CN101670606B - Hot-pressing system for manufacturing board by utilizing crop straws - Google Patents
Hot-pressing system for manufacturing board by utilizing crop straws Download PDFInfo
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- CN101670606B CN101670606B CN200810212318A CN200810212318A CN101670606B CN 101670606 B CN101670606 B CN 101670606B CN 200810212318 A CN200810212318 A CN 200810212318A CN 200810212318 A CN200810212318 A CN 200810212318A CN 101670606 B CN101670606 B CN 101670606B
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Abstract
The invention relates to a hot-pressing system for manufacturing a board by utilizing crop straws, which comprises a machine frame, a hot pressing board, a drive mechanism, a control system and a heating system, wherein the hot-pressing board is arranged on the machine frame; the drive mechanism drives the hot-pressing board to open and close; and the control system controls the whole system. The system is characterized in that the heating system comprises a high-temperature heating subsystem and a low-temperature circulation subsystem; the high-temperature heating subsystem and the low-temperature circulation subsystem are connected with the hot-pressing board respectively and are used for controlling the temperature of the hot-pressing board to change according to certain cycle so as to make the hot-pressing board have a compression temperature needed by compressing a board blank and a molding temperature needed by molding the board blank; and the molding temperature is lower than the compression temperature. The invention carries out novel design on the hot-pressing system used in critical hot-pressing technology in a crop straw board manufacturing method so as to overcome the defects of the prior hot-pressing system, shorten the whole processing time, reduce the cost and improve product quality.
Description
Technical field
The present invention relates to a kind of process equipment that utilizes crops to make sheet material, relate in particular to a kind of hot-pressing system that is used for whole machining process process heat pressing process.
Background technology
Scarcity and requirement on environmental protection along with timber resources; The sheet material price that with timber is raw material is more and more expensive; And various countries put into effect a series of laws and regulations that protect forest resources in succession, and the sheet material of therefore seeking new material substitutes certain choosing that the wood-base fibre and particle panel material material becomes the field pattern existence of sheet material city, seeks development.And agricultural crop straw is big with its byproduct as agricultural production, output; And cellulose and lignin content are higher; And become the preferred material that substitutes the wood-base fibre and particle panel material material; So not only can " good and cheap, turn waste into wealth ", and can reduce crop straw burning, reduce deforestation, avoid indoor formaldehyde to pollute, improve people's living standard.But; Because agricultural crop straw is because of its intrinsic characteristic; For example fiber is short, non-fibrocyte is many, particle is difficult to compression, thermal conductivity factor is lower than factors such as timber; Cause the difficulty of processing that the difficulty of processing of crops sheet material is far longer than the wood-base fibre and particle panel material material, not only cost is high but also can only be the flakeboard of low side thereby cause the agricultural crop straw sheet material that processes at present, still can not produce high-quality, high-end middle-high density sheet material.According to present technology, the processing step of making sheet material as raw material with agricultural crop straw generally comprises: the raw material classification, and raw material is just handled, wood shavings preparations (raw material pulverizing), glue mixing is mated formation, hot pressing, pre-treatment and finished product are handled.Wherein, the factor that influences the manufactured goods board quality has a lot, but develops into now, and heat pressing process has become a bottleneck of restriction agricultural crop straw board quality.
The complete set of equipments that is used for the making sheet of agricultural crop straw plate comes from wood material and produces particieboard or medium density fibre board (MDF), makes a general survey of agricultural crop straw plate production system both domestic and external; Although having carried out local (such as pretreatment of raw material, spray glue, demoulding etc.) to the characteristic of agricultural crop straw, some systems correspondingly improve; But its hot-pressing system all follows the hot-pressing system design with wood material making sheet, and is applied to the hot-pressing system that the agricultural crop straw plate is produced, and pursues to the more accurate control of pressure with to accuracy control over temperature; Wherein, The pressure controling precision of the hydraulic system of press of some stalk plate production system can reach positive and negative 0.1bar, and for reaching such control accuracy, whole hydraulic system is very complicated; Components and parts expensive such as the pump of being selected for use, valve; And the accurate heating system of some temperature controls, the temperature deviation in the heating platen plate is at positive and negative 1 ℃, and temperature deviation can reach positive and negative 1 ℃ between the heating platen plate.The production plant that sets up based on existing agricultural crop straw mask-making technology and complete production line because pressing cycle is long, causes production efficiency not high, and the agricultural crop straw sheet material of producing is difficult to the main flow market of entering sheet material.Each stalk plate manufacturing enterprise is to be main with specialities such as low-density straw sheet materials basically.Main product to sheet material market; Use agricultural crop straw making sheet; Factor except production cost; The product nail-holding ability is difficult to reach standard, and finished product sheet material moisture content is low and cause the product buckling deformation serious, and slab (thickness be 18mm and more than) is difficult to break through DENSITY LIMIT and causes the sheet material physical and chemical index poor.
Summary of the invention
The technical issues that need to address of the present invention are exactly in order to overcome the defective of above-mentioned prior art; Hot-pressing system to using in the heat pressing process crucial in the agricultural crop straw plate-making method has carried out new design, thus overcome existing hot-pressing system defective, shorten the whole machining process time, reduce cost, improved product quality.
Provide a kind of hot-pressing system that utilizes manufacturing board by crop straws according to the present invention; Comprise frame, be installed in the heating platen on the said frame, the driving mechanism of the said heating platen folding of driving, the control system and the heating system of control whole system work; Said heating system comprises heat subsystem and low temperature cycle subsystem; Said heat subsystem and said low temperature cycle subsystem are connected with said heating platen respectively; The temperature of controlling said heating platen changes according to some cycles; Thereby said heating platen is had slab is compressed required compression temperature and slab is carried out the required forming temperature of moulding, said forming temperature is lower than said compression temperature.
A kind of hot-pressing system of manufacturing board by crop straws that utilizes that provides according to the present invention also has following additional technical feature:
Said heat subsystem comprises high temperature heat conductive oil pond, Oil Guide pump and the conduction oil closed circuit with high temperature heat conductive oil; Said conduction oil closed circuit is communicated with said high temperature heat conductive oil pond and said heating platen; Said low temperature cycle subsystem comprises low temperature heat conduction oil sump, Oil Guide pump and the conduction oil closed circuit with low temperature conduction oil, and said conduction oil closed circuit is communicated with said low temperature cycle subsystem and said heating platen.
Said heating system also comprises temperature sensor, control valve and control device; Said temperature sensor is used to detect temperature and each control point conduction oil temperature of heating system of said heating platen; Said control valve is used to control the break-make of said conduction oil closed circuit; Said control device produces control signal according to the temperature signal that said temperature sensor detects, and control gets into high temperature heat conductive oil or low temperature conduction oil in the said heating platen to said control valve according to control signal.
Low temperature conduction oil timesharing in high temperature heat conductive oil in the said heat subsystem and the said low temperature cycle subsystem inserts same conduction oil closed circuit.
Said conduction oil closed circuit comprises high temperature heat conductive oil closed circuit and low temperature conduction oil closed circuit; High temperature heat conductive oil in the said heat subsystem inserts said high temperature heat conductive oil closed circuit and is connected, and the low temperature conduction oil in the said low temperature cycle subsystem inserts said low temperature conduction oil closed circuit.
Every layer of said heating platen comprises heating plate and alternating temperature plate; The alternating temperature plate of adjacent two layers heating platen is oppositely arranged; Said conduction oil closed circuit comprises heating conduction oil closed circuit and alternating temperature conduction oil closed circuit; High temperature heat conductive oil in the said heat subsystem inserts in the heating plate of said heating platen through said heating conduction oil closed circuit, and the high temperature heat conductive oil timesharing in low temperature conduction oil in the said low temperature cycle subsystem and the said heat subsystem inserts in the alternating temperature plate of said heating platen through said alternating temperature conduction oil closed circuit.
Every layer of said heating platen comprises warming plate and alternating temperature plate, and the alternating temperature plate of adjacent two layers heating platen is oppositely arranged, and is respectively arranged with the conduction oil passage in said warming plate and the said alternating temperature plate.
Said heat subsystem and said low temperature cycle subsystem are connected with said alternating temperature plate respectively, and said heating system also comprises the insulation subsystem, and said insulation subsystem is connected with said warming plate.
Said heat subsystem comprises high temperature heat conductive oil pond, Oil Guide pump and the high temperature heat conductive oil closed circuit with first high temperature heat conductive oil and second high temperature heat conductive oil; Said first high temperature heat conductive oil and the second high temperature heat conductive oil timesharing insert said high temperature heat conductive oil closed circuit; And timesharing gets in the said alternating temperature plate; Said low temperature cycle subsystem comprises low temperature heat conduction oil sump, Oil Guide pump and the low temperature conduction oil closed circuit with the first low temperature conduction oil and second low temperature conduction oil; The said first low temperature conduction oil and the second low temperature conduction oil timesharing insert said low temperature conduction oil closed circuit, and timesharing gets in the said alternating temperature plate.
Said insulation subsystem comprises insulation heat conduction oil sump, Oil Guide pump and the insulation conduction oil closed circuit with insulation conduction oil, and said insulation conduction oil inserts in the said warming plate through said insulation conduction oil closed circuit.
Have following beneficial effect according to a kind of hot-pressing system of manufacturing board by crop straws that utilizes provided by the invention:
1, on the globality of hot-pressing system; Core of the present invention is the controlled temperature control system of process alternating temperature, is not the control accuracy of pursuing a certain Temperature numerical on the control strategy, but satisfies in the slab hot pressing different phase to the demand of different heats; In each pressing cycle; Hot-pressing system can be regulated the temperature of heating platen automatically according to the demand of technology, thereby satisfies the requirement of sheet material alternating temperature heat pressing process, has overturned the mentality of designing of hot-pressing system on the traditional sense; Propose new hot-pressing system mentality of designing, satisfied the process requirements of crops sheet material.
2, because hot-pressing system of the present invention is the processing that realizes crops sheet material through alternating temperature control; Therefore; In the whole heat pressing process process, not high for the required precision of pressure, can select the very low control pressurer system of pressure controling precision for use; Make that Driving Scheme in the hot-pressing system is simple, cost reduces the stability of entire system and reliability height.
3, adopt hot-pressing system of the present invention, use agricultural crop straw to make sheet material as raw material, hot pressing does not have prior steam and discharges the stage process design, can solve the plate bursting and the bubbling problem of sheet material, and save time, improves yield rate and working (machining) efficiency.And the sheet material after the hot pressing still has higher moisture content; Thereby overcome the moisture content problem of middle-high density plate; Eliminated the restriction that moisture content centering high-density plate and thick plates are brought; Process qualified middle-high density plate and/or thick plates when improving finished product sheet material moisture content, make agricultural crop straw sheet material really can substitute middle and high end high-quality wood-base fibre and particle panel material material.
4, adopt the present invention, use agricultural crop straw to make sheet material, in same pressing cycle, can be similar to the temper in the metal processing, make the stress distribution of sheet material more even, reduce the distortion of sheet material, improve finished product accuracy and qualification rate sheet material as raw material.
Description of drawings
Fig. 1 is the structural representation of hot-pressing system of the present invention.
Fig. 2 is the structural representation that removes the part drive unit among Fig. 1.
Fig. 3 is the schematic diagram of first kind of embodiment of the present invention.
Fig. 4 is the schematic diagram of second kind of embodiment of the present invention.
Fig. 5 is the schematic diagram of the third embodiment of the present invention.
Fig. 6 is the schematic diagram of the 4th kind of embodiment of the present invention.
Fig. 7 is the structural representation of the 5th kind of embodiment of the present invention.
The specific embodiment
In order better to set forth principle of the present invention and advantage, at first the heat pressing process that utilizes crops to make sheet material is done detailed explanation.
When slab got into hot-pressing system, heating platen just began heat energy is directly passed to slab through the slab top layer.Since the physical characteristic of raw material, the rate of heat addition that these diabatic processes are different according to the thickness needs of slab.In the heat conductive process, because the top layer of slab contacts with metal caul with the press heating platen, so its top layer is heated very soon.Although the plate top layer can reach the temperature of heating platen very soon, the heat-conducting effect of string own is very poor, and the heat of heating platen can not infiltrate the sandwich layer of slab.Therefore the sandwich layer of slab keeps getting into the preceding temperature of hot-pressing system.On the other hand, in the process on Fast Heating top layer, because the contained water of raw material itself becomes water vapour and because of the temperature difference between the top layer of heat and the cold sandwich layer, steam moves towards the centre of slab and causes sandwich layer to heat.Quick on the top layer, the abundant heated while, the heating of sandwich layer is hysteresis and limited.
By on learn that the heating of slab sandwich layer mainly is to rely on the moisture that exists in the raw material, the moisture content of raw material is therefore very important to processing technology, seems particularly important when particularly producing slab.But the one side that the moisture content in the increase raw material is favourable also has disadvantageous one side.Higher moisture content means when the slab top layer can produce more steam during by Fast Heating, thereby the heat time heating time of sandwich layer has been shortened at this center that just can make steam reach slab quickly, and this is to producing the slab particular importance.But because the top layer of slab is under the high-temperature high-pressure state at this moment, steam can not discharge through the surface of slab, but the edge through slab discharges in the pressures cycle process.Thus, the steam pressure at slab center begins rapidly to rise and reaches a very high pressure.At this moment, if open hot-pressing system, sheet material or layering so, or plate bursting or bubbling.Belong to any situation wherein, made plate all is a scrap.
Therefore, steam the time is to help processing technology in beginning, but near pressures cycle when terminal steam be exactly an obstacle to processing technology.Common way in the past before press is opened, discharges steam as much as possible.This is through reaching in the terminal adding of pressures cycle one " steam discharges the stage ", and the specific purposes in this stage are before press is opened, the steam pressure in the plate to be discharged.In fact, this is through discharging in the sheet material in the press almost all steam pressures, guarantees that press do not open but in this process, will keep just enough pressure.This method makes sheet material can discharge water vapour lentamente and helps the edge release of the steam at plate center through sheet material.In present actual production process, the steam discharge stage needs long time usually, and with regard to the wheat stalk plate, the steam discharge stage accounts for about 1/3 of whole pressing cycle at least.In addition,, cause the moisture content in the final products low, influence product quality owing to discharge the stage with the most of steam release in the sheet material at steam.In order to eliminate above-mentioned defective, the environment health that often will spray water or place certain humidity and temperature the sheet material after the hot pressing improves the moisture content of sheet material with this.
Referring to Fig. 1, Fig. 2 and Fig. 3; A kind of embodiment that utilizes the hot-pressing system of manufacturing board by crop straws that provides in the present invention; Comprise frame 8, be installed in the heating platen 9 on the said frame 8, the driving mechanism 71,72 of said heating platen 9 foldings of driving, the control system and the heating system of control whole system work, wherein the concrete structure of heating platen 9, driving mechanism 7 and control system can adopt the technology of comparative maturity in the prior art.Certainly, hot-pressing system also comprises other some supplementary structures, and the technology for comparative maturity in these prior aries repeats no more to its concrete structure here.
Of the present invention mainly is that heating system is made improvement; Concrete technical scheme is that said heating system comprises heat subsystem 1 and low temperature cycle subsystem 2; Said heat subsystem 1 is connected with said heating platen 9 respectively with said low temperature cycle subsystem 2; The temperature of controlling said heating platen 9 changes according to some cycles; Thereby said heating platen 9 is had slab is compressed required compression temperature and slab is carried out the required forming temperature of moulding, said forming temperature is lower than said compression temperature.The present invention is through being provided with the temperature that heat subsystem 1 and low temperature cycle subsystem 2 are regulated said heating platen 9, thereby can control the temperature of heating platen 9 easily, make the temperature of heating platen 9 in some cycles according to the variations in temperature of setting.
Utilize hot-pressing system of the present invention, can realize the heat pressing process different with prior art.Be specially the hot pressing that slab is carried out and be divided into compression, moulding and temper three phases; Wherein, Forming temperature setting value in formative stage is lower than the compression temperature setting value in compression stage, is between forming temperature setting value and the compression temperature setting value in the temperature setting value of temper in the stage.In this three phases, the temperature that is adopted is different, at compression stage the top layer of slab is heated rapidly, makes the water in the slab become steam and mobile to the slab sandwich layer, thereby heat is delivered to sandwich layer, reaches the required solidification temperature of adhesive rapidly.At formative stage, make the forming temperature setting value be lower than the compression temperature setting value, cause the temperature that is lower than the slab top layer in the heating platen temperature of this stage press, make of the heating platen transmission of the heat on slab top layer, thereby the slab skin temperature is reduced to press.Reduced the steam pressure of slab sandwich layer, and the steam pressure that makes the slab sandwich layer is less than the slab internal bond strength.Therefore, the present invention does not have prior steam and discharges the stage process design, can solve the plate bursting and the bubbling problem of sheet material, and save time, improves yield rate and working (machining) efficiency.
Hot-pressing system of the present invention can be set two temperature, and one of them high temperature is set and is used for compression stage, and a low temperature is set and is used for formative stage.Hot-pressing system is set when high temperature is set intensification from the low temperature in formative stage latter stage, improves programming rate, realizes the temper to slab.Temperature control for heating platen mainly is to realize through length heat time heating time of regulating heat subsystem 1 and 2 pairs of heating platens 9 of low temperature cycle subsystem.
Referring to Fig. 3; In the foregoing description that the present invention provides; Said heat subsystem 1 comprises high temperature heat conductive oil pond, Oil Guide pump 11 and the conduction oil closed circuit 12 with high temperature heat conductive oil; Said conduction oil closed circuit 12 is communicated with said high temperature heat conductive oil pond and said heating platen 9; Said low temperature cycle subsystem 2 comprises low temperature heat conduction oil sump, Oil Guide pump 21 and the conduction oil closed circuit 22 with low temperature conduction oil, and said conduction oil closed circuit 22 is communicated with said low temperature cycle subsystem 2 and said heating platen 9.Said Oil Guide pump 11,21 is installed in the said conduction oil closed circuit 12,22, in order to the low temperature conduction oil in high temperature heat conductive oil in the said high temperature heat conductive oil pond or the said low temperature heat conduction oil sump is transported in the said conduction oil closed circuit 12,22.Have the passage of circulation conduction oil in the said heating platen 9, when the conduction oil of different temperatures flows through in the heating platen, can carry out adjustment heating platen.Conduction oil closed circuit in the said heat subsystem 1 here and the low temperature cycle subsystem 2 can a shared cover, also can be provided with respectively, just finally all is connected on the heating platen 9.
Referring to Fig. 3; In the foregoing description that the present invention provides; Said heating system also comprises temperature sensor 31, control valve 32 and control device 33; Said temperature sensor 31 is used to detect temperature and each control point conduction oil temperature of heating system of said heating platen 9; Said control valve 32 is used to control said conduction oil closed circuit break-make, and said control device 33 produces control signal according to the temperature signal that said temperature sensor 31 detects, and control gets into high temperature heat conductive oil and low temperature conduction oil in the said heating platen 9 to said control valve 32 according to control signal.The temperature that said temperature sensor 31 can detect heating platen 9 automatically is set, realizes automation control, make whole hot-pressing system to realize the hot press working of slab automatically according to pre-set program to the heating platen temperature.Temperature sensor 31 in the present embodiment can adopt general temperature sensor; And control valve 32 can adopt threeway solenoid valve or many logical solenoid valves; The control valve that is adopted will satisfy after receiving control signal; Can regulate the switching of conduction oil according to control signal, automatic switchover high temperature heat conductive oil and low temperature conduction oil flow in the heating platen.Said control device can be carried out corresponding operation according to preset program according to temperature signal, thereby produces the Different control signal.This control device can adopt comparatively ripe single-chip computer control system, certainly, also can adopt other integrated circuit control.
Referring to Fig. 3, in the foregoing description that the present invention provides, the low temperature conduction oil timesharing in high temperature heat conductive oil in the said heat subsystem 1 and the said low temperature cycle subsystem 2 inserts same conduction oil closed circuit.In this scheme, the shared cover conduction oil closed circuit of heat subsystem and low temperature cycle subsystem through the high temperature heat conductive oil in the control adding conduction oil closed circuit and the time length of low temperature conduction oil, is realized the temperature control to heating platen.This scheme relatively simple for structure realized more or less freely.Heating platen in this embodiment is six layers of structure, is used for the five laminate bases of hot pressing simultaneously.
Referring to Fig. 4; In second kind of embodiment that the present invention provides; Said conduction oil closed circuit comprises high temperature heat conductive oil closed circuit 12 and low temperature conduction oil closed circuit 22; High temperature heat conductive oil in the said heat subsystem 1 inserts said high temperature heat conductive oil closed circuit 12 and is connected, and the low temperature conduction oil in the said low temperature cycle subsystem 2 inserts said low temperature conduction oil closed circuit 22.In this scheme, said heating platen is a double-layer structure, and every layer of heating platen comprises heat plate 91 and low-temperature heat plate 92, and wherein said low-temperature heat plate 92 is oppositely arranged, and all is positioned at mutually to the inside, is used for contacting with slab.The thickness of said low-temperature heat plate 92 is thinner than the thickness of heat plate 91, can reduce the temperature of low-temperature heat plate 92 so fast, makes the skin temperature of slab descend fast.Said heating platen is that heat subsystem 1 adopts a cover conduction oil closed circuit respectively with low temperature cycle subsystem 2, and high temperature heat conductive oil closed circuit 12 is connected with heat plate 91, and low temperature conduction oil closed circuit 22 is connected with low-temperature heat plate 92.Control the temperature of heating platen through the time length of control high temperature heat conductive oil or low temperature conduction oil inflow heating platen.This scheme is also comparatively simple, and equipment is easy for installation, good operation stability.
Referring to Fig. 5; In the third embodiment that the present invention provides; Every layer of said heating platen 9 comprises heating plate 93 and alternating temperature plate 94; The alternating temperature plate 94 of adjacent two layers heating platen is oppositely arranged; Said conduction oil closed circuit comprises heating conduction oil closed circuit 13 and alternating temperature conduction oil closed circuit 23, and the high temperature heat conductive oil in the said heat subsystem 1 inserts in the heating plate 93 of said heating platen 9 through said heating conduction oil closed circuit 13, and the high temperature heat conductive oil timesharing in low temperature conduction oil in the said low temperature cycle subsystem 2 and the said heat subsystem 1 inserts in the alternating temperature plate 94 of said heating platen 9 through said alternating temperature conduction oil closed circuit 23.In this scheme; Still adopt each cover of heat subsystem and low temperature cycle subsystem, just at compression stage, the high temperature heat conductive oil in the heat subsystem flows in the two cover conduction oil closed circuits simultaneously; Accelerate programming rate, reach the desired compression temperature as soon as possible.In the tempering stage, also can reach temperature rapidly, realize temper to slab.Wherein, the thickness of said alternating temperature plate 94 is less than the thickness of said heating plate 93, thereby makes that the variations in temperature of alternating temperature plate 94 is relatively sensitiveer, is beneficial to the change of temperature.Heating platen in the present embodiment is a double-layer structure, and every layer of heating platen all comprises oily heating plate 93 and alternating temperature plate 94, and wherein alternating temperature plate 94 is oppositely arranged, and is positioned at inboard in opposite directions, directly contacts with the surface of slab.Through regulating the temperature of alternating temperature plate 94 in the heating platen 9, make the surface temperature of slab change.
Referring to Fig. 6, in the 4th kind of embodiment that the present invention provides, every layer of said heating platen 9 comprises warming plate 95 and alternating temperature plate 96, and the alternating temperature plate 96 of adjacent two layers heating platen 9 is oppositely arranged, and is respectively arranged with the conduction oil passage in said warming plate 95 and the said alternating temperature plate 96.Provided two-layer heating platen in the present embodiment, wherein alternating temperature plate 96 be positioned at heating platen phase to the inside, thereby can directly contact with the surface of slab.Wherein, the thickness of alternating temperature plate 96 is less than the thickness of warming plate 95, thereby is beneficial to the temperature of regulating alternating temperature plate 96.Said heat subsystem 1 is connected with said alternating temperature plate 96 respectively with said low temperature cycle subsystem 2, and said heating system also comprises insulation subsystem 4, and said insulation subsystem 4 is connected with said warming plate 95.Said heating system yet comprises temperature sensor 31, control valve 32 and control device 33; Said temperature sensor 31 is used to detect the temperature of said heating platen 9; Said control valve 32 is used to control said conduction oil closed circuit break-make; Said control device 33 produces control signal according to the temperature signal that said temperature sensor 31 detects, and control gets into high temperature heat conductive oil and low temperature conduction oil in the said heating platen 9 to said control valve 32 according to control signal.
In the present embodiment; Said heat subsystem 1 comprises high temperature heat conductive oil pond, Oil Guide pump 11 and the high temperature heat conductive oil closed circuit 12 with first high temperature heat conductive oil and second high temperature heat conductive oil; Said first high temperature heat conductive oil and the second high temperature heat conductive oil timesharing insert said high temperature heat conductive oil closed circuit 12; And timesharing gets in the said alternating temperature plate 96; Said low temperature cycle subsystem 2 comprises low temperature heat conduction oil sump, Oil Guide pump 21 and the low temperature conduction oil closed circuit 22 with the first low temperature conduction oil and second low temperature conduction oil; The said first low temperature conduction oil and the second low temperature conduction oil timesharing insert said low temperature conduction oil closed circuit 22, and timesharing gets in the said alternating temperature plate 96.Wherein the temperature of first high temperature heat conductive oil is higher than the temperature of second high temperature heat conductive oil, and the temperature of the first low temperature conduction oil is lower than the temperature of the second low temperature conduction oil.Said insulation subsystem 4 comprises insulation heat conduction oil sump, Oil Guide pump 41 and the insulation conduction oil closed circuit 42 with insulation conduction oil, and said insulation conduction oil inserts in the said warming plate 95 through said insulation conduction oil closed circuit 42.In this scheme, said insulation conduction oil inserts in the warming plate 95 all the time, makes the uniform temperature that maintains of warming plate 95.At the compression stage initial stage; First high temperature heat conductive oil inserts in the said alternating temperature plate 96 through said high temperature heat conductive oil closed circuit 12; The heat hot pressing plate after heating platen reaches compression temperature, cuts off first high temperature heat conductive oil rapidly; Second high temperature heat conductive oil is inserted in the said alternating temperature plate 96 through said high temperature heat conductive oil closed circuit 12, and it is constant to keep compression temperature.After compression stage finishes, get into the formative stage initial stage, then cut off second high temperature heat conductive oil; The first low temperature conduction oil is inserted in the said alternating temperature plate 96 through said low temperature conduction oil closed circuit 22; The temperature of heating platen is descended rapidly, reach forming temperature, cut off the first low temperature conduction oil this moment; The second low temperature conduction oil is inserted in the said alternating temperature plate 96 through said low temperature conduction oil closed circuit 22, keep moulding temperature-resistant.The technical scheme of present embodiment can effectively reduce energy consumption, and, change through various temperature, make that the temperature control of heating platen is more flexible.
Heating platen in the above-described embodiments also can be sandwich construction, and referring to Fig. 7, the five-layer structure that provides is used for hot pressing four laminate bases.When heating platen is sandwich construction; Four layers of heating platen in the middle of being positioned at comprise warming plate 95 and the alternating temperature plate 96 that lays respectively at the two sides; Can be provided with in opposite directions with this alternating temperature plate 96 that satisfies the adjacent two layers heating platen; Thereby two surfaces of slab are all contacted with alternating temperature plate 96, reach best temperature control effect.
Although illustrated and described embodiments of the invention; For those of ordinary skill in the art; Be appreciated that under the situation that does not break away from principle of the present invention and spirit and can change that scope of the present invention is limited accompanying claims and equivalent thereof to these embodiment.
Claims (10)
1. hot-pressing system that utilizes manufacturing board by crop straws; Comprise frame, be installed in the heating platen on the said frame, the driving mechanism of the said heating platen folding of driving, the control system and the heating system of control whole system work; It is characterized in that: said heating system comprises heat subsystem and low temperature cycle subsystem; Said heat subsystem and said low temperature cycle subsystem are connected with said heating platen respectively; The temperature of controlling said heating platen changes according to some cycles; Thereby said heating platen is had slab is compressed required compression temperature, slab is carried out the required forming temperature of moulding and to the temperature of the temper of sheet material, said forming temperature is lower than said compression temperature, said temperature is between forming temperature and the compression temperature.
2. a kind of hot-pressing system that utilizes manufacturing board by crop straws as claimed in claim 1; It is characterized in that: said heat subsystem comprises high temperature heat conductive oil pond, Oil Guide pump and the conduction oil closed circuit with high temperature heat conductive oil; Said conduction oil closed circuit is communicated with said high temperature heat conductive oil pond and said heating platen; Said low temperature cycle subsystem comprises low temperature heat conduction oil sump, Oil Guide pump and the conduction oil closed circuit with low temperature conduction oil, and said conduction oil closed circuit is communicated with said low temperature cycle subsystem and said heating platen.
3. a kind of hot-pressing system that utilizes manufacturing board by crop straws as claimed in claim 2; It is characterized in that: said heating system also comprises temperature sensor, control valve and control device; Said temperature sensor is used to detect temperature and each control point conduction oil temperature of heating system of said heating platen; Said control valve is used to control the break-make of said conduction oil closed circuit; Said control device produces control signal according to the temperature signal that said temperature sensor detects, and control gets into high temperature heat conductive oil or low temperature conduction oil in the said heating platen to said control valve according to control signal.
4. a kind of hot-pressing system that utilizes manufacturing board by crop straws as claimed in claim 2; It is characterized in that: the low temperature conduction oil timesharing in high temperature heat conductive oil in the said heat subsystem and the said low temperature cycle subsystem inserts same conduction oil closed circuit, and the conduction oil closed circuit in said heat subsystem and the said low temperature cycle subsystem is same conduction oil closed circuit.
5. a kind of hot-pressing system that utilizes manufacturing board by crop straws as claimed in claim 2; It is characterized in that: in the said heat subsystem with said low temperature cycle subsystem in said conduction oil closed circuit be respectively high temperature heat conductive oil closed circuit and low temperature conduction oil closed circuit; High temperature heat conductive oil in the said heat subsystem inserts said high temperature heat conductive oil closed circuit, and the low temperature conduction oil in the said low temperature cycle subsystem inserts said low temperature conduction oil closed circuit.
6. a kind of hot-pressing system that utilizes manufacturing board by crop straws as claimed in claim 2; It is characterized in that: every layer of said heating platen comprises heating plate and alternating temperature plate; The alternating temperature plate of adjacent two layers heating platen is oppositely arranged; In the said heat subsystem with said low temperature cycle subsystem in said conduction oil closed circuit be respectively heating conduction oil closed circuit and alternating temperature conduction oil closed circuit; High temperature heat conductive oil in the said heat subsystem inserts in the heating plate of said heating platen through said heating conduction oil closed circuit, and the high temperature heat conductive oil timesharing in low temperature conduction oil in the said low temperature cycle subsystem and the said heat subsystem inserts in the alternating temperature plate of said heating platen through said alternating temperature conduction oil closed circuit.
7. a kind of hot-pressing system that utilizes manufacturing board by crop straws as claimed in claim 1; It is characterized in that: every layer of said heating platen comprises warming plate and alternating temperature plate; The alternating temperature plate of adjacent two layers heating platen is oppositely arranged, and is respectively arranged with the conduction oil passage in said warming plate and the said alternating temperature plate.
8. a kind of hot-pressing system that utilizes manufacturing board by crop straws as claimed in claim 7; It is characterized in that: said heat subsystem and said low temperature cycle subsystem are connected with said alternating temperature plate respectively; Said heating system also comprises the insulation subsystem, and said insulation subsystem is connected with said warming plate.
9. a kind of hot-pressing system that utilizes manufacturing board by crop straws as claimed in claim 8; It is characterized in that: said heat subsystem comprises high temperature heat conductive oil pond, Oil Guide pump and the high temperature heat conductive oil closed circuit with first high temperature heat conductive oil and second high temperature heat conductive oil; Said first high temperature heat conductive oil and the second high temperature heat conductive oil timesharing insert said high temperature heat conductive oil closed circuit; And timesharing gets in the said alternating temperature plate; Said low temperature cycle subsystem comprises low temperature heat conduction oil sump, Oil Guide pump and the low temperature conduction oil closed circuit with the first low temperature conduction oil and second low temperature conduction oil; The said first low temperature conduction oil and the second low temperature conduction oil timesharing insert said low temperature conduction oil closed circuit, and timesharing gets in the said alternating temperature plate.
10. a kind of hot-pressing system that utilizes manufacturing board by crop straws as claimed in claim 8; It is characterized in that: said insulation subsystem comprises insulation heat conduction oil sump, Oil Guide pump and the insulation conduction oil closed circuit with insulation conduction oil, and said insulation conduction oil inserts in the said warming plate through said insulation conduction oil closed circuit.
Priority Applications (1)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102126328A (en) * | 2011-01-16 | 2011-07-20 | 铜陵华源汽车内饰材料有限公司 | Hot press |
| CN103341901B (en) * | 2013-07-11 | 2017-11-10 | 福建农林大学 | A kind of wood-based plate hot pressing fast constant-temperaturecontrol control device and method |
| CN107081925A (en) * | 2016-02-15 | 2017-08-22 | 董沛 | Hot pressing improves vegetable material quality device |
| CN107650235A (en) * | 2017-04-28 | 2018-02-02 | 扬州快乐机械有限公司 | A kind of oriented wood chipboard hot pressing unit |
| CN108189195A (en) * | 2018-03-23 | 2018-06-22 | 阜阳市宏桥建材有限公司 | A kind of straw board hot press |
| US11253898B2 (en) * | 2018-10-18 | 2022-02-22 | The Boeing Company | Hot-forming presses and methods of hot-forming workpieces |
| CN111015890A (en) * | 2019-12-25 | 2020-04-17 | 中国建筑材料科学研究总院有限公司 | Straw board hot press system |
| CN111567238A (en) * | 2020-05-18 | 2020-08-25 | 牛华阳 | Straw reducing mechanism for agricultural machine |
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| EP1340611A2 (en) * | 2002-02-28 | 2003-09-03 | Robert Bürkle GmbH | Plate press with heating and cooling system |
| CN1689777A (en) * | 2004-04-19 | 2005-11-02 | 迪芬巴赫有限两合公司 | Quick cooling method of heating plate of continuous operation press and continuous press |
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