CN102303340A - Stable type double-layer ground-heating solid wood floorboard and method for manufacturing same - Google Patents
Stable type double-layer ground-heating solid wood floorboard and method for manufacturing same Download PDFInfo
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- 238000000889 atomisation Methods 0.000 claims description 22
- 238000013459 approach Methods 0.000 claims description 16
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- 241000018650 Pinus massoniana Species 0.000 claims description 11
- 235000005456 Pinus sylvestris var mongolica Nutrition 0.000 claims description 11
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Abstract
The invention relates to wood functional improvement methods, in particular to a stable type double-layer ground-heating solid wood floorboard and a method for manufacturing the same, belonging to the technical field of solid wood floorboard processing. The invention has the technical scheme that the method comprises the following steps of: (1) wood veneer and substrate manufacturing; (2) drying; (3) charring heat treatment; (4) water ratio callback; and (5) veneering and fixing. Compared with the prior art, the technical scheme provided by the invention ahs the advantages of simple production process, short production cycle, low energy consumption, low production cost, high out-turn percentage and the like. The manufactured double-layer ground-heating solid wood floorboard has the advantages of better dimensional stability, more comfortable foot feeling because of hard surface and soft bottom, capability of being applied to ground heating and longer service life. In addition, the problem that the traditional wood veneer is easy to be subjected to tile deformation and cracking is solved, and a new technique for wood charring heat treatment is further provided.
Description
Technical field
The present invention relates to the lumber functionality improvement method, relate in particular to a kind of stable dual-layer ground heating solid wooden floor board and manufacturing approach thereof, belong to the solid wooden floor board processing technique field.
Background technology
Usually said wooden skin is that the thickness that uses dry sawn timber after good to obtain through buck saw, band saw or multiple blade saw subdivision is that the thin plate of 2～5mm is called wooden skin, and wooden skin is normally as the material of solid wooden compound floor.The wooden skin that after dry sheet material saw system, obtains, equilibrium moisture content is high, receives the influence that ambient temperature and humidity changes easily; Cause its tile distortion easily; The distortion of the tile that has big in addition cracking, perhaps being out of shape also has very most of cracking that produces when little being used to produced solid wooden compound floor and forced to restore, even and be made into solid wooden compound floor; Also make floor deformation easily, reduce product quality.The tile strain cracking of wooden skin has not only increased difficulty of processing, reduced the volume recovery of timber but also has increased the enterprise operation cost in addition.
The fast growing wood fast growth, material is soft, the cracking that deforms easily, the blue stain that goes mouldy easily, service life is short, thereby makes fast growing wood can only be applied to semi-finished product such as low value-added glued board, fiberboard, core-board all the time.The common used base material of solid wooden compound floor is a glued board at present in addition; Being subject to the used adhesive of cost glued board is Lauxite; This exists the great problem of burst size of methanal, uses especially for ground heating, and this problem is just more outstanding; And its base material end is treated, takes place rotten easily and makes floor service life shorten.
Chinese patent document CN1928298A discloses " formaldehyde-free stable dual-layer wood composite floor board and preparation method thereof " technical patent; Its preparation method comprises; A. the fast growing wood with cheapness is a base material, and sawing becomes 15～18mm thickness as floor base material, and base material is carried out artificial drying; Adopt wood carbonization method that base material is carried out stabilization processes dried base material, the base material moisture content after it is handled is less than 10%; B. adopting the method for slicing or sawing that precious timber is made into thickness is the epidermis of 0.6～5mm as the floor; And this epidermis is carried out artificial drying; Adopt wood carbonization method that this epidermis is carried out stabilization processes then, handle back epidermis moisture content less than 10%; C. respectively base material and epidermis are carried out sanding; D. adopt formaldehydeless anhydrous glue and with cold-press method base material that sanding is good and the epidermis pressing formation dual-layer wood floor that bonds together; E. will be through bonding and the good dual-layer wood floor of the method pressing health 10～30 hours in room temperature or balance room of colding pressing; F. the dual-layer wood floor after health is handled, fixed thick sanding, making tongue and groove, edge sealing and top finishing is promptly got the formaldehyde-free stable dual-layer wood floor finished product after handling.The carbonizing treatment method that is adopted is: 1. will press 1t/m as base material or as the neat piling of the timber of epidermis and at timber heap top
2Standard compression steel plate frame pouring concrete briquetting, in the traditional carbonization of wood equipment of the timber of packing into then; 2. timber is packed into behind the charing equipment; Begin to heat up, the phase I of heating up is adopted ladder or continuous temperature-rising method, and temperature is warming up to 130 ℃ by the speed that improved 5 ℃ in per 5 hours; Promptly keep 5h after 5 ℃ heating up on the original temperature basis rapidly; Be elevated to 130 ℃ to temperature with identical method then, under 130 ℃ of conditions, be incubated 5h, first temperature rise period finished; 3. second temperature rise period was adopted the continuous temperature-rising method of staged, and the speed that improved 10 ℃ by per 2 hours is warmed up to 210 ℃, and under 210 ℃ of temperature, keeps 4 hours, and the charing processing finishes; 4. after treating that the charing processing finishes, close the charing treatment facility and add valve, stop heating; Open the atomized water device valve, jet atomization water in charing equipment makes timber cool to 100 ℃; The saturated vapor that in charing equipment, feeds 100 ℃ then carries out damping processing moisture regain processing to timber floor; Processing time is 6 hours, and moisture content is got damp again less than 10%, is preferably 6%; 5. at last with timber in charing equipment, naturally cool to temperature be higher than indoor 15～30 ℃ after kiln discharge.Find out first from technique scheme: the used charing heat treatment technics processing time is long, and energy consumption is high, yields poorly; Second: the epidermis that obtains 0.6～5mm through the method for slicing or sawing; Individual wooden skin is put not point-blank for layer or parting bead or parting bead is gone up greater than 5cm apart from wooden skin termination and is easy to generate distortion, tile through facts have proved when adopting artificial drying, and is particularly just more serious for very thin these defectives of wooden skin; The 3rd: the coefficient of shrinkage of fast growing wood is greater than hard broadleaf, and promptly the two is after same technology charing heat treatment, and the coefficient of shrinkage of fast growing wood is still greater than hard broadleaf; Therefore; Cross the floor that thin wooden skin production obtains the front tile takes place easily, blocked up wooden skin can guarantee the floor dimensionally stable, but the waste precious timber; Increase product cost; The experiment proof is to comprising the composite floor board of double floor, and thickness floor stability between 2.0～3.2mm of panel wood skin reaches the highest few again with material, here because panel can balance the stress from base material; The the 4th: be higher than more than 15% like the thick moisture content of fast growing wood base material 15～18mm,, base material generation table split and implosion, fall the volume recovery of sill material by above-mentioned charing heat treatment; The 5th: as the fruit tree skin be through independent charing heat treated with base material be heat treated through independent charing, the two equilibrium moisture content is inhomogeneous, through the floor that is made into regard to easy deformation.
Chinese patent document CN1868704A discloses " a kind of Wood carbonization treatment method " technical patent, and its manufacturing approach comprises that a. piles the top by 1t/m with the neat piling of timber and at timber
2Standard compression steel plate frame pouring concrete briquetting, in the carbonization of wood equipment of packing into then; B. in carbonization of wood equipment, adopt the continuous temperature-rising method of staged, temperature is warming up to 120～140 ℃ by the speed that improved 3～7 ℃ in per 4～6 hours; C. adopt the continuous temperature-rising method of staged, the speed that improved 8～12 ℃ by per 1～3 hour is warming up to 160～240 ℃, and under maximum temperature, keeps 3～6 hours, and the charing processing procedure finishes; D. after treating that charing finishes, stop heating, adopt atomization water method to let timber slowly cool to 100 ℃, the saturated vapor that feeds 100 ℃ then carries out damping moisture regain processing to timber, and the processing time is 6～8 hours, and the moisture content of timber is adjusted back 4～6%; E. timber is cooled to temperature under field conditions (factors) and is higher than 15～30 ℃ of kiln discharges of room temperature.It is long that such scheme charing processing scheme exists the production cycle, and energy consumption is high, yields poorly.
Chinese patent document CN101069972A discloses " a kind of preparation method of heat-treatment charred wood " technical patent; Its step comprises: (1) preparatory stage: with the pending timber of moisture content≤12%; Put into carbonization of wood kiln by conventional drying method stacking, and close the gate and the inlet and outlet mouth of carbonization of wood kiln: (2) warm-up phase: medium temperature in the kiln is raised to 50～80 ℃ in 1～3h; (3) temperature rise period: medium temperature in the kiln is warmed up to 95～105 ℃ with the speed of 10～18 ℃/h; Then be warmed up to 120～130 ℃ material carried out high temperature drying, and the inner moisture content of timber almost drops to 0 with the speed of 3～8 ℃/h; Speed with 12～20 ℃/h is warmed up between 185～220 ℃ again; In this temperature rise period, adopting batch (-type) spray steaming method to spray to steam handles; (4) holding stage: after medium temperature in the kiln reaches desired temperature, keep kiln temperature between 185～220 ℃, keep carbonization temperature 2～8h; (5) temperature-fall period: close thermal source, adopt the cooling of batch (-type) spray steaming method, make the interior medium temperature of kiln cool to 120～140 ℃ with the speed of 12～18 ℃/h; Then adopt porting folding at intermittence and batch (-type) spray steaming method to lower the temperature, make the interior medium temperature of kiln cool to 70～85 ℃, adopt batch (-type) spray steaming method to spray steaming and handle, keep 1～4h, make moisture content reach 4～9% with the speed of 4～8 ℃/h; Naturally reduce to the room temperature kiln discharge again.It is long that such scheme still exists the production time, and energy consumption is high, yields poorly.
Summary of the invention
When the objective of the invention is to solve the problems referred to above of prior art, providing a kind of more stabilization energy to be applied to the solid wooden floor board manufacturing approach of ground heating, specifically is a kind of stable dual-layer ground heating solid wooden floor board and manufacturing approach thereof; Compared with prior art; It is simple that technical scheme of the present invention has production technology, with short production cycle, and energy consumption is low; Production cost is low, timber volume recovery advantages of higher.The double-deck ground heating solid wooden floor board dimensional stability that manufacturing obtains is better, and it is more comfortable to have the table weak foot sense of the hard end, can be applied to ground heating, longer service life.Also solved existing wooden skin the tile strain cracking has taken place easily, a kind of new carbonization of wood heat treatment technology is provided in addition.
The invention provides a kind of stable dual-layer ground heating solid wooden floor board manufacturing approach, it may further comprise the steps:
(1) wooden skin and base material making step: hard broad-leaved wood saw is processed the thick wooden skin of 2.2～3.6mm, the fast growing wood saw is processed the thick base material of 12.8～17.5mm;
(2) drying steps: hard broad-leaved timber skin is carried out drying make its moisture content≤15%, fast growing wood base material drying is made its moisture content≤8%;
(3) charing heat treatment step: the Fast Heating humidification directly is warmed up to 180～210 ℃ condition wooden skin and base material is carried out charing heat treatment in heat treatment kiln;
(4) moisture content readjustment step: after carrying out the moisture content readjustment in the charing heat treatment kiln or going out the charing heat treatment kiln, in dry kiln, carry out the moisture content readjustment, moisture content is 7～11%;
(5) gummed fixing step: wooden skin and base material all through after the sanding, are carried out applying glue and glue together wooden skin stickup along base material grain direction fixing to base material.
As preferably, said wooden skin and base material making step are: hard broad-leaved wood saw is processed the thick wooden skin of 2.2～3.6mm, the fast growing wood saw is processed the thick base material of 12.8～17.5mm.
As preferably, said drying steps: be that to be superimposed 2～5 veneer skins be folded whole, adopt the pallet and the aluminium alloy parting bead of uniform specification; During stacking parting bead apart from wooden skin end face in 5cm; Stiker spacing is at 10～20cm, and parting bead is neatly upwards in alignment at hard Nogata, setting-out clod on the good wooden skin heap of stacking; It is dry to place the advanced promoting the circulation of qi of the dried canopy of gas to do; After move on to and carry out the kiln drying drying in the dry kiln, or directly place dry kiln to carry out conventional drying, make moisture content≤15% of wooden skin.
Preferred as another, said drying steps: be that to be superimposed 2～5 veneer skins be folded whole, adopt the pallet and the aluminium alloy parting bead of uniform specification; During stacking parting bead apart from wooden skin end distance below 5cm; Stiker spacing is at 10～20cm, and parting bead is neatly upwards in alignment at hard Nogata, setting-out clod on the good wooden skin heap of stacking; Place dry kiln directly to carry out conventional drying, make moisture content≤15% of wooden skin.
As preferably, said drying steps: be that to be superimposed 2～3 plate substrates be folded whole, adopt the pallet and the aluminium alloy parting bead of uniform specification; During stacking parting bead apart from the base material end face in 5cm; Stiker spacing is at 10～20cm, and parting bead is neatly upwards in alignment at hard Nogata, setting-out clod on the good base material heap of stacking; It is dry to place the advanced promoting the circulation of qi of the dried canopy of gas to do; After move on to and carry out the kiln drying drying in the dry kiln, or directly place dry kiln to carry out conventional drying, make moisture content≤8% of base material.
Preferred as another, said drying steps: be that to be superimposed 2～3 plate substrates be folded whole, adopt the pallet and the aluminium alloy parting bead of uniform specification; During stacking parting bead apart from the base material end distance below 5cm; Stiker spacing is at 10～20cm, and parting bead is neatly upwards in alignment at hard Nogata, setting-out clod on the good base material heap of stacking; Place dry kiln directly to carry out conventional drying, make moisture content≤8% of base material.
Preferred as a nearlyer step, said drying steps: be that dry substrate makes its moisture content≤6%.
Wooden skin is dried to moisture content≤15%, because thin its permeability of wooden skin is all right, the moisture gradient on the thickness direction is little, and the stress of wooden intracutaneous is little, then can adopt the fast charring Technology for Heating Processing.Will be dried to very low moisture content to the fast growing wood base material, also be to prevent that fast growing wood from defectives such as table splits, implosion, distortion not taking place in the fast charring heat treatment process.Select first gas to do back kiln drying combined drying technology in addition, this is because in the process of gas drying, the high air quantity of day temperature is big; Play dry effect, but to evening temperature low, the timber ambient humidity, light and temperature is big; Played the effect of Balance Treatment, low inside and high outside moisture content make timber the inside moisture content outward wood surface move, thereby it is dry to form daytime; This circulation of balance in evening, thus can effectively overcome the generation of drying of wood residual stress, and weakened the origin cause of formation of base material shrinkage.And this still is a kind of drying means of energy-conserving and environment-protective.
As preferably; Said charing heat treatment step: be directly to send dry good wooden skin and the base material of dry kiln together in the charing heat treatment kiln with fork truck; Close the heat treatment wicket, open heating and humidification valve simultaneously, the Fast Heating humidification directly is warmed up to 180～210 ℃ wooden skin and base material is carried out charing heat treatment 2～4h; Close after the end when adding thermal recovery jet atomization water method and letting in the charing heat treatment kiln fast cooling to 120～125 ℃, finish atomization water and stop humidification.
Dry wooden skin moisture content is reduced to≤and 15%; Dry substrate moisture content≤8%; Adopt the Fast Heating humidification to heat up and directly wooden skin is carried out charing heat treatment to 180～210 ℃; The residual stress that in Fast Heating humidification temperature-rise period, is produced; Mutual superposition wooden skin and base material together balances its stress part separately, and the disposing way of the pallet of uniform specification and aluminium alloy parting bead and parting bead also can balance wooden skin and base material remainder residual stress separately, thereby has prevented that wooden skin and base material from producing the strain cracking defective in heat treatment process.And adopt wooden skin stack and base material to be superposed to a folded whole mode and heat-treat, promptly do not influence the quality of charing heat treatment wood skin and base material, guarantee the flatness of resultant wooden skin of heat treatment and base material again.
Preferred as further, said charing heat treatment step: be will keep dry-bulb temperature greater than 20～30 ℃ of wet-bulb temperature when wet-bulb temperature is less than 100 ℃ in Fast Heating humidification temperature-rise period,, keep being full of steam in the kiln until wet-bulb temperature >=100 ℃.
As preferably; Said moisture content readjustment step: be in the charing heat treatment kiln, to finish atomization water and stop humidification; When being cooled to 100 ± 5 ℃ naturally, opening humidification again and adopt 100 ℃ of steams that wooden skin and base material are carried out gas to steam moisture content and adjust back 4～10h, make wooden skin and base material moisture content after the heat treatment adjust back 7～11%; Finish gas and steam, get final product kiln discharge when cooling to interior 40～60 ℃ of kiln naturally.
Preferred as another, said moisture content readjustment step: be to finish atomization water and stopping humidification, shift out wooden skin and base material with fork truck when cooling to interior 40～60 ℃ of kiln naturally and place and carry out moisture content in the dry kiln and adjust back 7～11%.
As preferably; Said gummed fixing step: after all adopting the above abrasive band of 140 orders to carry out sanding to wooden skin and base material; Carry out applying glue and paste gummed to wooden skin sanding face fixing to base material sanding face along base material grain direction; Health 2～7 days is again after machining, mortise fluting, UV application and the stable dual-layer ground heating solid wooden floor board that obtains.
The present invention also comprises the stable dual-layer ground heating solid wooden floor board of a kind of stable dual-layer ground heating solid wooden floor board manufacturing approach gained; It comprises that thickness is 14.8～16.0mm fast growing wood base material after thickness after the charing heat treatment is thick hard broad-leaved timber skin panel of 2.0～3.2mm and charing heat treatment; Wood dermatoglyph reason and base material texture are in the same way; Resulting floor moisture equilibrium at dry side moisture content≤6.5%; The heat-resisting dimensional stability of width (contract with dry rate)≤1.4%, width moisture-proof dimensional stability (bulking factor)≤0.75%, heat conduction efficiency>=8 ℃/h.
As preferably, the used timber of said hard broad-leaved timber skin panel is sweetgum, oak, Manchurian ash, teak, elm, and described fast growing wood base material is masson pine, pinus sylvestris var. mongolica, poplar, China fir.They are during without heat treatment, poor stability, and the corrosion resistant weatherability is poor.
In sum, compared with prior art, the present invention has following beneficial effect:
1, adopt gas to do and kiln drying combined drying technology; Can prevent effectively that wooden skin and base material from going mouldy or blue stain to the influence of wood surface aesthetics; Reduce the grade of wooden skin or base material, this is that a kind of very energy-conserving and environment-protective are suitable for hard leaf wood skin and the dry method of fast growing wood base material;
2, adopt the stack drying mode to carry out drying and charing heat treatment; Promptly can prevent the generation of seasoning defect drying defect and heat treating fault; Improve volume recovery and output, and can accelerate rate of drying and charing thermal treatment rate, can guarantee the quality of dry mass and heat treatment gained wood skin and base material again;
3, the charing heat treatment step of present technique scheme is specially for used hard broad-leaved timber skin of stable dual-layer of the present invention ground heating solid wooden floor board and fast growing wood base material development and Design, and it is simple to have production technology; With short production cycle, production efficiency is high, and production cost is low; Volume recovery is high; Make the good planeness of the base material of the wooden skin that obtains to reach 100% volume recovery, can realize the high-efficiency energy-saving carbon heat-transmission treatment process of serialization, large-scale industrialized production, the breakthrough of qualitative difference and matter is arranged with prior art; As by charing heat-treated wood of the present invention, can make and handle that the timber appearance table that obtains splits, implosion, end check and flexural deformation defective;
4, handle and obtain wooden skin and the base material equilibrium moisture content is low, and the mutual good evenness of the equilibrium moisture content of the two, the solid wooden floor board dimensional stability that gummed is fixedly obtained is good; The corrosion resistant weatherability is strong; Long service life has the soft unique result of use in the hard end of table, can directly apply to ground heating environment.
The specific embodiment
Embodiment 1
A. wooden skin and base material making step: hard broadleaf oak saw is processed the thick wooden skin of 2.2mm, fast growing wood masson pine saw is processed the thick base material of 17.5mm.
B. drying steps: it is one folded being superimposed 5 thick oak wood skins of 2.2mm, adopts pallet and the aluminium alloy parting bead of uniform specification, during stacking parting bead apart from the wooden skin end distance of oak in 5cm; Stiker spacing is at 20cm, and parting bead is neatly upwards in alignment at hard Nogata, setting-out clod on the good oak wood of stacking skin heap; Place the advanced promoting the circulation of qi of the dried canopy of gas do dry promptly (mean temperature is 25.3 ℃ round the clock, mean wind speed 2.1m/s round the clock, the time September in season); When making oak wood skin moisture content be reduced to 25% left and right sides; Move on to and carry out the kiln drying drying in the dry kiln, make moisture content≤15% of wooden skin, the gas that is adopted is done with kiln drying combined drying technology and is seen table 1.By same drying steps, being superimposed 2 thick masson pine base materials of 17.5mm is a folded integral body, adopts the pallet and the aluminium alloy parting bead of uniform specification; In 5cm, stiker spacing is at 10～20cm apart from masson pine base material end face for parting bead during stacking, and parting bead is neatly upwards in alignment at hard Nogata; Setting-out clod on the good masson pine base material heap of stacking; Place the advanced promoting the circulation of qi of the dried canopy of gas do dry promptly (mean temperature is 25.3 ℃ round the clock, mean wind speed 2.1m/s round the clock, the time September in season); When making oak wood skin moisture content be reduced to 25% left and right sides; Move on to and carry out the kiln drying drying in the dry kiln, make the moisture content 8% of base material, the gas that is adopted is done with kiln drying combined drying technology and is seen table 2.
Table 1 oak wood skin gas is done and kiln drying combined drying technology
Table 2 masson pine base material gas is done and kiln drying combined drying technology
C. charing heat treatment step: be directly to send dry good oak wood skin of dry kiln and masson pine base material together in the charing heat treatment kiln with fork truck; Close the heat treatment wicket; Open heating and humidification valve simultaneously; The Fast Heating humidification directly is warmed up to 210 ℃ wooden skin and base material is carried out charing heat treatment 4h, closes after the end when adding thermal recovery jet atomization water method and letting in the charing heat treatment kiln fast cooling to 120～125 ℃, finishes atomization water and stops humidification.Attention will keep dry-bulb temperature greater than 20～30 ℃ of wet-bulb temperature during less than 100 ℃ when wet-bulb temperature in Fast Heating humidification temperature-rise period, until wet-bulb temperature >=100 ℃, and keeps being full of steam in the kiln.
D. moisture content is adjusted back step: be after finishing atomization water and stop humidification in the charing heat treatment kiln; When being cooled to 100 ± 5 ℃ naturally; Opening humidification again adopts 100 ℃ of steams that wooden skin and base material are carried out gas steaming moisture content readjustment 4h; Make wooden skin and base material moisture content after the heat treatment adjust back 7%, finish gas and steam, get final product kiln discharge when cooling to interior 40～60 ℃ of kiln naturally.
E. glue together fixing step: after all adopting 140 order abrasive bands to carry out sanding to oak wood skin and masson pine base material; Carry out applying glue and paste gummed to wooden skin sanding face fixing to base material sanding face along base material grain direction; Health 7 days is again after machining, mortise fluting, UV application and the stable dual-layer ground heating solid wooden floor board that obtains.
The stable dual-layer ground heating solid wooden floor board of gained; It comprises that thickness is 16.0mm fast growing wood masson pine base material after thickness after the charing heat treatment is thick hard broadleaf oak wood skin panel of 2.0mm and charing heat treatment; Oak wood dermatoglyph reason and masson pine base material texture in the same way, resulting floor moisture equilibrium at dry side moisture content 6.1%, the heat-resisting dimensional stability of width (contract with dry rate) 1.02%; Width moisture-proof dimensional stability (bulking factor) 0.72%, 8.2 ℃/h of heat conduction efficiency.
Embodiment 2
A. wooden skin and base material making step: hard broadleaf Manchurian ash saw is processed the thick wooden skin of 3.6mm, fast growing wood pinus sylvestris var. mongolica saw is processed the thick base material of 12.8mm.
B. drying steps: it is one folded being superimposed 2 thick Manchurian ash wood skins of 3.6mm; Adopt the pallet and the aluminium alloy parting bead of uniform specification, in 5cm, stiker spacing is at 20cm apart from Manchurian ash wood skin end distance for parting bead during stacking; Parting bead is neatly upwards in alignment at hard Nogata; Setting-out clod on the good Manchurian ash wood skin heap of stacking places dry kiln dry, makes moisture content≤15% of wooden skin.By same drying steps, being superimposed 3 thick pinus sylvestris var. mongolica base materials of 12.8mm is a folded integral body, adopts the pallet and the aluminium alloy parting bead of uniform specification; During stacking parting bead apart from pinus sylvestris var. mongolica base material end face in 5cm; Stiker spacing is at 10～20cm, and parting bead is neatly upwards in alignment at hard Nogata, setting-out clod on the good pinus sylvestris var. mongolica base material heap of stacking; Place dry kiln to carry out drying, make the moisture content 6% of base material.
C. charing heat treatment step: be directly to send dry good Manchurian ash wood skin and the pinus sylvestris var. mongolica base material of dry kiln together in the charing heat treatment kiln with fork truck; Close the heat treatment wicket; Open heating and humidification valve simultaneously; The Fast Heating humidification directly is warmed up to 180 ℃ Manchurian ash wood skin and pinus sylvestris var. mongolica base material is carried out charing heat treatment 2h, closes after the end when adding thermal recovery jet atomization water method and letting in the charing heat treatment kiln fast cooling to 120～125 ℃, finishes atomization water and stops humidification.Attention will keep dry-bulb temperature greater than 20～30 ℃ of wet-bulb temperature during less than 100 ℃ when wet-bulb temperature in Fast Heating humidification temperature-rise period, until wet-bulb temperature >=100 ℃, and keeps being full of steam in the kiln.
D. moisture content is adjusted back step: be in the charing heat treatment kiln, to finish atomization water and stop humidification; When being cooled to 100 ± 5 ℃ naturally; Opening humidification again adopts 100 ℃ of steams that Manchurian ash wood skin and pinus sylvestris var. mongolica base material are carried out gas steaming moisture content readjustment 10h; Make wooden skin and base material moisture content after the heat treatment adjust back 11%, finish gas and steam, get final product kiln discharge when cooling to interior 40～60 ℃ of kiln naturally.
E. glue together fixing step: after all adopting 160 order abrasive bands to carry out sanding to Manchurian ash wood skin and pinus sylvestris var. mongolica base material; Carry out applying glue and paste gummed to wooden skin sanding face fixing to base material sanding face along base material grain direction; Health 2 days is again after machining, mortise fluting, UV application and the stable dual-layer ground heating solid wooden floor board that obtains.
The stable dual-layer ground heating solid wooden floor board of gained; It comprises that thickness is 14.8mm fast growing wood pinus sylvestris var. mongolica base material after thickness after the charing heat treatment is thick hard broadleaf Manchurian ash wood skin panel of 3.2mm and charing heat treatment; Wood dermatoglyph reason and base material texture in the same way, resulting floor moisture equilibrium at dry side moisture content 6.45%, the heat-resisting dimensional stability of width (contract with dry rate) 1.4%; Width moisture-proof dimensional stability (bulking factor) 0.75%, 8 ℃/h of heat conduction efficiency.
Embodiment 3
A. wooden skin and base material making step: hard broadleaf maple saw is processed the thick wooden skin of 2.8mm, fast growing wood poplar saw is processed the thick base material of 13.4mm.
B. drying steps: it is one folded being superimposed 4 thick maple wood skins of 2.8mm; Adopt the pallet and the aluminium alloy parting bead of uniform specification, in 5cm, stiker spacing is at 20cm apart from maple wood skin end distance for parting bead during stacking; Parting bead is neatly upwards in alignment at hard Nogata; Setting-out clod on the good maple wood of stacking skin heap places dry kiln dry, makes moisture content≤15% of wooden skin.By same drying steps, being superimposed 3 thick poplar base materials of 13.4mm is a folded integral body, adopts the pallet and the aluminium alloy parting bead of uniform specification; During stacking parting bead apart from poplar base material end face in 5cm; Stiker spacing is at 10～20cm, and parting bead is neatly upwards in alignment at hard Nogata, setting-out clod on the good poplar base material heap of stacking; Place dry kiln to carry out drying, make the moisture content 7% of base material.
C. charing heat treatment step: be directly to send dry good maple wood skin of dry kiln and poplar base material together in the charing heat treatment kiln with fork truck; Close the heat treatment wicket; Open heating and humidification valve simultaneously; The Fast Heating humidification directly is warmed up to 190 ℃ maple wood skin and poplar base material is carried out charing heat treatment 3h, closes after the end when adding thermal recovery jet atomization water method and letting in the charing heat treatment kiln fast cooling to 120～125 ℃, finishes atomization water and stops humidification.Attention will keep dry-bulb temperature greater than 20～30 ℃ of wet-bulb temperature during less than 100 ℃ when wet-bulb temperature in Fast Heating humidification temperature-rise period, until wet-bulb temperature >=100 ℃, and keeps being full of steam in the kiln.
D. moisture content readjustment step: be after finishing atomization water and stopping humidification, shift out the wooden skin of maple and poplar base material with fork truck when cooling in the kiln 40～60 ℃ naturally and place and carry out moisture content in the dry kiln and adjust back 8%.
E. glue together fixing step: after all adopting 180 order abrasive bands to carry out sanding to maple wood skin and poplar base material; Carry out applying glue and paste gummed to maple wood skin sanding face fixing to poplar base material sanding face along base material grain direction; Health 5 days is again after machining, mortise fluting, UV application and the stable dual-layer ground heating solid wooden floor board that obtains.
The stable dual-layer ground heating solid wooden floor board of gained; It comprises that thickness is 12.5mm fast growing wood poplar base material after thickness after the charing heat treatment is thick hard broadleaf maple wood skin panel of 2.5mm and charing heat treatment; Wood dermatoglyph reason and base material texture in the same way, resulting floor moisture equilibrium at dry side moisture content 6.12%, the heat-resisting dimensional stability of width (contract with dry rate) 1.21%; Width moisture-proof dimensional stability (bulking factor) 0.69%, 9.3 ℃/h of heat conduction efficiency.
Embodiment 4
A. wooden skin and base material making step: hard broadleaf elm saw is processed the thick wooden skin of 3.3mm, fast growing wood China fir saw is processed the thick base material of 14.0mm.
B. drying steps: it is one folded being superimposed 3 thick elm wood skins of 3.3mm; Adopt the pallet and the aluminium alloy parting bead of uniform specification, in 5cm, stiker spacing is at 20cm apart from elm wood skin end distance for parting bead during stacking; Parting bead is neatly upwards in alignment at hard Nogata; Setting-out clod on the good elm wood of stacking skin heap places dry kiln dry, makes moisture content≤15% of wooden skin.By same drying steps, being superimposed 2 thick China fir base materials of 14.0mm is a folded integral body, adopts the pallet and the aluminium alloy parting bead of uniform specification; During stacking parting bead apart from China fir base material end face in 5cm; Stiker spacing is at 10～20cm, and parting bead is neatly upwards in alignment at hard Nogata, setting-out clod on the good China fir base material heap of stacking; Place dry kiln to carry out drying, make the moisture content 7% of base material.
C. charing heat treatment step: be directly to send dry good elm wood skin of dry kiln and China fir base material together in the charing heat treatment kiln with fork truck; Close the heat treatment wicket; Open heating and humidification valve simultaneously; The Fast Heating humidification directly is warmed up to 195 ℃ elm wood skin and China fir base material is carried out charing heat treatment 3h, closes after the end when adding thermal recovery jet atomization water method and letting in the charing heat treatment kiln fast cooling to 120～125 ℃, finishes atomization water and stops humidification.Attention will keep dry-bulb temperature greater than 20～30 ℃ of wet-bulb temperature during less than 100 ℃ when wet-bulb temperature in Fast Heating humidification temperature-rise period, until wet-bulb temperature >=100 ℃, and keeps being full of steam in the kiln.
D. moisture content readjustment step: be after finishing atomization water and stopping humidification, shift out the wooden skin of elm and China fir base material with fork truck when cooling in the kiln 40～60 ℃ naturally and place and carry out moisture content in the dry kiln and adjust back 9%.
E. glue together fixing step: after all adopting 180 order abrasive bands to carry out sanding to elm wood skin and China fir base material; Carry out applying glue and paste gummed to elm wood skin sanding face fixing to China fir base material sanding face along base material grain direction; Health 4 days is again after machining, mortise fluting, UV application and the stable dual-layer ground heating solid wooden floor board that obtains.
The stable dual-layer ground heating solid wooden floor board of gained; It comprises that thickness is 13.0mm fast growing wood China fir base material after thickness after the charing heat treatment is thick hard broadleaf elm wood skin panel of 3.0mm and charing heat treatment; Wood dermatoglyph reason and base material texture in the same way, resulting floor moisture equilibrium at dry side moisture content 6.04%, the heat-resisting dimensional stability of width (contract with dry rate) 1.14%; Width moisture-proof dimensional stability (bulking factor) 0.69%, 8.7 ℃/h of heat conduction efficiency.
Claims (10)
1. stable dual-layer ground heating solid wooden floor board manufacturing approach, it is characterized in that: it may further comprise the steps:
(1) wooden skin and base material making step: hard broad-leaved wood saw is processed the thick wooden skin of 2.2～3.6mm, the fast growing wood saw is processed the thick base material of 12.8～17.5mm;
(2) drying steps: hard broad-leaved timber skin is carried out drying make its moisture content≤15%, fast growing wood base material drying is made its moisture content≤8%;
(3) charing heat treatment step: the Fast Heating humidification directly is warmed up to 180～210 ℃ condition wooden skin and base material is carried out charing heat treatment in heat treatment kiln;
(4) moisture content readjustment step: after carrying out the moisture content readjustment in the charing heat treatment kiln or going out the charing heat treatment kiln, in dry kiln, carry out the moisture content readjustment, moisture content is 7～11%;
(5) gummed fixing step: wooden skin and base material all through after the sanding, are carried out applying glue and glue together wooden skin stickup along base material grain direction fixing to base material.
2. a kind of stable dual-layer ground heating solid wooden floor board manufacturing approach according to claim 1 is characterized in that: said drying steps: be that to be superimposed 2 ~ 5 veneer skins be one folded whole, adopt the pallet and the aluminium alloy parting bead of uniform specification; During stacking parting bead apart from wooden skin end face in 5cm; Stiker spacing is at 10～20cm, and parting bead is neatly upwards in alignment at hard Nogata, setting-out clod on the good wooden skin heap of stacking; It is dry to place the advanced promoting the circulation of qi of the dried canopy of gas to do; After move on to and carry out the kiln drying drying in the dry kiln, or directly place dry kiln to carry out conventional drying, make moisture content≤15% of wooden skin.
3. a kind of stable dual-layer ground heating solid wooden floor board manufacturing approach according to claim 1 is characterized in that: said drying steps: be that to be superimposed 2 ~ 3 plate substrates be one folded whole, adopt the pallet and the aluminium alloy parting bead of uniform specification; During stacking parting bead apart from the base material end face in 5cm; Stiker spacing is at 10～20cm, and parting bead is neatly upwards in alignment at hard Nogata, setting-out clod on the good base material heap of stacking; It is dry to place the advanced promoting the circulation of qi of the dried canopy of gas to do; After move on to and carry out the kiln drying drying in the dry kiln, or directly place dry kiln to carry out conventional drying, make moisture content≤8% of base material.
4. a kind of stable dual-layer ground heating solid wooden floor board manufacturing approach according to claim 1; It is characterized in that: said charing heat treatment step: be directly to send dry good wooden skin and the base material of dry kiln together in the charing heat treatment kiln with fork truck; Close the heat treatment wicket; Open heating and humidification valve simultaneously; The Fast Heating humidification directly is warmed up to 180～210 ℃ wooden skin and base material is carried out charing heat treatment 2～4h, closes after the end when adding thermal recovery jet atomization water method and letting in the charing heat treatment kiln fast cooling to 120 ~ 125 ℃, finishes atomization water and stops humidification.
5. according to claim 1 and 4 described a kind of stable dual-layer ground heating solid wooden floor board manufacturing approaches; It is characterized in that: said charing heat treatment step: be to keep dry-bulb temperature greater than 20～30 ℃ of wet-bulb temperature when wet-bulb temperature is less than 100 ℃ in Fast Heating humidification temperature-rise period; Until wet-bulb temperature >=100 ℃, keep being full of steam in the kiln.
6. a kind of stable dual-layer ground heating solid wooden floor board manufacturing approach according to claim 1; It is characterized in that: said moisture content readjustment step: be after finishing atomization water and stop humidification in the charing heat treatment kiln; When being cooled to 100 ± 5 ℃ naturally, opening humidification again and adopt 100 ℃ of steams that wooden skin and base material are carried out gas to steam moisture content and adjust back 4～10h, make wooden skin and base material moisture content after the heat treatment adjust back 7～11%; Finish gas and steam, get final product kiln discharge when cooling to interior 40～60 ℃ of kiln naturally.
7. a kind of stable dual-layer ground heating solid wooden floor board manufacturing approach according to claim 1; It is characterized in that: said moisture content readjustment step: be after finishing atomization water and stopping humidification, shift out wooden skin and base material with fork truck when cooling to interior 40～60 ℃ of kiln naturally and place and carry out moisture content in the dry kiln and adjust back 7～11%.
8. a kind of stable dual-layer ground heating solid wooden floor board manufacturing approach according to claim 1; It is characterized in that: said gummed fixing step: after all adopting the above abrasive band of 140 orders to carry out sanding to wooden skin and base material; Carry out applying glue and paste gummed to wooden skin sanding face fixing to base material sanding face along base material grain direction; Health 2 ~ 7 days is again after machining, mortise fluting, UV application and the stable dual-layer ground heating solid wooden floor board that obtains.
9. according to the stable dual-layer ground heating solid wooden floor board of the described a kind of stable dual-layer of claim 1～8 ground heating solid wooden floor board manufacturing approach gained; It is characterized in that: it comprises that thickness is 14.8～16.0mm fast growing wood base material after thickness after the charing heat treatment is hard broad-leaved timber skin panel and the charing heat treatment of 2.0～3.2mm; Wood dermatoglyph reason and base material texture are in the same way; Resulting floor moisture equilibrium at dry side moisture content≤6.5%; The heat-resisting dimensional stability of width (contract with dry rate)≤1.4%, width moisture-proof dimensional stability (bulking factor)≤0.75%, heat conduction efficiency>=8 ℃/h.
10. a kind of stable dual-layer ground heating solid wooden floor board according to claim 9; It is characterized in that: the used timber of said hard broad-leaved timber skin panel is oak, Manchurian ash, teak, elm, and described fast growing wood base material is masson pine, pinus sylvestris var. mongolica, poplar, China fir.
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