CN202528291U - Spray evaporation cooling hot press - Google Patents
Spray evaporation cooling hot press Download PDFInfo
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- CN202528291U CN202528291U CN2011205087910U CN201120508791U CN202528291U CN 202528291 U CN202528291 U CN 202528291U CN 2011205087910 U CN2011205087910 U CN 2011205087910U CN 201120508791 U CN201120508791 U CN 201120508791U CN 202528291 U CN202528291 U CN 202528291U
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- hot pressing
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Abstract
The utility model provides a spray evaporation cooling hot press which can shorten cooling time, improve productivity and effectively prevent a plate from being cracked and is used for producing a single-sided compressed wooden plate. The spray evaporation cooling hot press comprises two hot pressing plates which are disposed vertically, and a cylinder drives the lower hot pressing plate to move up and down relative to the upper hot pressing plate. The spray evaporation cooling hot press is characterized in that steam channels are disposed in the lower hot pressing plate; steam outlet holes communicated with the evaporation channels are disposed in the hot pressing surface of the lower hot pressing plate; the diameter of each steam outlet hole is less than 1mm; the steam channels are communicated with a steam source; a heating device used for heating the lower hot pressing plate is disposed on the lower hot pressing plate; and cooling channels communicated with a cooling medium are disposed in the lower hot pressing plate.
Description
Technical field
The single face compressed wood lumber that present technique relates to a kind of steam injection pressing machine, utilizes the steam injection pressing machine to produce.
Background technology
The steam injection pressing machine is used for the production of wooden boards; Generally comprising two relative up and down heating platens is upper hot pressboard and lower hot pressing board; Lower hot pressing board is provided with and drives the oil cylinder that lower hot pressing board moves up and down with respect to upper hot pressboard; In two heating platens, be provided with steam channel in all, on the hot pressing face of two heating platens, have the vapor opening that communicates with said steam channel; Steam channel communicates with vapour source; On two heating platens, be provided with heater (like electric heater unit or oil heating unit) to the heating platen heating.
When using this steam injection pressing machine to produce wooden boards; Put into the slab behind the assembly between two heating platens earlier; Through heater two heating platens are heated to uniform temperature simultaneously, and drive lower hot pressing board through oil cylinder and move with respect to upper hot pressboard and slab is pressurizeed.In the process to the equal heating and pressurizing in top and bottom of slab, the steam through vapour source short time spray pressure in steam channel makes steam penetrate into the upper and lower surfaces of slab, softening timber (make sheet material be compressed more easily, shorten compression time); When the compression ratio of slab reaches requirement by the time, stop, treating that slab cools off the back naturally the oil cylinder release is promptly got two-sided single face compressed wood lumber two heating platen heating.
The steam injection pressing machine is mainly used in the production of low-density fast growing wood, can improve its density through heating and pressurizing, strengthens its mechanical property.Spraying steam makes that heat transfer is faster, and high-temperature steam can soften timber simultaneously, can make wood surface compress with less pressure.But the problem of its existence is: 1, slab time of cooling off naturally longer, production efficiency is low.But can not shorten cool time again, if because slab not fully cooling just to the oil cylinder release, the high steam in the slab upper and lower surfaces can be rapidly ejection and cause " plate bursting " to make slab ftracture in the slab.2, in the last lower hot pressing board of this steam injection pressing machine heater and steam channel are arranged all,, make the upper and lower surfaces of slab all be compressed, so obtain two-sided compressed wood lumber so the upper and lower surfaces of its slab heats simultaneously and spraying steam.Though this two-sided its upper and lower surfaces of compressed wood lumber all has the advantage that hardness is high, wearability is good, in practical application, may not be of practical significance.For example, for the floor, upper surface hardness is high, wearability is just good generally only to need it to mat formation, and lower surface hardness is high, wearability does not well not only have practical significance.For another example, for the sheet material that is used to make furniture, only need also generally that outer surface hardness is high, wearability is just good, the advantage that inner surface hardness is high, wearability is good also is not used.3, slab by two-sided compression after, reduced the utilization rate (having caused in other words, the waste of timber) of timber.For instance; In order to obtain the two-sided compressed wood lumber that final thickness is 2cm; The upper and lower surfaces of supposing sheet material is being 15% (compression ratio that is equivalent to slab is 30%) with the compression ratio in the preparation process of steam injection pressing machine, the 2.85cm ((2.85-2)/2.85*100%=30%) that just needs with regard to the thickness of the slab before the hot pressing so.
Summary of the invention
The purpose of present technique provides and a kind ofly can shorten cool time, boosts productivity and prevents that effectively the spray that is used to produce single face compressed wood lumber of sheet material cracking from steaming heat of cooling press.
Heat of cooling press is steamed in the spray of present technique; Comprise two relative up and down heating platens; Oil cylinder drives the relative upper hot pressboard of lower hot pressing board and moves up and down; It is characterized in that: in lower hot pressing board, be provided with steam channel, have the vapor opening that communicates with said steam channel at the hot pressing face of lower hot pressing board, the vapor opening diameter is less than 1mm; Steam channel communicates with vapour source; Lower hot pressing board is provided with the heater to the lower hot pressing board heating; In lower hot pressing board, be provided with the cooling duct that communicates with cooling medium.
The beneficial effect of heat of cooling press is steamed in the spray of present technique: 1, this spray is steamed heat of cooling press and is steamed passage owing to only in a heating platen, being provided with heater and spraying; So just one of slab (with being provided with heater and spray and steaming that the heating platen of passage contacts) active heating surface is heated and sprays into steam, so should can soften and be compressed by the surface wood fibre; And the another one of slab surface (not heating surface) be not heated, and do not sprayed into steam yet, thus this not heated surface can not be compressed basically, thereby make single face compressed wood lumber.Not only more practical, also reduced compression loss, practiced thrift timber.For instance; In order to obtain the single face compressed wood lumber that final thickness is 2cm; A surface supposing sheet material is 15% (compression ratio that is equivalent to slab is 15%) in the compression ratio of using spray to steam in the preparation process of heat of cooling press, and the thickness with regard to the slab before the hot pressing only needs 2.35cm ((2.35-2)/2.35*100%=15%) so.2, can boost productivity.Sheet material be heated be pressurized to the compression ratio that needs after; Stop the heating platen heating promptly can be lowered the temperature to heating platen through the cooling duct by cooling medium, sheet material is also lowered the temperature thereupon certainly; The steam of the HTHP that sheet material is inner is also by decrease temperature and pressure; That is to say, cool off the inner steam pressure of timber when having reduced hot pressing, prevented " plate bursting " and the cracking of sheet material; Also shorten the time of sheet material in hot press, improved productivity ratio.Why steam channel, vapor opening are arranged in the lower hot pressing board; Rather than be arranged in the upper hot pressboard, if be to be arranged in the upper hot pressboard, when upper hot pressboard spray steam because of steam channel, vapor opening; Can fall on the lower hot pressing board by current, the lower surface of timber is impacted.Why the vapor opening diameter is less than 1mm, is in order to make steam have enough pressure energies enough to get into the inside of slab, to make that steam entering slab inside is darker.
Though heater and steam channel are arranged in the lower hot pressing board; But aborning; (the contacting) of slab with lower hot pressing board initiatively heating surface also can make because of conduction (contacting) with upper hot pressboard not the heating surface temperature raise gradually and make wood fibre soften; That is to say that the not heating surface of sheet material also possibly be compressed in process of production.For preventing this situation, heat of cooling press is steamed in described spray, in upper hot pressboard, also is provided with the cooling duct that communicates with cooling medium.Like this, when through heater (contacting with the active heating surface of sheet material) upper hot pressboard being heated, the logical cooling medium of (contacting with the not heating surface of sheet material) lower hot pressing board cools off, and has prevented that the heating surface temperature does not raise and is compressed.
Heat of cooling press is steamed in described spray, and cooling medium is water preferably.
Present technique provides a kind of practicality more simultaneously and has improved the single face compressed wood lumber of timber utilization rate.
This single face compressed wood lumber is to use above-mentioned spray steaming heat of cooling press to produce according to following method:
A. be lower than 15% slab to moisture content and put between two heating platens, through heater lower hot pressing board is heated to uniform temperature, drive that lower hot pressing board moves with respect to upper hot pressboard and to the slab pressurization through oil cylinder according to conventional method,
B. in steam channel, spraying for the first time pressure through vapour source is 5-8 atmospheric steam 5-10 second,
When the compression ratio of c. waiting until slab reaches requirement; Heat-insulation pressure keeping stops after a period of time heating platen is heated; The cooling duct is fed cooling medium lower hot pressing board is cooled off, after board briquette is lower than 100 ℃, the oil cylinder release is promptly got this single face compressed wood lumber.
The single face compressed wood lumber beneficial effect of present technique: this method just heats (contact with lower hot pressing board) active heating surface of slab and sprays into steam, so should can soften and be compressed by the surface wood fibre; And the another one of slab surface (not heating surface) be not heated, and do not sprayed into steam yet, thus this not heated surface can not be compressed basically, thereby make single face compressed wood lumber.Not only more practical, also reduced compression loss, practiced thrift timber.
If only spray primary steam, the sheet material that makes just big near the very near inner place of sheet material (wearing layer) density of active heating surface, wearability good, initiatively the dark slightly sheet material internal density of heating surface does not change yet, wearability is bad in distance.In general, wearing layer (center) to sheet material initiatively the distance of heating surface approximately be 0.5-0.8mm.But because the wearing layer that density is big, wearability is good is too near from plate surface, wearing layer might be removed because of processing in the following process process (as scraping or sanding) of sheet material.For this reason, above-mentioned single face compressed wood lumber, b ' in steps behind step b, before the step c: behind first time spraying steam after 4-6 minute, in steam channel, spray pressure for the second time and be 5-8 atmospheric steam 5-10 second.Like this,, can make the wearing layer that density is big, wearability is good move to the inside of sheet material gradually, make the wearing layer enlarged in thickness through twice spraying steam, in general, wearing layer (center) to sheet material initiatively the distance of heating surface approximately be 2.0-2.5mm.So both made through following process, wearing layer also can remain.
Above-mentioned single face compressed wood lumber among the step a, is heated to 160-170 ℃ to lower hot pressing board; Oil cylinder 30-45 pressing time minute, the compression ratio of slab is 15-18% among the step c.
A purpose again of present technique provides a kind of production efficiency height and guarantees the production method of the single face compressed wood lumber of product quality.
The production method of the single face compressed wood lumber of present technique is that above-mentioned spray steaming heat of cooling press is produced according to following method:
A. be lower than 15% slab to moisture content and put between two heating platens, through heater lower hot pressing board is heated to uniform temperature, drive that lower hot pressing board moves with respect to upper hot pressboard and to the slab pressurization through oil cylinder according to conventional method,
B. in steam channel, spraying for the first time pressure through vapour source is 5-8 atmospheric steam 5-10 second,
When the compression ratio of c. waiting until slab reaches requirement; Heat-insulation pressure keeping stops after a period of time heating platen is heated; The cooling duct is fed cooling medium heating platen is cooled off, after board briquette is lower than 100 ℃, the oil cylinder release is promptly got this single face compressed wood lumber.
The beneficial effect of this production method: after two heating platens close up, the steam of spray band pressure, it is faster to make that wood materials conducts heat; Simultaneously, sheet material be heated be pressurized to the compression ratio that needs after, stop heating platen being heated; Promptly can through the cooling duct heating platen be lowered the temperature by cooling medium; Certainly sheet material is also lowered the temperature thereupon, and the steam of the HTHP that sheet material is inner that is to say also by decrease temperature and pressure; Cool off the inner steam pressure of timber when having reduced hot pressing, prevented " plate bursting " and the cracking of sheet material; Also shorten the time of sheet material in hot press, improved productivity ratio, and guaranteed product quality.
Above-mentioned production method, b ' in steps behind step b, before the step c: behind first time spraying steam after 4-6 minute, in steam channel, spray pressure for the second time and be 5-8 atmospheric steam 5-10 second.
Above-mentioned production method among the step a, is heated to 160-170 ℃ to lower hot pressing board; Oil cylinder 30-45 pressing time minute, the compression ratio of slab is 15-18% among the step c.
Description of drawings
Fig. 1 is that heat of cooling press sketch map is steamed in spray
Fig. 2 is the R-R cutaway view of the lower hot pressing board among Fig. 1.
Fig. 3 is the sketch map of the single face compressed wood lumber that makes.
The specific embodiment
Steam heat of cooling press referring to the spray shown in Fig. 1-2, comprise that two relative up and down heating platens are lower hot pressing board 1 and upper hot pressboard 2, the lower hot pressing board bottom links to each other with respect to the oil cylinder 3 that upper hot pressboard moves up and down with the drive lower hot pressing board.In lower hot pressing board 1, be provided with a plurality of parallel steam channel 4, deep fat passage 5, cooling duct 6.On the hot pressing face 11 of lower hot pressing board 1, have a plurality of vapor openings 41 that communicate with said steam channel; Vapor opening has multiple row, and each vapor opening diameter is less than 1mm; Steam channel communicates with vapour source.Deep fat passage 5 communicates with the deep fat source, and the cooling duct communicates with cooling water source.In upper hot pressboard 2, also be provided with the cooling duct 7 that communicates with cooling water source.
The step of using it to produce single face compressed wood lumber is following:
A. be lower than moisture content 15% the living poplar slab of speed (the about 0.4g/mm of density
3) put between two heating platens, the deep fat passage in the lower hot pressing board is fed deep fat, lower hot pressing board is heated to 160-170 ℃, drive lower hot pressing board through oil cylinder and move and slab is pressurizeed to upper hot pressboard; Simultaneously the logical cooling water in the cooling duct in the upper hot pressboard is cooled off upper hot pressboard.
B. be 5-8 atmospheric steam 5-10 second through spraying for the first time pressure in the steam channel of vapour source in lower hot pressing board,
B '. after 4-6 behind first time spraying steam (preferred 5min) minute, spray pressure in the steam channel in lower hot pressing board for the second time and be 5-8 atmospheric steam 5-10 second.
When the compression ratio of c. waiting until slab reaches 15-18%, stop, the cooling duct in the lower hot pressing board is fed after cooling water cools off lower hot pressing board, the oil cylinder release is promptly got this single face compressed wood lumber 8 steam channel (heat tunnel) heat supply.About 30-45 of total time minute of oil cylinder pressurization.
Referring to Fig. 3, through this single face compressed wood lumber 8 of test, the density change is big, and (averag density is more than or equal to 0.6g/mm
3), the about 2.0-2.5mm of distance on wearing layer 9 centre-to-centre spacing top layers 10 that wearability is good, in fact, the density of wearing layer 9 is also being different apart from top layer 10 apart from different places, so its density is more than or equal to 0.6g/mm
3Be meant that also averag density is more than or equal to 0.6g/mm
3Adopted simplified painting among Fig. 4, wearing layer 9 has adopted different hatchings with other part of single face compressed wood lumber 8, to show difference.
Why require the initial aqueous rate of slab to be lower than 15%, if be because the initial aqueous rate is too high, add spraying steam, the moisture content of slab will be too high, and make slab compression and damage.
Claims (3)
1. heat of cooling press is steamed in spray; Comprise two relative up and down heating platens; Oil cylinder drives the relative upper hot pressboard of lower hot pressing board and moves up and down; It is characterized in that: in lower hot pressing board, be provided with steam channel, have the vapor opening that communicates with said steam channel at the hot pressing face of lower hot pressing board, the vapor opening diameter is less than 1mm; Steam channel communicates with vapour source; Lower hot pressing board is provided with the heater to the lower hot pressing board heating; In lower hot pressing board, be provided with the cooling duct that communicates with cooling medium.
2. heat of cooling press is steamed in spray as claimed in claim 1, it is characterized in that: in upper hot pressboard, also be provided with the cooling duct that communicates with cooling medium.
3. heat of cooling press is steamed in spray as claimed in claim 1, and it is characterized in that: cooling medium is a water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205087910U CN202528291U (en) | 2011-12-09 | 2011-12-09 | Spray evaporation cooling hot press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205087910U CN202528291U (en) | 2011-12-09 | 2011-12-09 | Spray evaporation cooling hot press |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202528291U true CN202528291U (en) | 2012-11-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205087910U Expired - Fee Related CN202528291U (en) | 2011-12-09 | 2011-12-09 | Spray evaporation cooling hot press |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202528291U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102423889A (en) * | 2011-12-09 | 2012-04-25 | 南京林业大学 | Spray evaporation cooling hot press, and single-sided compressed wooden plate and production method thereof |
| CN109746988A (en) * | 2019-01-14 | 2019-05-14 | 浙江农林大学 | Air-blowing cooling device, continous way heat into it is cold go out hot press and its continuous cooling method |
-
2011
- 2011-12-09 CN CN2011205087910U patent/CN202528291U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102423889A (en) * | 2011-12-09 | 2012-04-25 | 南京林业大学 | Spray evaporation cooling hot press, and single-sided compressed wooden plate and production method thereof |
| 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 |
| CN109746988A (en) * | 2019-01-14 | 2019-05-14 | 浙江农林大学 | Air-blowing cooling device, continous way heat into it is cold go out hot press and its continuous cooling method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121114 Termination date: 20141209 |
|
| EXPY | Termination of patent right or utility model |