safety device is equipped with two-handed operating buttons: pressing the two hands within 0.5s of the synchronization time limit, and if the two hands exceed the synchronization time limit, the two hands are invalid; the safety device is equipped with a hydraulic support safety circuit: in order to prevent the slide block from running out of control and ensure safety. A hydraulic interlocking loop is arranged to ensure that the upper cavity of the main cylinder cannot be pressurized when the supporting safety valve is not opened.
Has the advantages that: the invention provides hot-pressing equipment for bamboo and wood composite materials, which adopts double oil cylinders to move up and down and servo hydraulic control to realize automatic regulation and control (presetting and programming control) of temperature, pressure and speed, accurately control loading and unloading speed and mode, and simultaneously adopts microwave auxiliary heating to improve heating efficiency, greatly improve the production efficiency of the bamboo and wood composite materials, and achieve the purposes of high efficiency, energy conservation and cost reduction. The device integrates microwave heating, heat-conducting oil (steam) heating and a press into a whole, two heating modes can be switched or combined for use to meet the material heating requirement, the pressing of products of various materials and different specifications can be met, the function of one machine for multiple purposes is met, and the heating efficiency is greatly improved through actual use.
Drawings
FIG. 1 is a schematic structural diagram of a hot pressing apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a hot press apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a hydraulic servo system in an embodiment of the present invention;
FIG. 4 is a control block diagram of an electrical control system in an embodiment of the present invention;
FIG. 5 is a schematic view of a microwave heating apparatus in an embodiment of the present invention;
FIG. 6 is a schematic view of a microwave seal according to an embodiment of the present invention;
FIG. 7 is a diagram of a mold temperature machine in an embodiment of the present invention;
in the figure, 1 is a host system, 2 is a hydraulic servo system, 3 is an electrical control system, 4 is a mold temperature system, 5 is a microwave heating system, 6 is a safety system, 7 is a material conveying system, 1-1 is a ladder step, 1-2 is a main frame, 1-3 is a sealing plate, 1-4 is a sliding table, 1-5 is a hot plate, 1-6 is a material, 1-7 is a hydraulic lifting mechanism, 1-8 is an upper overhaul stand, 1-9 is a lateral pressure mechanism, 1-10 is a main oil cylinder, 1-11 is a feeding door, 1-12 is an overhaul door, 5-1 is a microwave source, 5-2 is a circulator, 5-3 is a three-pin adjuster, 5-4 is a waveguide, 5-5 is a waveguide feed port, 5-6 is a waveguide sealing element, and 5-7 is a temperature measuring system, 5-8 is an energy leakage detection system, 5-9 is a microwave heating control system, 5-10 is a microwave heating cavity, and 5-11 is a cooling system.
Detailed Description
The invention is described in detail below with reference to the following figures and specific examples:
as shown in fig. 1, a hot-pressing device for bamboo and wood composite materials comprises a host system 1, a hydraulic servo system 2, an electrical control system 3, a mold temperature system 4, a microwave heating system 5, a safety system 6 and a material conveying system 7; a hydraulic servo system 2, a mould temperature system 4 are installed and integrated on one side of the host system 1, and a microwave heating system 5 and an electric control system 3 are also installed and integrated on one side of the host machine frame; the hydraulic pipeline, the heater pipeline, the air draft system, the safety system and the sealing mechanism are integrally arranged on the host system 1;
as shown in fig. 2, a host system 1 comprises a ladder step 1-1, a main frame 1-2, a sealing plate 1-3, a sliding table 1-4, a hot plate 1-5, materials 1-6, a hydraulic lifting mechanism 1-7, an upper maintenance platform 1-8, a lateral pressure mechanism 1-9, a main oil cylinder 1-10, a feeding door 1-11 and an maintenance door 1-12;
the main machine 1-2 comprises four groups of upright posts, an upper mounting seat, a lower mounting seat and a movable workbench, wherein 4 groups of upright posts are welded into an H-shaped frame structure by adopting Q345 steel plates, and the upper mounting seat, the lower mounting seat and the movable workbench are formed by Q345 steel plates. The upper plane of the movable workbench is connected with a main oil cylinder piston rod, the lower plane of the upper mounting seat is connected with an oil cylinder fixing disc, and the lower plane of the movable workbench is connected with a heat insulation layer and a heat conduction plate.
As shown in fig. 3, the hydraulic servo system 2 is disposed and installed on the side of the host system, and mainly includes an energy conversion device (including a main oil pump, a lift oil pump, and an auxiliary oil pump component), a hydraulic control device (including an integrated valve block and its related control valves), an auxiliary device (including a main oil tank, a sub-oil tank, a cooling system, a circulation filtration system, and a pipeline), hydraulic accessories (an oil filter, a flange, a joint, and a pipeline), and a hydraulic actuator (an oil cylinder). The hydraulic servo system has motors driving corresponding oil pumps to rotate, the pumps suck oil from the oil tank and then convert mechanical energy into pressure energy of hydraulic oil, the hydraulic oil is regulated in direction, pressure and flow rate via the hydraulic controller and then is transmitted to the executing mechanisms of the equipment via external pipeline under the control of the electric system, and the pressure energy of the hydraulic oil is converted into mechanical energy and transmitted to the corresponding oil cylinders, so as to control the direction change, force strength and speed of the executing mechanisms of the hot pressing equipment and complete various designated technological actions and work cycles. By controlling and regulating the flow direction, pressure and flow of the hydraulic medium. Thereby controlling the movement direction of the actuating mechanism, the output force or moment, the movement speed and the action sequence, and limiting and adjusting the working pressure of the hydraulic system to ensure that the actuating element completes the expected working movement. The main oil tank is arranged on the side surface of the main machine, the auxiliary oil tank is arranged on the top of the main machine, and the energy conversion device and the hydraulic control device are orderly arranged on the upper plane of the main oil tank. The hydraulic control device and the hydraulic actuating mechanism are connected with each oil tank through pipelines, and the pipelines are neatly, attractive and firm in arrangement; the hydraulic servo system is provided with an independent oil filtering and cooling device, and the system can realize oil level display, oil temperature and oil filter blockage display and alarm. The air port of the oil tank is provided with a filter of air equipment, the oil tank is sealed reliably, and external impurities can be prevented from entering the oil tank; the oil tank is of a steel plate welding structure, pickling, passivation and rust prevention treatment are carried out before assembly, the hydraulic system is provided with an oil level alarm and an oil temperature alarm, and the rotating speed of a servo motor in the hydraulic servo system is controlled in a closed loop mode. After the hot pressing plate is closed to realize the working advance, the pressure supplementing pump set is used for automatically supplementing pressure in a pressure maintaining working section, the pressure can be preset to a value (within the range of 20% -100% of nominal pressure) through the touch screen to realize required pressing force, and the hydraulic system adopts the synchronous gear flow divider to supply oil to the oil cylinder to ensure that the oil cylinder has good synchronism. Compared with a variable pump system, the hydraulic servo system has the advantages that a servo motor is combined with the rapid stepless speed regulation characteristic of a constant delivery pump and the automatic oil pressure regulation characteristic of the system, so that huge energy-saving potential is brought, the servo hydraulic system can realize near zero power output when equipment is quickly loaded and material is sent and taken, energy is saved, the pressure control precision of the hydraulic servo system is +/-0.2 Mpa, and the display resolution is 0.1 Mpa; the position control precision is +/-0.05 mm, and the display resolution is 0.01 mm.
As shown in fig. 4, the electric control system 3 is a floor type electric control cabinet, the electric control system is divided into a power system and a control system, a power circuit is 380V and 50HZ, and is responsible for starting, stopping and protecting an oil pump motor, a button and an electromagnetic valve adopt DC24V to control a power supply, and an alternating current contactor controls the voltage to be AC 220V; the electrical control cabinet adopts a double-door cabinet, and enough wires and space are reserved in the cabinet so as to facilitate replacement and element addition of users; the touch screen is connected with the button operation station through the cantilever support system, the operation panel is a comfortable operation panel, the operation direction can be adjusted randomly, and the multidirectional operation requirement of a user is met.
The electrical control system comprises a PLC (programmable logic controller) which is respectively connected with a displacement photoelectric switch, a servo motor, a driver control element (a selection switch and a button), a switching power supply, a displacement sensor, a pressure sensor, an industrial touch screen, a control cabinet and an operation panel, adopts a man-machine conversation 'menu type' operation mode, can realize the circulation and data recording and setting of various process actions of the equipment by compiling special control software according to process requirements, adopts the main control of the PLC, and carries out digital display and setting processing of various data by the touch screen; the man-machine interactive picture can carry out digital presetting on pressure, tonnage and time parameters on the touch screen very conveniently, clearly display the working pressure, tonnage, temperature and time parameters of the equipment, and simultaneously display pressure-time and temperature-time curves; the whole operation is simple. The press can realize two working modes of adjustment and single circulation by button centralized control, the pressing period can be adjusted according to the pressing process, the press can be designed according to the requirements of users, the control on the pressure and the displacement of the hydraulic actuating element, namely the oil cylinder can be realized, and the production process of the equipment can be further completed. The control system has corresponding self-diagnosis function, can display the working information and common faults of the press machine on a silver screen, and is provided with an equipment fault alarm system.
As shown in fig. 5 and 6, the microwave heating system 5 includes: 5-1 parts of microwave source, 5-2 parts of circulator, 5-3 parts of three-pin regulator, 5-4 parts of waveguide, 5-5 parts of waveguide feed port (left and right), 5-6 parts of waveguide sealing piece, 5-7 parts of temperature measuring system, 5-8 parts of energy leakage detection, 5-9 parts of microwave heating control system, 5-10 parts of microwave heating cavity and 5-11 parts of cooling system; microwave energy for heating materials generated by a microwave source is emitted by a magnetron, certain voltage and current are applied to the inside of the magnetron, the microwave energy sequentially passes through a bidirectional directional coupler (for collecting microwave incident and reflected power signals), a circulator (for isolating microwave reflected energy), a three-pin regulator (for inhibiting and regulating the stable operation of a standing wave auxiliary system) and a low-loss transmission waveguide which are connected with each other in a flange mode on a material feeding path, and finally the microwave energy is fed into a heating cavity through a gap of a crack antenna through a waveguide feed port to heat the materials, a temperature measuring system is arranged in the heating cavity in a sealing mode through a temperature sensor, the temperature change of the heated materials is monitored in real time, and meanwhile, the temperature change data is transmitted to a microwave heating control system in real time, and the microwave heating temperature range is as follows: 0-140 ℃ for 2 minutes.
The microwave heating control system carries out remote manual or intelligent control on the microwave source, the microwave reflection signal, the temperature measurement system and the cooling system by acquiring and sending a switch number and communication data, so that the reliable operation of the microwave heating device is guaranteed. The microwave source and the microwave heating system can generate higher temperature rise when high-power microwave heating is carried out, and in order to ensure that the microwave heating device is not influenced by the overhigh temperature rise, the whole-course temperature reduction needs to be carried out on the two heat sources through the cooling system, so that the two heat sources can work stably.
The microwave heating cavity and the external free space should realize good microwave shielding, and the microwave leakage quantity of the microwave radiation sanitary standard of the operation place is less than or equal to 5mW/cm according to the GB10436-89 requirement 2 (ii) a Therefore, the installation, closing and connection process of the microwave heating device to the external free space needs to be carried out for possible microwave leakageA microwave sealing element is arranged at the position of the gap, the microwave crack antenna and the feed port are embedded in the main machine structure of the testing machine, and the lower heat conduction fixing plate, the microwave crack antenna and the microwave breach are integrated to keep the sealing performance and prevent leakage; microwave leakage can be caused by lateral pressure at two sides, and the microwave leakage is realized in the sealed cavity; in order to detect the microwave sealing effect, energy leakage instruments are arranged at the positions of a microwave source, a microwave system device and a microwave heating cavity for real-time energy leakage detection, so that operators are prevented from being damaged by microwaves.
The materials are sent to a heating box, at the moment, moisture in the materials is evaporated under the action of microwave energy, and the materials are discharged out of the heater through a moisture discharging system to achieve the drying purpose. The system is characterized by comprising a series of automatic controls consisting of a Programmable Logic Controller (PLC), a human-computer interface and the like, a temperature control system, a material shortage or other alarm systems and the like. The microwave heating inner cavity 10 is made of 304# stainless steel, and the equipment outer covering plate is made of 304# stainless steel. The top is provided with a ventilation and dehumidification flange and an air box cover, a user is connected with a centrifugal fan pipeline, the whole machine is controlled by a control console, convenience and simplicity are realized, and the product pressing is finished by five processes of prepressing, heating and softening, heating and curing, and maintaining pressure and cooling.
As shown in fig. 7, the mold temperature control device adopts an electric heating mold temperature controller, the heating temperature range is 0-230 ℃, the automatic temperature control of the heated object can be realized, the heat conducting oil is a heat carrier, and the heat energy is conveyed to the heat utilization equipment by forced circulation of a high-temperature circulating oil pump; then returning to the direct-flow heating equipment for heating again, and repeating the steps in such a way, realizing the continuous increment of heat, raising the temperature of the heated object and achieving the process requirement of constant heating temperature. The circulating oil pump is a megapump, a German Siemens motor is adopted, the quality is high, the noise is low, the flow is large, an intelligent control system is adopted, a heating system state flow chart can be displayed in real time, the intelligent control system is used for displaying and adjusting technical parameters such as equipment temperature and time, main technical parameters and curves of equipment, the running state (including on-off of each valve body), a help menu is displayed, and the intelligent control system has the functions of fault information display, current stage control, remote control and the like; the device can be set and operated by a customer conveniently, the device has the protection of pressure, over-temperature, automatic exhaust, a bypass loop, phase loss, phase failure, phase sequence and the like, a system pipeline adopts a special pipe for a GB3087 low-pressure boiler, and a 20# carbon steel pipeline is integrally formed by carbon steel, so that the system is reliable and does not leak oil. The heating tube is made of U-shaped flange stainless steel F321, a 1.6Mpa pressure test is carried out to ensure safety, and the lead is connected by a high-temperature flame-retardant lead.
When the heating device works, the heating modes are switched at any time through the on-off control of the two heating devices; or jointly open the control switches to realize the joint heating. The pressing of composite plates with different specifications requires different manufacturing processes, and the required heating mode is selected according to the process.
The above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims (10)
1. A hot pressing apparatus for bamboo and wood composite material, comprising: the system comprises a host system, a hydraulic servo system, an electrical control system, a mold temperature system, a microwave heating system, a safety system and a material conveying system; the hydraulic servo system, the die temperature system and the electric control system are installed and integrated on one side of the host system; the microwave heating system, the material conveying system and the safety system are respectively arranged on the inner side and the outer side of the host system, and the electric control system is connected with and controls the hydraulic servo system, the mold temperature system, the microwave heating system, the safety system and the material conveying system.
2. The bamboo and wood composite hot-pressing device according to claim 1, wherein the main machine structure comprises a ladder step, a main frame, a sealing plate, a sliding table, a hot plate, a hydraulic lifting mechanism, an upper maintenance platform, a lateral pressing mechanism, a main oil cylinder, a feeding door and an maintenance door; the upper maintenance platform is arranged above the main frame, and the ladder step is arranged on the side face of the main frame and is respectively connected with the main frame and the upper maintenance platform; the sealing plate is installed on the inner side of the main frame, the sliding table is installed below the sealing plate, the sealing plate is connected with the main frame and the sliding table through the installation sealing sheet and the shielding elastic sheet, the bottom of the sliding table is connected with the hot plate, the main oil cylinder and the sliding table are connected with the main frame through the locking device, the hydraulic lifting mechanism is installed on the inner side of the main frame and connected with the side pressing mechanism, and materials are fed into a working position in a main system through the feeding door.
3. The bamboo and wood composite hot-pressing device as claimed in claim 2, wherein the main frame is composed of four groups of upright columns, an upper mounting seat, a lower mounting seat and a movable workbench, the four groups of upright columns are welded by Q345 steel plates to form an H-shaped frame structure, and the upper and lower mounting seats and the movable workbench are composed of structural members welded by Q345 steel plates; the upper plane of the movable workbench is connected with a piston rod of the plunger oil cylinder, the lower plane of the movable workbench is connected with the heat insulation layer and the heat conduction plate, and the lower plane of the upper mounting seat is connected with the main oil cylinder fixing disc.
4. The bamboo wood composite hot pressing apparatus as claimed in claim 1, wherein the hydraulic servo system comprises: the hydraulic control system comprises an energy conversion device, a hydraulic control device, a main oil tank, an auxiliary oil tank and a hydraulic actuating mechanism; the main oil tank is arranged on the side face of the main engine, the auxiliary oil tank is arranged on the top of the main engine, the energy conversion device and the hydraulic control device are arranged on the upper plane of the main oil tank in order, and the hydraulic control device and the hydraulic actuating mechanism are connected with the oil tanks through pipelines.
5. The bamboo and wood composite hot-pressing device as claimed in claim 1 or 4, wherein the hydraulic servo system is provided with an independent oil liquid filtering and cooling device and an oil level and oil temperature alarm device, and a filter of an air device is arranged at an air port of an oil tank of the hydraulic servo system.
6. A bamboo and wood composite hot pressing device according to claim 1 or 4, wherein the rotation speed of a servo motor in the hydraulic servo system is controlled in a closed loop mode.
7. The bamboo and wood composite hot-pressing device as claimed in claim 1, wherein the electrical control device comprises a PLC programmable controller connected with a displacement photoelectric switch, a servo motor, a driver control element, a switching power supply, a displacement sensor, a pressure sensor, a touch screen, a control cabinet and an operation panel respectively, the PLC programmable controller is combined with a human-computer interface, and various process action cycles and data recording and setting of the device can be realized by programming special control software according to process requirements; the electric control system has a self-diagnosis function, can display the working information and common faults of the press on a silver screen, and is provided with an equipment fault alarm system.
8. The bamboo-wood composite hot pressing apparatus as claimed in claim 1, wherein the microwave heating means comprises: the device comprises a microwave source, a bidirectional directional coupler, a circulator, a three-pin regulator, a waveguide feed port, a waveguide microwave sealing piece, a temperature measuring system, energy leakage detection, a microwave heating control system, a microwave heating cavity and a cooling system; the microwave heating control system is respectively connected with and controls the microwave source, the temperature measuring system and the cooling system; the microwave source feeds microwave energy into the microwave heating cavity through a gap of the crack antenna by sequentially connecting the bidirectional directional coupler, the circulator, the three-pin adjuster and the low-loss transmission waveguide; the waveguide feed ports are arranged on the left and right of the slot antenna; and installing a microwave seal at the position of the gap with the microwave leakage.
9. The bamboo and wood composite hot-pressing equipment as claimed in claim 1 or 8, wherein the microwave heating cavity body frame is made of channel steel, and the box body shell shroud plate, the inner cavity and the bottom plate are all designed and manufactured by adopting a No. 304 stainless steel plate with the thickness of 1.5 mm; the microwave heating box is provided with a large-opening door and a single-door structure, leakage-proof inhibiting sheets are arranged on the periphery of the door and provided with a visual observation window, the door is provided with a safety switch device, microwave feed-in ports are arranged on two sides of the heating box, and the inlet ports are sealed by non-wave-absorbing materials; and a ventilation and dehumidification flange and an air box cover are reserved at the top of the microwave heating box body.
10. The bamboo and wood composite hot pressing device as claimed in claim 1, wherein the safety system comprises a sliding table safety locking device, and the access door is designed with an interlock switch, a pause button and an emergency stop button; the safety device is provided with a hydraulic support safety circuit; the safety device is provided with a hydraulic interlocking loop to ensure that the upper cavity of the main cylinder cannot be pressurized when the supporting safety valve is not opened.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210705386.0A CN114888909A (en) | 2022-06-21 | 2022-06-21 | Hot pressing equipment for bamboo and wood composite material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210705386.0A CN114888909A (en) | 2022-06-21 | 2022-06-21 | Hot pressing equipment for bamboo and wood composite material |
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| CN114888909A true CN114888909A (en) | 2022-08-12 |
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| CN202210705386.0A Pending CN114888909A (en) | 2022-06-21 | 2022-06-21 | Hot pressing equipment for bamboo and wood composite material |
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