CN109746988B - Air-jet cooling device, continuous hot-in cold-out hot press and continuous cooling method thereof - Google Patents
Air-jet cooling device, continuous hot-in cold-out hot press and continuous cooling method thereof Download PDFInfo
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- CN109746988B CN109746988B CN201910033157.7A CN201910033157A CN109746988B CN 109746988 B CN109746988 B CN 109746988B CN 201910033157 A CN201910033157 A CN 201910033157A CN 109746988 B CN109746988 B CN 109746988B
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- 238000001816 cooling Methods 0.000 title claims abstract description 109
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000002347 injection Methods 0.000 claims abstract description 29
- 239000007924 injection Substances 0.000 claims abstract description 29
- 229910000831 Steel Inorganic materials 0.000 claims description 32
- 239000010959 steel Substances 0.000 claims description 32
- 238000007731 hot pressing Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 9
- 239000007921 spray Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000004134 energy conservation Methods 0.000 abstract 2
- 239000010410 layer Substances 0.000 description 12
- 238000003825 pressing Methods 0.000 description 6
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 4
- 235000017491 Bambusa tulda Nutrition 0.000 description 4
- 241001330002 Bambuseae Species 0.000 description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 4
- 239000011425 bamboo Substances 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 230000005587 bubbling Effects 0.000 description 3
- 239000011120 plywood Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000012792 core layer Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
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- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
The invention discloses an air-jet cooling device, a continuous hot-in cold-out hot press and a continuous cooling method thereof, wherein the air-jet cooling device comprises a plurality of cooling pressure plates, an air supply pipeline and a water sprayer; the cooling press plates are arranged to form an upper layer structure and a lower layer structure, a plurality of long holes are uniformly distributed on the side surfaces of the cooling press plates, one ends of the long holes are closed, a plurality of air injection holes are uniformly distributed on the working area acting surface of the cooling press plates, each long hole is communicated with a plurality of air injection holes, the air supply pipeline comprises a plurality of air supply branch pipes and an air supply main pipe, and the air supply branch pipes are communicated with the air supply main pipe and the other ends of the long holes on the side surfaces of the cooling press plates; the side walls of the air supply branch pipes of the front 1/5-1/3 of the upper and lower layer structures are communicated with the water fog machine. The jet cooling device has the advantages of simple structure, good cooling effect, high efficiency, energy conservation, less heat loss of the cooling method, short production period, energy conservation and good quality of produced products.
Description
Technical Field
The invention relates to the field of artificial boards, in particular to an air-jet cooling device, a continuous hot-in and cold-out hot press and a continuous cooling method thereof.
Background
For the thermosetting molding of bamboo plywood and other unit assembly structures applying glue by adopting a glue dipping mode, because the water content is high, the bamboo plywood and other unit assembly structures applying glue by adopting a glue dipping mode are not easy to dry by a conventional method, and the water is not easy to evaporate during thermosetting gluing, the phenomena of bubbling and plate sticking are easy to occur by adopting a hot-in and hot-out hot-pressing mode when the unit veneers are molded, and the product quality and the production efficiency are greatly influenced, so the traditional bamboo curtain bamboo mat plywood is mostly manufactured by adopting a cold-hot-cold method, but the method has the advantages of long production period, low efficiency, large heat loss, large consumption of a large amount of water and electricity and high cost.
Disclosure of Invention
In view of the above disadvantages, the present invention provides an air-jet cooling device, a continuous hot-in and cold-out hot press, and a continuous cooling method thereof.
The first purpose of the invention is to provide a jet cooling device, which comprises a plurality of cooling pressure plates, an air supply pipeline and a water sprayer; the cooling press plates are arranged to form an upper layer structure and a lower layer structure, a plurality of long holes are uniformly distributed on the side surfaces of the cooling press plates, one ends of the long holes are closed, a plurality of air injection holes are uniformly distributed on the working area acting surface of the cooling press plates, each long hole is communicated with a plurality of air injection holes, the air supply pipeline comprises a plurality of air supply branch pipes and an air supply main pipe, and the air supply branch pipes are communicated with the air supply main pipe and the other ends of the long holes on the side surfaces of the cooling press plates; the side walls of the air supply branch pipes of the front 1/5-1/3 of the upper and lower layer structures are communicated with the water fog machine.
Further, the length of the air injection cooling device is 1/3-1/2 of a hot-in and cold-out hot-press system in a continuous mode.
Furthermore, the number of the long holes and the number of the air injection holes on the cooling pressure plates in the upper layer structure and the lower layer structure are continuously reduced from front to back.
Further, the water sprayer is arranged at a long hole close to the side face of the cooling pressing plate.
The second purpose of the invention is to provide a continuous hot-in and cold-out hot press, which comprises a hot-in and hot-out continuous hot press and the air jet cooling device, wherein the air jet cooling device is arranged at the plate outlet of the hot-in and hot-out continuous hot press.
A third object of the present invention is to provide a continuous cooling method for a continuous hot-in and cold-out hot press, which is characterized in that the method comprises:
the formed plate blank after the continuous hot pressing of the continuous hot press machine with heat in and out continuously passes through the air injection cooling device continuously along with the steel strip, the compressed air with atomized water vapor is injected onto the roller chain and the steel strip from the air injection holes, and the air and the water vapor in the air and the steel strip exchange heat to force the steel strip to be cooled, so that the plate blank between the steel strips is cooled.
Furthermore, the front section of the air injection cooling device is positioned in the pressure maintaining area, the pressure is 95% -75% of the pressure of the continuous hot-pressing outlet end, the middle section of the air injection cooling device is positioned in the pressure reducing area, the pressure is 70% -35% of the pressure of the continuous hot-pressing outlet end, the rear section of the air injection cooling device is positioned in the low-pressure area, and the pressure is less than 30% of the pressure of the continuous hot-pressing outlet end.
Furthermore, the amount of cooling air spraying required by each cubic meter of the plate is 2000-4000Kg, and the amount of atomized water vapor carried by the plate is 20-40 Kg.
Furthermore, the amount of compressed air and the amount of atomized water vapor are continuously reduced along the length direction of the jet cooling device.
Furthermore, the temperature of the compressed air with atomized water vapor sprayed by the cooling pressing plate of the air-jet cooling device is room temperature, and the temperature of the formed plate blank is reduced to 50-80 ℃ when the formed plate blank is taken out of the plate by cooling the steel belt.
The invention has the beneficial effects that: 1. compared with the mode that the pressing plate for introducing cooling water conducts heat to the roller chain and the steel strip, the cooling pressing plate is provided with the air injection holes, cooling gas is sprayed to the roller chain and the steel strip to conduct heat convection, the cooling efficiency is obviously improved, and a large amount of tap water can be saved.
2. The method of adopting the periodic cold-in and cold-out of the press needs to cool the hot pressing plate, the heat loss is large, the production period is long, while the method of adopting the continuous cold-in and cold-out of the press only cools the steel belt and the roller chain, the heat loss is small, the energy consumption is low, a large amount of tap water is saved, the hot pressing and the cooling can be carried out simultaneously, the production period is obviously shortened, and the production efficiency is obviously improved;
3. compared with the periodic hot-in hot-out method, the hot-pressed molding is cooled by the cooling device and then is discharged, so that bubbling is not easy to occur, the dimensional stability is good, the board surface quality is good, the thickness deviation is small, and the product quality is obviously improved.
Drawings
FIG. 1a is a schematic view of a cooling platen located at the front of a jet cooling unit;
FIG. 1b is a schematic view of a cooling platen located at the rear of the jet cooling unit;
FIG. 2 is a side view of a continuous hot-in cold-out press;
FIG. 3 is a partial schematic view of a slab, strip, roller chain and cold platen;
FIG. 4 is a pressure curve of a platen in the length direction of a gas jet cooling device;
illustration of the drawings: the device comprises a cooling pressure plate 1, a long hole 2, an air injection hole 3, a top plate 4, a steel strip 5, a roller chain 6, a formed slab 7, a hot pressing area a, an air injection cooling area b, a pressure maintaining area b1, a pressure reducing area b2 and a low pressure area b 3.
Detailed Description
The present invention is described in further detail below with reference to the drawings and the detailed description.
Referring to fig. 1a and 1b, an air-jet cooling device includes a plurality of cooling platens 1, an air supply pipeline, and a water mist device; the cooling device comprises a plurality of cooling press plates, wherein the cooling press plates are distributed to form an upper layer structure and a lower layer structure, a plurality of long holes 2 are uniformly distributed on the side surfaces of the cooling press plates 1, one ends of the long holes are closed, the diameter of the long holes is 8-12mm, a plurality of air injection holes 3 are uniformly distributed on the working area acting surfaces of the cooling press plates, each long hole is communicated with a plurality of air injection holes, the air injection holes 3 are vertically communicated with the long holes 2, the diameter of the air injection holes 3 is 1-3mm, the number of the long holes 2 and the air injection holes 3 on the cooling press plates in the upper layer structure and the lower layer structure is continuously reduced from front to back, and the heat release speed is high because the temperature of a steel belt, a roller chain and a formed plate blank in the front part of the air injection cooling device is high, and more compressed air and atomized water vapor are needed to dissipate heat in unit time; the air supply pipeline comprises a plurality of air supply branch pipes and an air supply main pipe, and the air supply branch pipes are communicated with the air supply main pipe and also communicated with the long holes 2 on the side surface of the cooling pressure plate; the water atomizer is communicated with the air supply branch pipe in the lateral direction and is arranged at a position close to the long hole 2 on the side surface of the cooling pressure plate, so that atomized water vapor is contained in the sprayed compressed air, and efficient cooling is achieved; the side walls of the air supply branch pipes of the front 1/5-1/3 cooling press plates of the upper and lower layer structures are communicated with the water fog machine; the lower layer of the upper and lower layer structure is fixed on the top plate 4, and the pressure of the hydraulic cylinder of the press is uniformly transmitted to the cooling pressing plate 1.
A second object of the present invention is to provide a continuous hot-in cold-out hot press, as shown in fig. 2, comprising a hot-in hot-out continuous hot press and the above-mentioned air-jet cooling device, which is installed at the outlet plate of the hot-in hot-out continuous hot press.
The third purpose of the invention is to provide a continuous cooling method for a continuous hot-in and cold-out hot press, which comprises the following steps:
the formed plate blank 7 after the continuous hot pressing of the hot-in and hot-out continuous hot press continuously passes through the air injection cooling device along with the steel strip 5, the compressed air with atomized water vapor is injected onto the roller chain 6 and the steel strip 5 from the air injection holes 3, and the heat exchange between the air and the water vapor in the air and the hot steel strip 5 forces the steel strip 5 to be cooled, so that the formed plate blank 7 between the steel strips 5 is cooled. Because the atomized water vapor in the gas is heated, evaporated and absorbed heat, the rapid cooling of the steel strip 5 is realized, the temperature difference between the high-temperature forming plate blank 7 and the steel strip 5 is rapidly increased, the heat conduction between the forming plate blank 7 and the steel strip 5 is accelerated, and the purpose of rapidly cooling the forming plate blank 7 is achieved.
As shown in fig. 3, the continuous hot-in/cold-out hot press can be divided into a hot-pressing area a and an air-jet cooling area b in the length direction, the hot-pressing plate temperature of the hot-pressing area a is the temperature required by the hot-pressing process of the plate, and occupies a total length of 1/2-2/3, and the rest is the air-jet cooling area b. The temperature of compressed air with atomized water vapor sprayed by a cooling pressing plate 1 of the air-jet cooling device is room temperature, and the temperature of a formed plate blank 7 is reduced to 50-80 ℃ when the plate blank is taken out of the plate by continuously and rapidly cooling a steel belt 5; the front section of the air injection cooling device is positioned in a pressure maintaining area b1, the pressure is 95-75% of the pressure of the continuous hot-pressing outlet end, the middle section is positioned in a pressure reducing area b2, the pressure is 70-35% of the pressure of the continuous hot-pressing outlet end, the rear section is positioned in a low-pressure area b3, and the pressure is less than 30% of the pressure of the continuous hot-pressing outlet end; the front end is kept at a high pressure, which is beneficial to preventing the phenomena of bubbling, deformation and the like of the plate blank caused by the steam pressure generated by high temperature, and the pressure is gradually reduced along with the reduction of the temperature of the formed plate blank. The amount of cooling air spraying per cubic meter of the plate is 2000-4000Kg, and the amount of atomized water vapor carried by the plate is 20-40 Kg. The compressed air volume that the cooling device front end sprays is big, and the atomizing steam volume that it carried is also many to reduce along slab feeding direction substep, can rapid evaporation so that absorb more heat in order to guarantee atomizing steam, accelerate the cooling of steel band, increase the difference in temperature of slab and steel band, the quick cooling shaping slab. The invention can adjust the compressed air quantity and the atomized water vapor quantity according to different thicknesses of the formed plate blank 7 so as to meet the required cooling requirements, such as: the heat of the core layer of the thicker formed plate blank 7 is more difficult to be conducted to the surface, the required compressed air quantity and the required atomized water vapor quantity are larger, the air injection speed can be increased by improving the air inlet pressure, and the compressed air quantity and the atomized water vapor quantity are further increased; otherwise, the opposite is true, as shown in FIG. 4.
It should be understood that this example is only for illustrating the present invention and is not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Claims (10)
1. A jet cooling device is characterized by comprising a plurality of cooling pressure plates, an air supply pipeline and a water sprayer; the cooling press plates are arranged to form an upper layer structure and a lower layer structure, a plurality of long holes are uniformly distributed on the side surfaces of the cooling press plates, one ends of the long holes are closed, a plurality of air injection holes are uniformly distributed on the working area acting surface of the cooling press plates, each long hole is communicated with a plurality of air injection holes, the air supply pipeline comprises a plurality of air supply branch pipes and an air supply main pipe, and the air supply branch pipes are communicated with the air supply main pipe and the other ends of the long holes on the side surfaces of the cooling press plates; the side walls of the air supply branch pipes of the front 1/5-1/3 cooling press plates of the upper and lower layer structures are communicated with the water fog machine; compressed air with atomized water vapor is sprayed from the gas injection holes onto the roller chain and the steel strip, and the gas and the water vapor therein exchange heat with the steel strip to force the steel strip to cool, thereby cooling the slab between the steel strips.
2. The air jet cooling device of claim 1, wherein the length of the air jet cooling device is 1/3-1/2 of continuous hot-in and cold-out hot-press system.
3. The air jet cooling device of claim 1, wherein the number of the long holes and the air jet holes on the cooling pressure plate in the upper and lower layer structures is reduced from front to back.
4. A jet cooling device as claimed in claim 1, wherein the water atomiser is mounted adjacent the long side of the cooling platen.
5. A continuous hot-in cold-out hot press comprising a hot-in hot-out continuous hot press and the air jet cooling apparatus of claim 1, said air jet cooling apparatus being mounted at an exit plate of the hot-in hot-out continuous hot press.
6. A method of continuous cooling of a continuous hot-in cold-out hot-press according to claim 5, characterized in that the method comprises:
the formed plate blank after the continuous hot pressing of the continuous hot press machine with heat in and out continuously passes through the air injection cooling device continuously along with the steel strip, the compressed air with atomized water vapor is injected onto the roller chain and the steel strip from the air injection holes, and the air and the water vapor in the air and the steel strip exchange heat to force the steel strip to be cooled, so that the plate blank between the steel strips is cooled.
7. The continuous cooling method as claimed in claim 6, wherein the jet cooling device has a front section in a pressure maintaining zone with a pressure of 95-75% of the continuous hot-pressing outlet end, a middle section in a pressure reducing zone with a pressure of 70-35% of the continuous hot-pressing outlet end, and a rear section in a low pressure zone with a pressure of less than 30% of the continuous hot-pressing outlet end.
8. The continuous cooling method as claimed in claim 7, wherein the amount of cooling air spray per cubic meter of the plate is 2000-4000Kg, and the amount of atomized water vapor carried by the plate is 20-40 Kg.
9. The continuous cooling method of claim 8, wherein the amount of compressed air and the amount of atomized water vapor decrease along the length of the jet cooling device.
10. The continuous cooling method according to claim 9, wherein the temperature of the compressed air with atomized water vapor sprayed from the cooling platen of the air jet cooling device is room temperature, and the temperature of the formed slab is reduced to 50-80 ℃ by cooling the steel strip.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910033157.7A CN109746988B (en) | 2019-01-14 | 2019-01-14 | Air-jet cooling device, continuous hot-in cold-out hot press and continuous cooling method thereof |
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| CN201910033157.7A CN109746988B (en) | 2019-01-14 | 2019-01-14 | Air-jet cooling device, continuous hot-in cold-out hot press and continuous cooling method thereof |
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| CN109746988B true CN109746988B (en) | 2021-07-23 |
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| CN115972738B (en) * | 2022-12-09 | 2024-07-16 | 安徽依索拉复合材料有限公司 | Hot press for producing insulating plate and method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6994820B2 (en) * | 2003-02-18 | 2006-02-07 | Weyerhaeuser Company | Method of forming a compressed composite product |
| JP2006231621A (en) * | 2005-02-23 | 2006-09-07 | Eidai Co Ltd | Manufacturing method of veneer laminated decorative material and clamping board used therein |
| CA3009693C (en) * | 2008-10-20 | 2020-06-30 | Acell Industries Limited | Composite product with surface effect |
| CN201527376U (en) * | 2009-06-26 | 2010-07-14 | 上海大学 | Air-blowing cooling device |
| CN202292930U (en) * | 2011-10-12 | 2012-07-04 | 林太滋 | Formaldehydeless solid wood composite board |
| CN202528291U (en) * | 2011-12-09 | 2012-11-14 | 南京林业大学 | Spray evaporation cooling hot press |
| CN102423889B (en) * | 2011-12-09 | 2014-07-30 | 南京林业大学 | Spray evaporation cooling hot press, and single-sided compressed wooden plate and production method thereof |
| CN102529293A (en) * | 2012-01-18 | 2012-07-04 | 敦化市亚联机械制造有限公司 | Heating cooling sizing integrated double steel strip continuous press for producing composite board |
| CN104066582B (en) * | 2012-01-25 | 2017-03-29 | 爱莎·艾伯莱有限公司 | Functional layer pressing plate warpage removing method |
| CN103423985A (en) * | 2012-05-18 | 2013-12-04 | 湖州南浔振建机电成套设备有限公司 | Plate cooling device |
| CN103128808B (en) * | 2012-11-29 | 2016-04-13 | 黄成存 | A kind of full bamboo plywood of new structure and manufacture method |
| CN103950264B (en) * | 2014-04-21 | 2015-10-21 | 杭州华聚复合材料有限公司 | A kind of cellular thermoplastic sheet material and production method thereof and two Steel-belt Continuous Press |
| CN205364763U (en) * | 2015-12-01 | 2016-07-06 | 上海网讯新材料科技股份有限公司 | Cooling apparatus for in metal plastic compound area production |
| CN107662252A (en) * | 2016-12-30 | 2018-02-06 | 北京林业大学 | A kind of manufacture method of wood single-plate plastics composite inner wall decorative panel |
| CN106607971A (en) * | 2017-03-08 | 2017-05-03 | 中国福马机械集团有限公司 | A continuous type press |
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