CN207014508U - The closely knit compression hot press of softwood high temperature - Google Patents
The closely knit compression hot press of softwood high temperature Download PDFInfo
- Publication number
- CN207014508U CN207014508U CN201720622235.3U CN201720622235U CN207014508U CN 207014508 U CN207014508 U CN 207014508U CN 201720622235 U CN201720622235 U CN 201720622235U CN 207014508 U CN207014508 U CN 207014508U
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- hot press
- pressure
- compression
- lower platen
- release
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Abstract
This technology provides a kind of time that can reduce stress-relief process and will not cause the closely knit compression hot press of softwood high temperature of timber plate bursting.It includes frame, the top board being fixed in frame, slides up and down the lower platen being arranged in frame, the oil cylinder that promotion lower platen moves up and down, for monitoring by the pressure sensor of compression wood internal vapor pressure, the output of pressure sensor connects controller, and the controller that oil cylinder acts with control cylinder electrically connects.
Description
Technical field
This technology is related to the hot press that the closely knit compression of high temperature is carried out to softwood.
Background technology
The closely knit compression of softwood high temperature is to softwood, such as poplar using hot press, carries out surface high-temp compression,
So that softwood Surface compression, improves its density, the softwood of such Surface compression may act as Manufacture of Floor
Deng the raw material of product.Due to there is certain moisture in poplar, when high temperature compressed in hot press after, the water inside poplar plate core
Water vapour can be become.After the completion of boosting, pressurize, carry out unloading plate if unclamping hot press pressing plate at once, then in poplar plate core
Portion has the water vapour of certain pressure, it will plate face is gone out in rapid release, causes poplar surface to burst（That is " plate bursting "）, so as to shadow
The quality of castanets material.
Plate bursting phenomenon caused by order to prevent poplar plate core internal high temperature water vapour avulsion plate face, conventional way are to rise
It is not the pressing plate for opening hot press at once after the completion of pressure, pressurize, but increases the dwell time, and carries out cooling processing.Namely
Say, the pressure maintaining period of this practice, include in fact and the pressure maintaining period of heat-insulation pressure keeping is carried out to timber and timber is cooled
The pressurize of pressurize（Ensure that the pressure of hot press is constant）Process.When reducing to relatively low Deng Wood temperature, wood internal water vapor pressure,
Then hot press pressing plate is opened again and carries out direct release, you can prevents road surface crocking.In this sense, timber is dropped
The pressurize of warm pressurize（Ensure that the pressure of hot press is constant）Process can also regard stress-relief process as.But timber is cooled
The pressurize of pressurize（Ensure that the pressure of hot press is constant）Process, people do not know this have how long, in order to prevent direct release
After causing plate bursting, people timber can only be allowed cmpletely to cool down, then open hot press pressing plate.This way, compression certainly will be increased
In the cycle, influence production yields.
The content of the invention
The purpose of this technology is to provide a kind of time that can reduce stress-relief process and will not cause the soft of timber plate bursting
The closely knit compression hot press of matter timber high temperature.
The closely knit compression hot press of this softwood high temperature, including frame, be fixed in frame top board, slide up and down
The lower platen that is arranged in frame, promote oil cylinder that lower platen moves up and down, for monitoring by compression wood internal vapor pressure
Pressure sensor, the output of pressure sensor connects controller, and the controller that oil cylinder acts with control cylinder electrically connects.
The beneficial effect of this technology：When being compressed using this technology to timber, by monitoring in real time by high temperature compressed
The steam pressure of wood internal, and by steam pressure compared with the plate bursting critical pressure of the timber；In steam pressure >=quick-fried
During plate critical pressure, then release is carried out using segmentation destressing method, each section of segmentation release includes two steps of release and pressurize.
In steam pressure ﹤ plate bursting critical pressures, release is carried out using direct destressing method.When carrying out release using segmentation destressing method, control
Device control cylinder processed so that heating platen is slowly opened, and makes wood internal water vapour slow release, with steam-preventing avulsion plate face,
The release time is shortened while improving sheet material compression quality.When plate bursting critical pressure is direct release, timber is not in quick-fried
The wood internal top steam pressure of plate, it is that timber the wood internal minimum steam pressure of plate bursting occurs in other words.Different wood
The plate bursting critical pressure of material can be determined by testing.This hot press is in compression wood, due to that need not cool down decompression, shortens
Dwell period, moreover it is possible to improve production yields.This hot press be particularly suitable for use in poplar surface high-temp compression large-scale production, have
Preferable practical value and economic value.
In order to set different parameter values, above-mentioned hot press, it also includes the input dress being electrically connected with the controller
Put.It is touch-screen to preferably input device.
In order to ensure compression ratio of the hot press to timber, while the compression process of hot press is controlled for convenience, it is above-mentioned
Hot press, it is provided with lower platen for controlling timber by the finger gauge of compressed thickness.When uniform thickness metric contacts with top board,
Show that timber is compressed into suitable thickness, you can stop compression.
Above-mentioned hot press, it also includes being used to monitor by the temperature sensor of compression wood steam inside temperature, temperature
The output of sensor connects controller.
Brief description of the drawings
Fig. 1 is the structural representation of hot press.
Fig. 2 is the control block diagram of hot press.
Fig. 3 be in compression process poplar internal vapor pressure p with time t change curve.
Embodiment
Referring to shown in Fig. 1,2, to the hot press of the closely knit compression of poplar high temperature, including frame 1, the upper pressure that is fixed in frame
Plate 2, slide up and down the lower platen 3 being arranged in frame, the oil cylinder 4, the liquid of control cylinder action that promote lower platen to move up and down
Pressure controller 5, two finger gauges 6 being arranged on lower platen, lower platen limitation travel switch 7.Preparing the poplar 11 of compacting
Side is provided with multiple blind holes 8, for detecting the sensor of poplar steam inside temperature and pressure（Temperature, pressure integration probe）9 stretch
Enter into blind hole, the orifice sealing of blind hole.Temperature, the pressure output of sensor conveniently connect master controller（PLC）10.Hydraulic control
Device 5 is a part for master controller.On master controller also and input unit（Such as touch-screen）12nd, lower platen limitation travel switch 7
Electrical connection.
Poplar is placed on lower platen, and lower platen is gradually increasing under the drive of oil cylinder, while hot press（By steam side
The modes such as formula, Electric heating）Poplar is heated, has started to timber heat the boost process of pressurization.Boosting
During, referring to Fig. 3, steam pressure and temperature inside poplar gradually rise.When poplar is compressed to finger gauge uniform thickness,
Uniform thickness metric contacts with top board, shows that timber is compressed into suitable thickness, you can stops compression, has then begun to wood
Material carries out the pressure maintaining period of heat-insulation pressure keeping.In pressure maintaining period, steam pressure and temperature inside poplar are basically unchanged.Dwell time
Arrive, that is, start stress-relief process.In stress-relief process, no longer poplar is heated.From stress-relief process on the whole, the steaming inside poplar
The gradual reduction of steam pressure and temperature.
Stress-relief process is divided into segmentation stress-relief process and direct stress-relief process.
It is point using more than two sections in the poplar internal vapor pressure p that sensor measures >=plate bursting critical pressure p0
Section destressing method carries out release, and each section of segmentation release includes two steps of release and pressurize.Each section of segmentation release, reduce
Pressure it is equal.For the release step of each section of segmentation release, controller is slightly moved down by control cylinder, lower platen
（Slowly open）So that lower platen reduces to the pressure of top board so that poplar internal vapor pressure is reduced in 3-5s to be set
Constant-pressure；Then the pressure holding step of each section of segmentation release is carried out, that is, keeps the pressure of oil cylinder constant（Lower platen is to top board
Pressure is constant）So that poplar internal vapor pressure keeps constant, and the time is about 12s.Then the segmentation for carrying out next section again is unloaded
Pressure.Repeat to be segmented release until steam pressure p ﹤ plate bursting critical pressures p0 from this.In Fig. 3, show that 4 sections are segmented release
Process.Each section of segmentation release, the pressure of reduction are（pmax-p0）/4.
As steam pressure p ﹤ plate bursting critical pressure p0, release is carried out using direct destressing method, i.e., made by control cylinder
Obtain lower platen quickly to move down, lower platen reduces to zero suddenly to the pressure of top board.In direct stress-relief process, poplar steam inside
Pressure p gradually reduces.
This technology, to control hot press platen pressure, and measures poplar with automatic control system by temperature, pressure integration probe
Plank core temperature and steam pressure, according to the size of its steam pressure, determine to be segmented the time of release.By automatic control system control
The lower platen of heating press is slowly opened, and makes water vapour slow release inside poplar, with steam-preventing avulsion plate face, improves sheet material
Compression quality.Simultaneously because decompression need not be cooled down, press cycles are shortened, moreover it is possible to improve production yields.This method is to poplar
The high temperature compressed large-scale production of wood surface, there is good practical value and economic value.
The release of the closely knit compression of poplar is to take segmentation release and direct release to be combined.Utilize temperature, pressure integration probe
Steam during to the hot pressing of poplar inside is monitored, by surveyed steam pressure compared with plate bursting critical pressure.If poplar sandwich layer steams
Steam pressure is more than plate bursting critical pressure, then using the multistage release mode of release certain time, the certain time of stopping.If poplar sandwich layer
Steam pressure is less than plate bursting critical pressure, the then release by the way of direct release.
Specific plate bursting critical pressure parameter can be in the input unit in automatic control system（Such as touch-screen）It is upper direct
Input, facilitates production operation personnel can be according to the cottonwood plank stuff of different water cut, before the closely knit compression of surface high-temp is carried out, to quick-fried
Plate critical pressure parameter is set.
The closely knit compression hot press of this poplar surface high-temp has following innovation：
（1）Poplar is compressed using this hot press, it will greatly shortens the dwell time.Traditional dwell time length, its is main
Reason is the release after being easy in order that plank sandwich layer steam pressure slowly lowers, and prevents from causing during the unexpected release of sheet material
Plate surface explosion.And this hot press is the size by detecting plate core steam pressure in real time, decision is to be segmented release also
It is direct release mode, to prevent plate bursting.So the dwell time can be shortened, so as to shorten press cycles.
（2）The release of traditional hot press is all to lean on worker's micro-judgment to operate, and easily produces plate surface explosion.With
Manual hand manipulation compares, and this hot press automatically controls whole poplar compression process, its segmentation used using PLC TT＆C systems
Release mode will be better than traditional release mode, improve production efficiency and the qualification rate of product.
（3）With reference to input unit（Such as touch-screen）, staff can according to situations such as the different water cut of cottonwood plank stuff,
The compression initiation parameter such as different temperatures, pressure, release interval time, plate bursting critical pressure is set on the touchscreen, facilitates poplar
The progress of wooden compression process.
Claims (5)
1. the closely knit compression hot press of softwood high temperature, including frame, be fixed in frame top board, slide up and down setting
The oil cylinder that lower platen, promotion lower platen in frame move up and down；It is characterized in that：It also includes being used to monitor by compression wood
The pressure sensor of internal vapor pressure, the output of pressure sensor connect controller, oil cylinder and the controller of control cylinder action
Electrical connection.
2. hot press as claimed in claim 1, it is characterized in that：It also includes the input unit being electrically connected with the controller.
3. hot press as claimed in claim 2, it is characterized in that：Input unit is touch-screen.
4. hot press as claimed in claim 1, it is characterized in that：It is provided with lower platen for controlling timber by compressed thickness
Finger gauge.
5. hot press as claimed in claim 1, it is characterized in that：It also includes being used to monitor by compression wood steam inside temperature
Temperature sensor, the output of temperature sensor connects controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720622235.3U CN207014508U (en) | 2017-06-01 | 2017-06-01 | The closely knit compression hot press of softwood high temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720622235.3U CN207014508U (en) | 2017-06-01 | 2017-06-01 | The closely knit compression hot press of softwood high temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207014508U true CN207014508U (en) | 2018-02-16 |
Family
ID=61477000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720622235.3U Expired - Fee Related CN207014508U (en) | 2017-06-01 | 2017-06-01 | The closely knit compression hot press of softwood high temperature |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207014508U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106985226A (en) * | 2017-06-01 | 2017-07-28 | 南京沪友冶金机械制造有限公司 | The closely knit compression hot press of softwood high temperature |
| CN110466015A (en) * | 2019-08-12 | 2019-11-19 | 百隆智能家居有限公司 | A kind of multi-layered board hot press |
-
2017
- 2017-06-01 CN CN201720622235.3U patent/CN207014508U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106985226A (en) * | 2017-06-01 | 2017-07-28 | 南京沪友冶金机械制造有限公司 | The closely knit compression hot press of softwood high temperature |
| CN110466015A (en) * | 2019-08-12 | 2019-11-19 | 百隆智能家居有限公司 | A kind of multi-layered board hot press |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180216 Termination date: 20180601 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |