CN117021683A - Cooling press for hot pressed high-pressure laminated board - Google Patents
Cooling press for hot pressed high-pressure laminated board Download PDFInfo
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- CN117021683A CN117021683A CN202311013838.XA CN202311013838A CN117021683A CN 117021683 A CN117021683 A CN 117021683A CN 202311013838 A CN202311013838 A CN 202311013838A CN 117021683 A CN117021683 A CN 117021683A
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- 238000001816 cooling Methods 0.000 title claims abstract description 146
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 319
- 238000003825 pressing Methods 0.000 claims abstract description 202
- 239000000498 cooling water Substances 0.000 claims abstract description 43
- 239000011148 porous material Substances 0.000 claims abstract description 25
- 238000007731 hot pressing Methods 0.000 claims abstract description 23
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 19
- 238000007599 discharging Methods 0.000 claims abstract description 17
- 239000002356 single layer Substances 0.000 claims abstract description 4
- 230000001105 regulatory effect Effects 0.000 claims description 65
- 230000000712 assembly Effects 0.000 claims description 12
- 238000000429 assembly Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 230000001502 supplementing effect Effects 0.000 claims description 10
- 230000001276 controlling effect Effects 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 9
- 239000000523 sample Substances 0.000 claims description 6
- 230000008646 thermal stress Effects 0.000 claims description 4
- 230000001174 ascending effect Effects 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000005265 energy consumption Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000123 paper Substances 0.000 description 4
- 238000004026 adhesive bonding Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003292 glue Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D31/00—Other cooling or freezing apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
- B31F1/0003—Shaping by bending, folding, twisting, straightening, flattening or rim-rolling; Shaping by bending, folding or rim-rolling combined with joining; Apparatus therefor
- B31F1/0035—Straightening or flattening
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/02—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Press Drives And Press Lines (AREA)
Abstract
The invention relates to a cooling press for a high-pressure laminated board after hot pressing, which comprises a cooling press main machine and a cooling system. The main machine of the cooling press is a single-layer press and comprises a frame, a main oil cylinder, an upper pressing plate, a lower pressing plate, a lifting cylinder, a balance cylinder, an upper pressing plate guide assembly, a guide rail assembly of a feeding and discharging device and an oil tank, wherein a cooling water pore canal loop is processed in the upper pressing plate and the lower pressing plate. The cooling system comprises a cooling circulation system of the water chilling unit and a secondary circulation system of the hot water temperature control unit group. The cooling system of the water chilling unit comprises a pressure stabilizing water tank, a water chilling unit circulating pump, a hot water thermometer, a water chilling unit temperature sensor, a water chilling thermometer, a cold water pipeline and a hot water pipeline. The hot water temperature control unit group secondary circulation system comprises an upper pressing plate secondary circulation system and a lower pressing plate secondary circulation system, so that the temperature of the upper pressing plate and the lower pressing plate is kept synchronously reduced and tends to be stable. The high-temperature plate is cooled in a pressurized state, so that buckling deformation is not generated, the energy consumption is reduced, the production period is shortened, and the production efficiency is improved.
Description
Technical Field
The invention belongs to the field of artificial board production, and particularly relates to a cooling press for a high-pressure laminated board after hot pressing.
Background
The high-pressure laminated board is a paper artificial board, commonly called fire-proof board or anti-multiple board, which is a board formed by using transparent paper and decorative paper impregnated with melamine resin glue as a surface layer and a decorative layer respectively, using kraft paper impregnated with phenolic resin glue as a base layer, and gluing under high-temperature and high-pressure conditions after assembly. The high-pressure laminated board has high density, smooth and clean surface and small thickness deviation, and sanding is not needed after hot pressing. Because the temperature of the high-pressure laminated board after hot pressing is higher, the high-pressure laminated board can not be directly stacked, cooling is needed, and the high-pressure laminated board can be stacked when the temperature is reduced to below 40 ℃, otherwise, the ageing of an adhesive and paper can be caused, and the performance of the board is reduced. However, the high-pressure laminated board after hot pressing is liable to cause warp deformation of the board during cooling in a natural state due to the residual thermal stress. Therefore, the sheet needs to be pressed during the cooling process after hot pressing of the high-pressure laminate to prevent the high-pressure laminate from buckling deformation. According to the technical characteristics, at present, a single hot press circulation mode is generally adopted when the high-pressure laminated board is produced, namely, a single hot press is used for completing the circulation modes of boosting, heating, maintaining pressure, preserving heat, pressurizing, cooling and reducing pressure to finish the production of products. The single hot press circulation mode has the advantage of lower initial equipment investment cost, but has a plurality of disadvantages: (1) Because the cooling medium is usually cold water, the heating medium of the hot press can only adopt steam with higher pressure and poorer thermal stability, but can not adopt heat conduction oil with better thermal stability and lower pressure; (2) The single hot press needs to be continuously heated and cooled in an alternating cycle, so that the cold-heat conversion time is longer, the production period is longer, and the production efficiency is lower. (3) When the temperature is raised, a large amount of heat energy is consumed, and when the temperature is lowered, a large amount of heat energy is lost, so that the heat energy loss is large. (4) In the periodical alternating processes of hot press gluing and pressurized cooling, the hot press plate needs to bear larger cold and hot alternating stress, so that the requirement on the hot press plate is higher.
Disclosure of Invention
In order to overcome the defects that a hot press for producing a high-pressure laminated board in a single hot press circulation mode cannot heat by adopting heat conduction oil, has low production efficiency and high heat energy loss, has high requirements on a hot press plate and the like, the invention provides a cooling press for the hot pressed high-pressure laminated board, which is specially used for carrying out pressurized cooling after the hot pressing of the high-pressure laminated board so as to prevent the high-pressure laminated board from buckling deformation in the cooling process.
In order to achieve the above purpose, the present invention adopts the following technical scheme: a cooling press for a high-pressure laminated board after hot pressing comprises a cooling press main machine and a cooling system;
the cooling press main machine is a single-layer press and comprises a frame 1, a main oil cylinder 2, an upper pressing plate 3, a lower pressing plate 4, a lifting cylinder 5, a balance cylinder 6, an upper pressing plate guide assembly 7, a feeding and discharging device guide rail assembly 8 and an oil tank 9; the frame 1 adopts a frame type structure and is composed of four frame groups, each frame group is formed by welding two frame pieces and a connecting piece, and the frame groups are connected into a whole through bolts; the four-row and two-column type hydraulic buffer structure comprises eight main oil cylinders 2, a frame group, a buffer heat insulation pad, a connecting piece and bolts, wherein the eight main oil cylinders 2 are of plunger type structures and are arranged on the upper part of the frame 1, two main oil cylinders 2 are arranged in each frame group in a rectangular array of four rows and two columns, the cylinder barrel end parts of the main oil cylinders 2 are arranged on the lower plane of an upper frame beam of the frame group, the plunger end parts of the main oil cylinders 2 are connected with the upper surface of an upper pressing plate 3 through the connecting piece and the bolts, and the buffer heat insulation pad is arranged between the plunger end parts and the upper pressing plate 3; the lower surface of the lower pressing plate 4 is arranged on the upper plane of the lower frame beam of the frame group, and a buffer heat insulation pad is also arranged between the lower pressing plate 4 and the lower frame beam of the frame group; the inner parts of the upper pressing plate 3 and the lower pressing plate 4 are respectively provided with the same pressing plate cooling water pore canal loop so as to be conveniently introduced with cooling water for circulating cooling; the four lifting cylinders 5 are of a single-rod double-acting piston type structure and are respectively arranged at four corners of the frame 1, cylinder barrels of the lifting cylinders 5 are fixed on upper frame beams of frame groups at the front end and the rear end of the frame 1, and piston rods of the lifting cylinders 5 are connected with the side faces of the upper pressing plate 3 through lug seats and pin shafts; the four balance cylinders 6 adopt a double-rod double-acting piston type structure, two balance cylinders are respectively arranged at the front end and the rear end of the stand 1 and are respectively positioned at four corners of the stand 1, cylinder barrels of the balance cylinders 6 are fixedly arranged at the outer sides of upper frame beams of frame groups at the two ends of the stand 1, and lower piston rods of the balance cylinders 6 are connected with the upper surface of the upper pressing plate 3 through lug seats and pin shafts; the two balance cylinders 6 are positioned on the diagonal of the frame 1, wherein the upper cavity and the lower cavity of one balance cylinder 6 are respectively communicated with the lower cavity and the upper cavity of the other balance cylinder 6 through oil pipes; when the upper pressure plate 3 descends, oil in the lower cavity of one balance cylinder 6 is extruded into the upper cavity of the other balance cylinder 6 on the diagonal line, so that four corners of the upper pressure plate 3 are displaced downwards in the same way; conversely, when the upper pressure plate 3 rises, the oil in the upper cavity of one balance cylinder 6 is extruded into the lower cavity of the other balance cylinder 6 on the diagonal line, so that the four corners of the upper pressure plate 3 are displaced upwards in the same way; the two sets of upper pressure plate guide assemblies 7 are arranged at the middle positions of the front end and the rear end of the stand 1 respectively, guide rods of the upper pressure plate guide assemblies 7 are vertically arranged, the lower ends of the guide rods are fixedly connected with the upper surface of the upper pressure plate 3, and guide wheels of the upper pressure plate guide assemblies 7 are fixed on the outer sides of upper frame beams of frame groups at the two ends of the stand 1;
further, the pressure plate cooling water pore canal loop adopts a split-area multi-loop mode, and cooling water is led into a plurality of areas of the upper pressure plate 3 and the lower pressure plate 4 simultaneously in a multi-way mode to synchronously cool so as to improve the cooling speed and ensure the uniformity of the surface temperatures of the upper pressure plate 3 and the lower pressure plate 4;
further, the oil tank 9 is mounted at the top of the frame 1, and comprises two oil tank bodies, a motor, an oil pump, various hydraulic control valves and an air filter, and is connected with the main oil cylinder 2, the lifting cylinder 5 and the balance cylinder 6 through oil pipes to form a hydraulic control loop system of the cooling press main machine, so that the main oil cylinder 2 is controlled to be closed and pressurized, the lifting cylinder 5 is controlled to be opened, the balance cylinder 6 is controlled to be opened, the upper pressing plate 3 is stably lifted, and the quick closing, pressurizing, pressure maintaining, pressure relief and opening of the cooling press main machine are realized;
further, the two sets of guide rail assemblies 8 of the feeding and discharging device are respectively positioned at two sides of the lower pressing plate 4 and are connected with the lower frame beams of the frame group of the rack 1 for supporting the feeding and discharging device;
the cooling system comprises a cooling circulation system of a water chilling unit and a secondary circulation system of a hot water temperature control unit group;
the cooling system of the water chiller comprises a pressure stabilizing water tank 10, a water chiller circulating pump 11, a hot water thermometer 12, a water chiller 13, a water chiller temperature sensor 14, a water chiller thermometer 15, a cold water pipeline 16, a hot water pipeline 17 and a water supplementing valve 32; the outlet of the water chiller 13 is connected with a cold water pipeline 16, the inlet of the water chiller 13 is connected with a hot water pipeline 17, the water chiller circulating pump 11 is connected on the hot water pipeline 17 in series, and the inlet of the pressure stabilizing water tank 10 is connected with the inlet of the water chiller circulating pump 11; the inlet of the pressure stabilizing water tank 10 is also connected with a water supplementing valve 32, and the water supplementing valve 32 is connected with an external water source so as to supplement water for the cooling system; when the cooling system needs water replenishment, the water replenishment valve 32 is opened, and when the water replenishment is not needed, the water replenishment valve 32 is closed; the inlet of the water chiller 13 is provided with a hot water thermometer 12 for displaying the temperature of hot water input into the water chiller 13; the outlet of the water chiller 13 is respectively provided with a water chiller temperature sensor 14 and a water chiller temperature meter 15, wherein the water chiller temperature sensor 14 is used for measuring and controlling the water chiller temperature output by the water chiller 13, and the water chiller temperature meter 15 is used for displaying the water chiller temperature output by the water chiller 13;
the hot water temperature control unit group secondary circulation system comprises an upper pressure plate secondary circulation system and a lower pressure plate secondary circulation system, and the configuration and connection modes of the upper pressure plate secondary circulation system and the lower pressure plate secondary circulation system are the same;
the upper pressure plate secondary circulation system comprises an upper pressure plate electric three-way regulating valve 18, an upper pressure plate circulating pump 19, an upper pressure plate temperature sensor 20, an upper pressure plate water inlet thermometer 21, an upper pressure plate water inlet pipeline 22, an upper pressure plate water return pipeline 23 and an upper pressure plate circulating connecting pipe 24; the upper pressure plate electric three-way regulating valve 18 is provided with an inlet a, an outlet b and an outlet c, wherein the inlet a is connected with the cold water pipeline 16, the outlet b is connected with the inlet of the upper pressure plate circulating pump 19, and the outlet c is connected with the upper pressure plate water return pipeline 23; the outlet of the upper pressing plate circulating pump 19 is connected with an upper pressing plate water inlet pipeline 22 and communicated with a pressing plate cooling water pore canal loop in the upper pressing plate 3; the probe of the upper platen temperature sensor 20 is installed inside the upper platen 3 for measuring and controlling the temperature of the upper platen 3; the upper pressure plate water inlet thermometer 21 is connected to the inlet of the upper pressure plate circulating pump 19 and is used for displaying the water inlet temperature of the upper pressure plate 3; one end of the upper pressing plate circulating connecting pipe 24 is connected with the outlet b, the other end of the upper pressing plate circulating connecting pipe is connected with the upper pressing plate water return pipeline 23, and the upper pressing plate circulating connecting pipe is communicated with a pressing plate cooling water pore channel loop in the upper pressing plate 3; the upper pressing plate water return pipeline 23 is connected with the hot water pipeline 17;
the lower pressure plate secondary circulation system comprises a lower pressure plate electric three-way regulating valve 25, a lower pressure plate circulating pump 26, a lower pressure plate temperature sensor 27, a lower pressure plate water inlet thermometer 28, a lower pressure plate water inlet pipeline 29, a lower pressure plate water return pipeline 30 and a lower pressure plate circulating connecting pipe 31; the lower pressure plate electric three-way regulating valve 25 is provided with an inlet d, an outlet e and an outlet f, wherein the inlet d is connected with the cold water pipeline 16, the outlet e is connected with the inlet of the lower pressure plate circulating pump 26, and the outlet f is connected with the lower pressure plate water return pipeline 30; the outlet of the lower pressure plate circulating pump 26 is connected with a lower pressure plate water inlet pipeline 29 and communicated with a pressure plate cooling water pore channel loop in the lower pressure plate 4; the probe of the lower platen temperature sensor 27 is installed inside the lower platen 4 for measuring and controlling the temperature of the lower platen 4; the lower pressure plate water inlet thermometer 28 is connected to the inlet of the lower pressure plate circulating pump 26 and is used for displaying the water inlet temperature of the lower pressure plate 4; one end of the lower pressure plate circulating connecting pipe 31 is connected with the outlet e, the other end of the lower pressure plate circulating connecting pipe is connected with the lower pressure plate water return pipeline 30, and the lower pressure plate circulating connecting pipe is communicated with a pressure plate cooling water pore channel loop in the lower pressure plate 4; the lower platen return water line 30 is connected to the hot water line 17.
The working method of the cooling press comprises the following steps:
after the hot pressing of the high-pressure laminated board is finished, the high-pressure laminated board is discharged from a hot press through a feeding and discharging device and is fed into a neutral space between an upper pressing plate 3 and a lower pressing plate 4 of a main machine of the cooling press, a hydraulic control loop system of the main machine of the cooling press is started, oil is fed into a main oil cylinder 2, a plunger of the main oil cylinder 2 stretches out to drive the upper pressing plate 3 to descend, the main machine of the cooling press is closed and pressurized until the pressure reaches a preset value, oil supply to the main oil cylinder 2 is stopped, and the high-pressure laminated board enters a pressure maintaining stage, and heat is transferred to the upper pressing plate 3 and the lower pressing plate 4 through contact heat transfer;
step 2, starting a cooling system, namely regulating the opening of an inlet a of an upper pressure plate electric three-way regulating valve 18 to be maximum, regulating the opening of an outlet b to be maximum, regulating the opening of an inlet e of a lower pressure plate electric three-way regulating valve 25 to be maximum, regulating the opening of an outlet d to be maximum, and regulating the opening of an outlet f to be closed, starting a cold water machine circulating pump 11, an upper pressure plate circulating pump 19 and a lower pressure plate circulating pump 26, so that cooling water in the cooling system circularly flows, and cold water output by a cold water machine 13 is respectively transmitted to the upper pressure plate electric three-way regulating valve 18 and the lower pressure plate electric three-way regulating valve 25 in two ways through a cold water pipeline 16; one path of cold water enters a pressure plate cooling water channel loop in the upper pressure plate 3 through an outlet b of the upper pressure plate electric three-way regulating valve 18, an upper pressure plate circulating pump 19 and an upper pressure plate water inlet pipeline 22, absorbs heat of the upper pressure plate 3 and becomes hot water, and then is discharged through an upper pressure plate water return pipeline 23 and enters a hot water pipeline 17; meanwhile, the other path of cold water enters a pressure plate cooling water channel loop in the lower pressure plate 4 through an outlet e of the lower pressure plate electric three-way regulating valve 25, a lower pressure plate circulating pump 26 and a lower pressure plate water inlet pipeline 29, absorbs heat of the lower pressure plate 4 and becomes hot water, and then is discharged through a lower pressure plate water return pipeline 30 and enters a hot water pipeline 17; hot water in the hot water pipeline 17 is conveyed to the cold water machine 13 for cooling through the cold water machine circulating pump 11, and is conveyed to the upper pressing plate electric three-way regulating valve 18 and the lower pressing plate electric three-way regulating valve 25 through the cold water pipeline 16 again respectively, so that the circulating cooling of the upper pressing plate 3 and the lower pressing plate 4 is realized, and the high-temperature high-pressure laminated plate is gradually cooled under the pressurized state; in the cooling circulation process, the water pressure of the cooling system is changed due to the change of the water temperature, the pressure stabilizing water tank 10 can keep the water pressure in the cooling system stable, when the water pressure in the cooling system is increased, high-pressure water enters the pressure stabilizing water tank 10, and when the water pressure in the cooling system is reduced, the high-pressure water in the pressure stabilizing water tank 10 is discharged, so that the water pressure in the cooling system is stabilized;
step 3, in the circulating cooling process, the temperatures of the upper pressing plate 3 and the lower pressing plate 4 are synchronously reduced and kept consistent by respectively adjusting the flow of cold water entering the upper pressing plate 3 and the lower pressing plate 4; when the temperature of the upper pressing plate 3 is lower than that of the lower pressing plate 4, the opening of the outlet b of the upper pressing plate electric three-way regulating valve 18 is controlled to be smaller, the opening of the outlet c is controlled to be larger, the flow rate of cold water entering the upper pressing plate 3 is reduced, the cooling speed of the upper pressing plate 3 is reduced, and the temperature of the upper pressing plate 3 is consistent with that of the lower pressing plate 4; conversely, when the temperature of the lower pressing plate 4 is lower than the temperature of the upper pressing plate 3, the opening of the outlet e of the electric three-way regulating valve 25 of the lower pressing plate is controlled to be smaller, the opening of the outlet f is controlled to be larger, the flow rate of cold water entering the lower pressing plate 4 is reduced, the cooling speed of the lower pressing plate 4 is reduced, and the temperature of the lower pressing plate 4 is consistent with the temperature of the upper pressing plate 3; thereby keeping the temperature of the upper pressing plate 3 and the lower pressing plate 4 synchronously reduced and consistent, keeping the temperature of the upper surface and the lower surface of the high-temperature high-pressure laminated plate synchronously reduced, and avoiding generating thermal stress;
step 4, when the temperatures of the upper pressing plate 3 and the lower pressing plate 4 are reduced to a preset temperature of 15 ℃, the outlet b of the upper pressing plate electric three-way regulating valve 18 and the outlet e of the lower pressing plate electric three-way regulating valve 25 are closed, and meanwhile, the circulating pump 11 of the water chiller stops working, and cooling water in a cooling circulating system of the water chiller stops flowing; the upper pressing plate circulating pump 19 and the lower pressing plate circulating pump 26 continue to work, so that water in a pressing plate cooling water pore path loop in the upper pressing plate 3 and water in a pressing plate cooling water pore path loop in the lower pressing plate 4 are respectively circulated in a closed mode, the temperature of the high-pressure laminated plate is further reduced and tends to be stable until the preset cooling time is over, and the temperature of the high-pressure laminated plate is lower than 40 ℃; the preset cooling time is smaller than the hot pressing time, and the preset cooling time is set according to the thickness of the high-pressure laminated board;
step 5, when the preset cooling time is over, the main oil cylinder 2 of the main cooling press machine is depressurized, an oil return channel is opened, the lifting cylinder 5 works to enable the upper pressing plate 3 to ascend, the plunger of the main oil cylinder 2 ascends along with the ascending, oil in the main oil cylinder 2 returns to the oil tank 9, the main cooling press machine is opened, and the pressurizing and cooling are finished;
and 6, delivering the pressurized and cooled high-pressure laminated board out of the cooling press main machine through the feeding and discharging device, stacking, delivering the next hot-pressed high-pressure laminated board into the cooling press main machine, and pressurizing and cooling again.
The invention has the beneficial effects that:
(1) The special cooling press is adopted to carry out pressurized cooling on the high-pressure laminated board after hot pressing, the hot press can adopt heat conduction oil as a heating medium, the stability of hot pressing temperature is improved, the quality of hot pressing gluing is ensured, and meanwhile, the pressure-bearing requirement of a heating medium pipeline is reduced.
(2) Shortens the production period of the high-voltage laminated board and improves the production efficiency.
(3) The heat energy loss is avoided, and the energy loss is reduced.
(4) The hot press plate does not need to be cooled down, and the influence of frequent cold-hot alternating stress on the service life of the hot press plate is eliminated.
Drawings
Fig. 1 is a three-dimensional block diagram of a cooling press host machine of the present invention.
Fig. 2 is an elevation view of a cooling press mainframe of the present invention.
FIG. 3 is a schematic diagram of a platen cooling water tunnel circuit for cooling a press master of the present invention.
Fig. 4 is a schematic diagram of the cooling system of the cooling press of the present invention.
In the figure, a 1-frame, a 2-main oil cylinder, a 3-upper pressing plate, a 4-lower pressing plate, a 5-lifting cylinder, a 6-balance cylinder, a 7-upper pressing plate guide assembly, an 8-feeding and discharging guide rail assembly and a 9-oil tank are arranged;
the water heater comprises a 10-pressure-stabilizing water tank, an 11-cold water machine circulating pump, a 12-hot water thermometer, a 13-cold water machine, a 14-cold water machine temperature sensor, a 15-cold water thermometer, a 16-cold water pipeline, a 17-hot water pipeline and a 32-water supplementing valve;
the device comprises an 18-upper pressure plate electric three-way regulating valve, a 19-upper pressure plate circulating pump, a 20-upper pressure plate temperature sensor, a 21-upper pressure plate water inlet thermometer, a 22-upper pressure plate water inlet pipeline, a 23-upper pressure plate water return pipeline and a 24-upper pressure plate circulating connecting pipe;
25-lower pressure plate electric three-way regulating valve, 26-lower pressure plate circulating pump, 27-lower pressure plate temperature sensor, 28-lower pressure plate water inlet thermometer, 29-lower pressure plate water inlet pipeline, 30-lower pressure plate water return pipeline and 31-lower pressure plate circulating connecting pipe.
Detailed Description
Embodiments of the present invention will be further described with reference to fig. 1 to 4.
A cooling press for a high-pressure laminated board after hot pressing comprises a cooling press main machine and a cooling system;
the cooling press main machine is a single-layer press and comprises a frame 1, a main oil cylinder 2, an upper pressing plate 3, a lower pressing plate 4, a lifting cylinder 5, a balance cylinder 6, an upper pressing plate guide assembly 7, a feeding and discharging device guide rail assembly 8 and an oil tank 9; the frame 1 adopts a frame type structure and consists of four frame groups, each frame group is formed by welding two frame pieces and a connecting piece, and the frame groups are connected into a whole through bolts; the four-row and two-column type hydraulic buffer structure comprises eight main oil cylinders 2, a frame group, a buffer heat insulation pad, a connecting piece and bolts, wherein the eight main oil cylinders 2 are in a plunger type structure and are arranged at the upper part of the frame 1, two main oil cylinders 2 are arranged in each frame group in a rectangular array of four rows and two columns, the cylinder barrel end parts of the main oil cylinders 2 are arranged on the lower plane of an upper frame beam of the frame group, the plunger end parts of the main oil cylinders 2 are connected with the upper surface of an upper pressing plate 3 through the connecting piece and the bolts, and the buffer heat insulation pad is arranged between the plunger end parts and the upper pressing plate 3; the lower surface of the lower pressing plate 4 is arranged on the upper plane of the lower frame beam of the frame group, and a buffer heat insulation pad is also arranged between the lower pressing plate 4 and the lower frame beam of the frame group; the inner parts of the upper pressing plate 3 and the lower pressing plate 4 are respectively provided with the same pressing plate cooling water pore canal loop so as to be conveniently introduced with cooling water for circulating cooling; the four lifting cylinders 5 are respectively arranged at four corners of the frame 1 by adopting a single-rod double-acting piston structure, cylinder barrels of the lifting cylinders 5 are fixed on upper frame beams of frame groups at the front end and the rear end of the frame 1, and piston rods of the lifting cylinders 5 are connected with the side surfaces of the upper pressing plate 3 through lug seats and pin shafts; the four balance cylinders 6 adopt a double-rod double-acting piston type structure, two balance cylinders are respectively arranged at the front end and the rear end of the stand 1 and are respectively positioned at four corners of the stand 1, cylinder barrels of the balance cylinders 6 are fixedly arranged at the outer sides of upper frame beams of frame groups at the two ends of the stand 1, and lower piston rods of the balance cylinders 6 are connected with the upper surface of the upper pressing plate 3 through lug seats and pin shafts; the two balance cylinders 6 are positioned on the diagonal of the frame 1, wherein the upper cavity and the lower cavity of one balance cylinder 6 are respectively communicated with the lower cavity and the upper cavity of the other balance cylinder 6 through oil pipes; when the upper pressure plate 3 descends, oil in the lower cavity of one balance cylinder 6 is extruded into the upper cavity of the other balance cylinder 6 on the diagonal line, so that four corners of the upper pressure plate 3 are displaced downwards in the same way; conversely, when the upper pressure plate 3 rises, the oil in the upper cavity of one balance cylinder 6 is extruded into the lower cavity of the other balance cylinder 6 on the diagonal line, so that the four corners of the upper pressure plate 3 are displaced upwards in the same way; the two sets of upper pressure plate guide assemblies 7 are arranged at the middle positions of the front end and the rear end of the stand 1 respectively, guide rods of the upper pressure plate guide assemblies 7 are vertically arranged, the lower ends of the guide rods are fixedly connected with the upper surface of the upper pressure plate 3, and guide wheels of the upper pressure plate guide assemblies 7 are fixed on the outer sides of upper frame beams of frame groups at the two ends of the stand 1;
further, the pressure plate cooling water pore canal loop adopts a split-area multi-loop mode, and cooling water is led into a plurality of areas of the upper pressure plate 3 and the lower pressure plate 4 simultaneously in a multi-way mode to synchronously cool so as to improve the cooling speed and ensure the uniformity of the surface temperatures of the upper pressure plate 3 and the lower pressure plate 4;
further, the oil tank 9 is mounted at the top of the frame 1, and comprises two oil tank bodies, a motor, an oil pump, various hydraulic control valves and an air filter, and is connected with the main oil cylinder 2, the lifting cylinder 5 and the balance cylinder 6 through oil pipes to form a hydraulic control loop system of the cooling press main machine, so that the main oil cylinder 2 is controlled to be closed and pressurized, the lifting cylinder 5 is controlled to be opened, the balance cylinder 6 is controlled to be opened, the upper pressing plate 3 is stably lifted, and the quick closing, pressurizing, pressure maintaining, pressure relief and opening of the cooling press main machine are realized;
further, two sets of guide rail assemblies 8 of the feeding and discharging device are arranged on two sides of the lower pressing plate 4 respectively, are connected with the lower frame beams of the frame group of the stand 1 and are used for supporting the feeding and discharging device;
the cooling system comprises a cooling circulation system of a water chilling unit and a secondary circulation system of a hot water temperature control unit group;
the cooling system of the water chiller comprises a pressure stabilizing water tank 10, a water chiller circulating pump 11, a hot water thermometer 12, a water chiller 13, a water chiller temperature sensor 14, a water chiller thermometer 15, a cold water pipeline 16, a hot water pipeline 17 and a water supplementing valve 32; the outlet of the water chiller 13 is connected with a cold water pipeline 16, the inlet of the water chiller 13 is connected with a hot water pipeline 17, the water chiller circulating pump 11 is connected on the hot water pipeline 17 in series, and the inlet of the pressure stabilizing water tank 10 is connected with the inlet of the water chiller circulating pump 11; the inlet of the pressure stabilizing water tank 10 is also connected with a water supplementing valve 32, and the water supplementing valve 32 is connected with an external water source so as to supplement water for the cooling system; when the cooling system needs water replenishment, the water replenishment valve 32 is opened, and when the water replenishment is not needed, the water replenishment valve 32 is closed; the inlet of the water chiller 13 is provided with a hot water thermometer 12 for displaying the temperature of hot water input into the water chiller 13; the outlet of the water chiller 13 is respectively provided with a water chiller temperature sensor 14 and a water chiller temperature meter 15, wherein the water chiller temperature sensor 14 is used for measuring and controlling the water chiller temperature output by the water chiller 13, and the water chiller temperature meter 15 is used for displaying the water chiller temperature output by the water chiller 13;
the hot water temperature control unit group secondary circulation system comprises an upper pressure plate secondary circulation system and a lower pressure plate secondary circulation system, and the configuration and connection modes of the upper pressure plate secondary circulation system and the lower pressure plate secondary circulation system are the same;
the upper pressure plate secondary circulation system comprises an upper pressure plate electric three-way regulating valve 18, an upper pressure plate circulating pump 19, an upper pressure plate temperature sensor 20, an upper pressure plate water inlet thermometer 21, an upper pressure plate water inlet pipeline 22, an upper pressure plate water return pipeline 23 and an upper pressure plate circulating connecting pipe 24; the upper pressure plate electric three-way regulating valve 18 is provided with an inlet a, an outlet b and an outlet c, wherein the inlet a is connected with the cold water pipeline 16, the outlet b is connected with the inlet of the upper pressure plate circulating pump 19, and the outlet c is connected with the upper pressure plate water return pipeline 23; the outlet of the upper pressing plate circulating pump 19 is connected with an upper pressing plate water inlet pipeline 22 and communicated with a pressing plate cooling water pore canal loop in the upper pressing plate 3; the probe of the upper platen temperature sensor 20 is installed inside the upper platen 3 for measuring and controlling the temperature of the upper platen 3; the upper pressure plate water inlet thermometer 21 is connected to the inlet of the upper pressure plate circulating pump 19 and is used for displaying the water inlet temperature of the upper pressure plate 3; one end of the upper pressing plate circulating connecting pipe 24 is connected with the outlet b, the other end of the upper pressing plate circulating connecting pipe is connected with the upper pressing plate water return pipeline 23, and the upper pressing plate circulating connecting pipe is communicated with a pressing plate cooling water pore channel loop in the upper pressing plate 3; the upper pressing plate water return pipeline 23 is connected with the hot water pipeline 17;
the lower pressure plate secondary circulation system comprises a lower pressure plate electric three-way regulating valve 25, a lower pressure plate circulating pump 26, a lower pressure plate temperature sensor 27, a lower pressure plate water inlet thermometer 28, a lower pressure plate water inlet pipeline 29, a lower pressure plate water return pipeline 30 and a lower pressure plate circulating connecting pipe 31; the lower pressure plate electric three-way regulating valve 25 is provided with an inlet d, an outlet e and an outlet f, wherein the inlet d is connected with the cold water pipeline 16, the outlet e is connected with the inlet of the lower pressure plate circulating pump 26, and the outlet f is connected with the lower pressure plate water return pipeline 30; the outlet of the lower pressure plate circulating pump 26 is connected with a lower pressure plate water inlet pipeline 29 and communicated with a pressure plate cooling water pore channel loop in the lower pressure plate 4; the probe of the lower platen temperature sensor 27 is installed inside the lower platen 4 for measuring and controlling the temperature of the lower platen 4; the lower pressure plate water inlet thermometer 28 is connected to the inlet of the lower pressure plate circulating pump 26 and is used for displaying the water inlet temperature of the lower pressure plate 4; one end of the lower pressure plate circulating connecting pipe 31 is connected with the outlet e, the other end of the lower pressure plate circulating connecting pipe is connected with the lower pressure plate water return pipeline 30, and the lower pressure plate circulating connecting pipe is communicated with a pressure plate cooling water pore channel loop in the lower pressure plate 4; the lower platen return water line 30 is connected to the hot water line 17.
The working method of the cooling press comprises the following steps:
after the hot pressing of the high-pressure laminated board is finished, the high-pressure laminated board is discharged from a hot press through a feeding and discharging device and is fed into a neutral space between an upper pressing plate 3 and a lower pressing plate 4 of a main machine of the cooling press, a hydraulic control loop system of the main machine of the cooling press is started, oil is fed into a main oil cylinder 2, a plunger of the main oil cylinder 2 stretches out to drive the upper pressing plate 3 to descend, the main machine of the cooling press is closed and pressurized until the pressure reaches a preset value, oil supply to the main oil cylinder 2 is stopped, and the high-pressure laminated board enters a pressure maintaining stage, and heat is transferred to the upper pressing plate 3 and the lower pressing plate 4 through contact heat transfer;
step 2, starting a cooling system, namely regulating the opening of an inlet a of an upper pressure plate electric three-way regulating valve 18 to be maximum, regulating the opening of an outlet b to be maximum, regulating the opening of an inlet e of a lower pressure plate electric three-way regulating valve 25 to be maximum, regulating the opening of an outlet d to be maximum, and regulating the opening of an outlet f to be closed, starting a cold water machine circulating pump 11, an upper pressure plate circulating pump 19 and a lower pressure plate circulating pump 26, so that cooling water in the cooling system circularly flows, and cold water output by a cold water machine 13 is respectively transmitted to the upper pressure plate electric three-way regulating valve 18 and the lower pressure plate electric three-way regulating valve 25 in two ways through a cold water pipeline 16; one path of cold water enters a pressure plate cooling water channel loop in the upper pressure plate 3 through an outlet b of the upper pressure plate electric three-way regulating valve 18, an upper pressure plate circulating pump 19 and an upper pressure plate water inlet pipeline 22, absorbs heat of the upper pressure plate 3 and becomes hot water, and then is discharged through an upper pressure plate water return pipeline 23 and enters a hot water pipeline 17; meanwhile, the other path of cold water enters a pressure plate cooling water channel loop in the lower pressure plate 4 through an outlet e of the lower pressure plate electric three-way regulating valve 25, a lower pressure plate circulating pump 26 and a lower pressure plate water inlet pipeline 29, absorbs heat of the lower pressure plate 4 and becomes hot water, and then is discharged through a lower pressure plate water return pipeline 30 and enters a hot water pipeline 17; hot water in the hot water pipeline 17 is conveyed to the cold water machine 13 for cooling through the cold water machine circulating pump 11, and is conveyed to the upper pressing plate electric three-way regulating valve 18 and the lower pressing plate electric three-way regulating valve 25 through the cold water pipeline 16 again respectively, so that the circulating cooling of the upper pressing plate 3 and the lower pressing plate 4 is realized, and the high-temperature high-pressure laminated plate is gradually cooled under the pressurized state; in the cooling circulation process, the water pressure of the cooling system is changed due to the change of the water temperature, the pressure stabilizing water tank 10 can keep the water pressure in the cooling system stable, when the water pressure in the cooling system is increased, high-pressure water enters the pressure stabilizing water tank 10, and when the water pressure in the cooling system is reduced, the high-pressure water in the pressure stabilizing water tank 10 is discharged, so that the water pressure in the cooling system is stabilized;
step 3, in the circulating cooling process, the temperatures of the upper pressing plate 3 and the lower pressing plate 4 are synchronously reduced and kept consistent by respectively adjusting the flow of cold water entering the upper pressing plate 3 and the lower pressing plate 4; when the temperature of the upper pressing plate 3 is lower than that of the lower pressing plate 4, the opening of the outlet b of the upper pressing plate electric three-way regulating valve 18 is controlled to be smaller, the opening of the outlet c is controlled to be larger, the flow rate of cold water entering the upper pressing plate 3 is reduced, the cooling speed of the upper pressing plate 3 is reduced, and the temperature of the upper pressing plate 3 is consistent with that of the lower pressing plate 4; conversely, when the temperature of the lower pressing plate 4 is lower than the temperature of the upper pressing plate 3, the opening of the outlet e of the electric three-way regulating valve 25 of the lower pressing plate is controlled to be smaller, the opening of the outlet f is controlled to be larger, the flow rate of cold water entering the lower pressing plate 4 is reduced, the cooling speed of the lower pressing plate 4 is reduced, and the temperature of the lower pressing plate 4 is consistent with the temperature of the upper pressing plate 3; thereby keeping the temperature of the upper pressing plate 3 and the lower pressing plate 4 synchronously reduced and consistent, keeping the temperature of the upper surface and the lower surface of the high-temperature high-pressure laminated plate synchronously reduced, and avoiding generating thermal stress;
step 4, when the temperatures of the upper pressing plate 3 and the lower pressing plate 4 are reduced to a preset temperature of 15 ℃, the outlet b of the upper pressing plate electric three-way regulating valve 18 and the outlet e of the lower pressing plate electric three-way regulating valve 25 are closed, and meanwhile, the circulating pump 11 of the water chiller stops working, and cooling water in a cooling circulating system of the water chiller stops flowing; the upper pressing plate circulating pump 19 and the lower pressing plate circulating pump 26 continue to work, so that water in a pressing plate cooling water pore path loop in the upper pressing plate 3 and water in a pressing plate cooling water pore path loop in the lower pressing plate 4 are respectively circulated in a closed mode, the temperature of the high-pressure laminated plate is further reduced and tends to be stable until the preset cooling time is over, and the temperature of the high-pressure laminated plate is lower than 40 ℃; the preset cooling time is smaller than the hot pressing time, and the preset cooling time is set according to the thickness of the high-pressure laminated board;
step 5, when the preset cooling time is over, the main oil cylinder 2 of the main cooling press machine is depressurized, an oil return channel is opened, the lifting cylinder 5 works to enable the upper pressing plate 3 to ascend, the plunger of the main oil cylinder 2 ascends along with the ascending, oil in the main oil cylinder 2 returns to the oil tank 9, the main cooling press machine is opened, and the pressurizing and cooling are finished;
and 6, delivering the pressurized and cooled high-pressure laminated board out of the cooling press main machine through the feeding and discharging device, stacking, delivering the next hot-pressed high-pressure laminated board into the cooling press main machine, and pressurizing and cooling again.
The above is one of the embodiments of the present invention, however, one of ordinary skill in the art can make the solution without departing from the scope of the present invention.
It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. Other embodiments, which are derived by a person skilled in the art based on the embodiments of the invention, are within the scope of the protection of the invention.
Claims (5)
1. The cooling press after hot pressing of the high-pressure laminated board is characterized by comprising a cooling press main machine and a cooling system;
the cooling press main machine is a single-layer press and comprises a frame (1), a main oil cylinder (2), an upper pressing plate (3), a lower pressing plate (4), a lifting cylinder (5), a balance cylinder (6), an upper pressing plate guide assembly (7), a feeding and discharging device guide rail assembly (8) and an oil tank (9);
the frame (1) adopts a frame type structure and is composed of four frame groups, each frame group is formed by welding two frame pieces and a connecting piece, and the frame groups are connected into a whole through bolts;
the four-row and two-column type hydraulic buffer structure comprises eight main oil cylinders (2), two main oil cylinders (2) and a buffer heat insulation pad, wherein the eight main oil cylinders (2) are of plunger type structures and are arranged on the upper part of a frame (1), two main oil cylinders (2) are arranged in each frame group in a rectangular array of four rows and two columns, cylinder barrel ends of the main oil cylinders (2) are arranged on the lower plane of an upper frame beam of the frame group, plunger end parts of the main oil cylinders (2) are connected with the upper surface of an upper pressing plate (3) through connecting pieces and bolts, and the buffer heat insulation pad is arranged between the plunger end parts and the upper pressing plate (3);
the lower surface of the lower pressing plate (4) is arranged on the upper plane of the lower frame beam of the frame group, and a buffer heat insulation pad is also arranged between the lower pressing plate (4) and the lower frame beam of the frame group;
the insides of the upper pressing plate (3) and the lower pressing plate (4) are respectively provided with the same pressing plate cooling water pore canal loop;
four lifting cylinders (5) are respectively arranged at four corners of the frame (1) by adopting a single-rod double-acting piston structure, cylinder barrels of the lifting cylinders (5) are fixed on upper frame beams of frame groups at the front end and the rear end of the frame (1), and piston rods of the lifting cylinders (5) are connected with the side surfaces of the upper pressing plate (3) through lug seats and pin shafts;
the four balance cylinders (6) adopt a double-rod double-acting piston type structure, two balance cylinders are respectively arranged at the front end and the rear end of the frame (1) and are respectively positioned at four corners of the frame (1), cylinder barrels of the balance cylinders (6) are fixedly arranged at the outer sides of upper frame beams of frame groups at the two ends of the frame (1), and lower piston rods of the balance cylinders (6) are connected with the upper surface of the upper pressing plate (3) through lug seats and pin shafts; the two balance cylinders (6) are positioned on the diagonal line of the frame (1), wherein the upper cavity and the lower cavity of one balance cylinder (6) are respectively communicated with the lower cavity and the upper cavity of the other balance cylinder (6) through oil pipes;
the upper pressing plate guide assemblies (7) are two sets, one set is respectively arranged in the middle of the front end and the rear end of the frame (1), guide rods of the upper pressing plate guide assemblies (7) are vertically arranged, the lower ends of the guide rods are fixedly connected with the upper surface of the upper pressing plate (3), and guide wheels of the upper pressing plate guide assemblies (7) are fixed on the outer sides of upper frame beams of frame groups at the two ends of the frame (1);
the cooling system comprises a cooling circulation system of a water chilling unit and a secondary circulation system of a hot water temperature control unit group;
the cooling system of the water chilling unit comprises a pressure stabilizing water tank (10), a water chilling unit circulating pump (11), a hot water thermometer (12), a water chilling unit (13), a water chilling unit temperature sensor (14), a water chilling thermometer (15), a water chilling pipeline (16), a hot water pipeline (17) and a water supplementing valve (32); an outlet of the water chiller (13) is connected with a cold water pipeline (16), an inlet of the water chiller (13) is connected with a hot water pipeline (17), a water chiller circulating pump (11) is connected on the hot water pipeline (17) in series, and an inlet of the pressure stabilizing water tank (10) is connected with an inlet of the water chiller circulating pump (11); the inlet of the pressure stabilizing water tank (10) is also connected with a water supplementing valve (32), and the water supplementing valve (32) is connected with an external water source; a hot water thermometer (12) is arranged at the inlet of the cold water machine (13); the outlet of the cold water machine (13) is respectively provided with a cold water temperature sensor (14) and a cold water thermometer (15);
the hot water temperature control unit group secondary circulation system comprises an upper pressure plate secondary circulation system and a lower pressure plate secondary circulation system, and the configuration and connection modes of the upper pressure plate secondary circulation system and the lower pressure plate secondary circulation system are the same;
the upper pressure plate secondary circulation system comprises an upper pressure plate electric three-way regulating valve (18), an upper pressure plate circulating pump (19), an upper pressure plate temperature sensor (20), an upper pressure plate water inlet thermometer (21), an upper pressure plate water inlet pipeline (22), an upper pressure plate water return pipeline (23) and an upper pressure plate circulating connecting pipe (24); the upper pressure plate electric three-way regulating valve (18) is provided with an inlet a, an outlet b and an outlet c, wherein the inlet a is connected with a cold water pipeline (16), the outlet b is connected with an inlet of an upper pressure plate circulating pump (19), and the outlet c is connected with an upper pressure plate water return pipeline (23); an outlet of the upper pressing plate circulating pump (19) is connected with an upper pressing plate water inlet pipeline (22) and is communicated with a pressing plate cooling water pore passage loop in the upper pressing plate (3); the probe of the upper pressure plate temperature sensor (20) is arranged in the upper pressure plate (3); the upper pressure plate water inlet thermometer (21) is connected with an inlet of the upper pressure plate circulating pump (19); one end of the upper pressing plate circulating connecting pipe (24) is connected with the outlet b, the other end of the upper pressing plate circulating connecting pipe is connected with the upper pressing plate water return pipeline (23) and is communicated with a pressing plate cooling water pore canal loop in the upper pressing plate (3); the upper pressing plate water return pipeline (23) is connected with the hot water pipeline (17);
the lower pressure plate secondary circulation system comprises a lower pressure plate electric three-way regulating valve (25), a lower pressure plate circulating pump (26), a lower pressure plate temperature sensor (27), a lower pressure plate water inlet thermometer (28), a lower pressure plate water inlet pipeline (29), a lower pressure plate water return pipeline (30) and a lower pressure plate circulating connecting pipe (31); the lower pressure plate electric three-way regulating valve (25) is provided with an inlet d, an outlet e and an outlet f, wherein the inlet d is connected with a cold water pipeline (16), the outlet e is connected with an inlet of a lower pressure plate circulating pump (26), and the outlet f is connected with a lower pressure plate water return pipeline (30); the outlet of the lower pressure plate circulating pump (26) is connected with a lower pressure plate water inlet pipeline (29) and is communicated with a pressure plate cooling water pore passage loop in the lower pressure plate (4); the probe of the lower pressure plate temperature sensor (27) is arranged in the lower pressure plate (4); the lower pressure plate water inlet thermometer (28) is connected to the inlet of the lower pressure plate circulating pump (26); one end of the lower pressure plate circulating connecting pipe (31) is connected with the outlet e, the other end of the lower pressure plate circulating connecting pipe is connected with the lower pressure plate water return pipeline (30), and the lower pressure plate circulating connecting pipe is communicated with a pressure plate cooling water pore channel loop in the lower pressure plate (4); the lower pressing plate water return pipeline (30) is connected with the hot water pipeline (17).
2. The cooling press after hot pressing of the high-pressure laminated board according to claim 1, wherein the cooling water channel loop of the pressing board adopts a split-area multi-loop mode, and cooling water is led into a plurality of areas of the upper pressing board (3) and the lower pressing board (4) simultaneously in a plurality of ways.
3. The cooling press after hot pressing of the high-pressure laminated board according to claim 1, wherein the oil tank (9) is arranged at the top of the frame (1), comprises two oil tank bodies, a motor, an oil pump, various hydraulic control valves and an air filter, and is connected with the main oil cylinder (2), the lifting cylinder (5) and the balance cylinder (6) through oil pipes to form a hydraulic control loop system of a main machine of the cooling press.
4. The cooling press after hot pressing of the high-pressure laminated board according to claim 1, wherein the two sets of guide rail assemblies (8) of the feeding and discharging device are respectively positioned at two sides of the lower pressing plate (4) and are connected with the lower frame beams of the frame group of the stand (1).
5. A method of operating a cooling press after hot pressing of a high pressure laminate according to claim 1, comprising the steps of:
after the hot pressing of the high-pressure laminated board is finished, discharging the high-pressure laminated board from a hot press through a feeding and discharging device and feeding the high-pressure laminated board into a neutral space between an upper pressing plate (3) and a lower pressing plate (4) of a main cooling press machine, starting a hydraulic control loop system of the main cooling press machine, controlling a main oil cylinder (2) to feed oil, enabling a plunger of the main oil cylinder (2) to extend out to drive the upper pressing plate (3) to descend, closing and pressurizing the main cooling press machine until the pressure reaches a preset value, stopping oil supply to the main oil cylinder (2), entering a pressure maintaining stage, and transmitting heat to the upper pressing plate (3) and the lower pressing plate (4) through contact heat transfer by a high-temperature high-pressure laminated board;
step 2, starting a cooling system, namely regulating the opening degree of an inlet a of an upper pressure plate electric three-way regulating valve (18) to be maximum, regulating the opening degree of an outlet b to be maximum, regulating the opening degree of an inlet e of a lower pressure plate electric three-way regulating valve (25) to be maximum, regulating the opening degree of an outlet d to be maximum, and regulating the outlet f to be closed, starting a cold water machine circulating pump (11), an upper pressure plate circulating pump (19) and a lower pressure plate circulating pump (26), so that cooling water in the cooling system circularly flows, and respectively conveying cold water output by a cold water machine (13) to the upper pressure plate electric three-way regulating valve (18) and the lower pressure plate electric three-way regulating valve (25) in two ways through a cold water pipeline (16); one path of cold water enters a pressure plate cooling water pore canal loop in the upper pressure plate (3) through an outlet b of an upper pressure plate electric three-way regulating valve (18), an upper pressure plate circulating pump (19) and an upper pressure plate water inlet pipeline (22), absorbs heat of the upper pressure plate (3) and becomes hot water, and then is discharged through an upper pressure plate water return pipeline (23) and enters a hot water pipeline (17); meanwhile, the other path of cold water enters a pressure plate cooling water channel loop in the lower pressure plate (4) through an outlet e of the lower pressure plate electric three-way regulating valve (25), a lower pressure plate circulating pump (26) and a lower pressure plate water inlet pipeline (29), absorbs heat of the lower pressure plate (4) and becomes hot water, and then is discharged through a lower pressure plate water return pipeline (30) and enters a hot water pipeline (17); hot water in the hot water pipeline (17) is conveyed to the cold water machine (13) for cooling through the cold water machine circulating pump (11), and is conveyed to the upper pressure plate electric three-way regulating valve (18) and the lower pressure plate electric three-way regulating valve (25) through the cold water pipeline (16) respectively, so that the circulating cooling of the upper pressure plate (3) and the lower pressure plate (4) is realized, and the high-temperature high-pressure laminated plate is gradually cooled under the pressurized state; in the cooling circulation process, the water temperature change can cause the water pressure change of the cooling system, the pressure stabilizing water tank (10) can keep the water pressure in the cooling system stable, when the water pressure in the cooling system is increased, high-pressure water enters the pressure stabilizing water tank (10), and when the water pressure in the cooling system is reduced, the high-pressure water in the pressure stabilizing water tank (10) is discharged, so that the water pressure in the cooling system is stabilized;
step 3, in the circulating cooling process, the temperatures of the upper pressing plate (3) and the lower pressing plate (4) are synchronously lowered and kept consistent by respectively adjusting the flow of cold water entering the upper pressing plate (3) and the lower pressing plate (4); when the temperature of the upper pressing plate (3) is lower than that of the lower pressing plate (4), controlling the opening degree of an outlet b of an upper pressing plate electric three-way regulating valve (18) to be smaller and the opening degree of an outlet c to be larger, so that the flow rate of cold water entering the upper pressing plate (3) is smaller, the cooling speed of the upper pressing plate (3) is reduced, and the temperature of the upper pressing plate (3) is consistent with that of the lower pressing plate (4); conversely, when the temperature of the lower pressure plate (4) is lower than the temperature of the upper pressure plate (3), controlling the opening degree of an outlet e of the lower pressure plate electric three-way regulating valve (25) to be smaller and the opening degree of an outlet f to be larger, so that the flow rate of cold water entering the lower pressure plate (4) is smaller, the cooling speed of the lower pressure plate (4) is reduced, and the temperature of the lower pressure plate (4) is consistent with the temperature of the upper pressure plate (3); thereby keeping the temperature of the upper pressing plate (3) and the lower pressing plate (4) synchronously reduced and consistent, keeping the temperature of the upper surface and the lower surface of the high-temperature high-pressure laminated plate synchronously reduced, and avoiding generating thermal stress;
step 4, when the temperatures of the upper pressing plate (3) and the lower pressing plate (4) are reduced to a preset temperature of 15 ℃, an outlet b of an electric three-way regulating valve (18) of the upper pressing plate and an outlet e of an electric three-way regulating valve (25) of the lower pressing plate are closed, and meanwhile, a circulating pump (11) of the water chiller stops working, and cooling water in a cooling circulating system of the water chiller stops flowing; the upper pressing plate circulating pump (19) and the lower pressing plate circulating pump (26) continue to work, so that water in a pressing plate cooling water pore path loop in the upper pressing plate (3) and water in a pressing plate cooling water pore path loop in the lower pressing plate (4) are respectively circulated in a closed mode, the temperature of the high-pressure laminated plate is further reduced and tends to be stable until the preset cooling time is over, and the temperature of the high-pressure laminated plate is lower than 40 ℃; the preset cooling time is smaller than the hot pressing time, and the preset cooling time is set according to the thickness of the high-pressure laminated board;
step 5, when the preset cooling time is over, the main oil cylinder (2) of the main cooling press machine is depressurized, an oil return channel is opened, the lifting cylinder (5) works to enable the upper pressing plate (3) to ascend, a plunger of the main oil cylinder (2) ascends along with the ascending, oil in the main oil cylinder (2) returns to the oil tank (9), the main cooling press machine is opened, and the pressurizing and cooling are finished;
and 6, delivering the pressurized and cooled high-pressure laminated board out of the cooling press main machine through the feeding and discharging device, stacking, delivering the next hot-pressed high-pressure laminated board into the cooling press main machine, and pressurizing and cooling again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311013838.XA CN117021683A (en) | 2023-08-11 | 2023-08-11 | Cooling press for hot pressed high-pressure laminated board |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311013838.XA CN117021683A (en) | 2023-08-11 | 2023-08-11 | Cooling press for hot pressed high-pressure laminated board |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117440671A (en) * | 2023-12-21 | 2024-01-23 | 福建省江南冷却科技有限公司 | Cooling system of intelligent mining equipment unit and control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117440671A (en) * | 2023-12-21 | 2024-01-23 | 福建省江南冷却科技有限公司 | Cooling system of intelligent mining equipment unit and control method thereof |
| CN117440671B (en) * | 2023-12-21 | 2024-03-08 | 福建省江南冷却科技有限公司 | Control method of cooling system of intelligent mining equipment unit |
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