CN103072172A - Boxboard based on high-density oriented strand board and processing method thereof - Google Patents
Boxboard based on high-density oriented strand board and processing method thereof Download PDFInfo
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- CN103072172A CN103072172A CN2012105397085A CN201210539708A CN103072172A CN 103072172 A CN103072172 A CN 103072172A CN 2012105397085 A CN2012105397085 A CN 2012105397085A CN 201210539708 A CN201210539708 A CN 201210539708A CN 103072172 A CN103072172 A CN 103072172A
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Abstract
The invention discloses a high-density oriented strand board with the density more than or equal to 0.8g/cm<3>. The high-density oriented strand board is obtained by stacking and hot-pressing; the temperature for stacking and hot-pressing is higher than or equal to 120 DEG C but lower than or equal to 160 DEG C; the ratio of the time for stacking and hot-pressing to the thickness of the high-density oriented strand board is within the scope of 80-120; and the ratio is counted by s/mm. The high-density oriented strand board disclosed by the invention can select wider pressure adjusting scope; the limitation to the upper pressure limit in continuous hot-pressing is avoided; the quantity of water from adhesives and wood shavings converted into gas is reduced; the detention of the gas between the wood shavings is reduced; the generation of the board explosion phenomenon is avoided; and meanwhile, the hot-pressing time is prolonged, the density of the processed oriented strand board is increased and the mechanical property is increased. The invention further discloses a processing method for the high-density oriented strand board, a boxboard based on the high-density oriented strand board and a processing method thereof.
Description
Technical field
The present invention relates to the wood processing technique field, particularly relate to a kind of high density oriented wood chipboard and preparation method thereof.In addition, the invention still further relates to a kind of boxboard based on the high density oriented wood chipboard and preparation method thereof.
Background technology
In recent years, fast development along with building decoration, upholstery, packing case, cargo pallet and storage box, container industry, the sharp increase of timber demand amount, the breach of wood supply is more and more outstanding, wood-based panel industry is exactly to have obtained in this case significant progress, the use of wood-based plate is conducive to alleviate the timber imbalance between supply and demand, is the important channel of to save timber resource.
Wood-based plate refers to take timber or other non-wood plants as raw material, be processed into the different group element materials such as veneer, wood shavings or fiber, through applying (or not adding) adhesive and other additives, reconfigure the sheet material of making, mainly comprise the three major types products such as glued board, wood shavings (particle) plate and fiberboard.Wherein, particieboard (appellations such as " solid wood granule plates " is arranged again) is the fragment that the raw material such as timber is cut into certain specification, through super-dry, mix with adhesive, curing agent, waterproofing agent, a kind of artificial board that at a certain temperature compacting forms, and oriented wood chipboard (OSB) is a kind of new particieboard, when wood shavings are mated formation moulding, the glue mixing particieboard is arranged by its machine direction stringer, thereby the particieboard that is pressed into, the shape need length-width ratio of this particieboard is larger, and the wood shavings of Thickness Ratio ordinary particle board are slightly thick, and its performance is similar to glued board, the normal glued board that replaces is done the structural wood use, as a kind of new structure plate, taking full advantage of small dimension wood, fast growing wood, there is significant advantage the aspects such as raising timber utilization rate.
Prior art discloses multiple oriented wood chipboard, publication number is that the Chinese patent of CN101332614A discloses a kind of burnishing surface wood oriented structure chipboard and its Manufacturing approach and use, as shown in Figure 1, this oriented structure chipboard comprises surface layer 1 ', sandwich layer 2 ' and bottom 3 ', the production procedure of this manufacture method divides leading portion, stage casing and back segment, the stage casing is sandwich layer 2 ', it is the production technology of wood oriented structure chipboard (OSB), be about to along grain direction processing growth 30mm-150mm, wide 5mm-30mm, the wood planing piece of thick 0.3mm-1.2mm, through super-dry, hot-forming behind five layers of applying glue and the crisscross orienting spreadings, and at the production line leading portion of getting the raw materials ready of OSB, increased Wooden slice, grind and fibre separation equipment, some wooden fineves are produced in manufacturing, enter applying glue by screening after the drying, then mat formation production line leading portion and the back segment at OSB respectively increases by a joint spreading machine, the surface layer before the moulding 1 ' and bottom 3 ' do not increase one deck fines at OSB, then process through hot pressing and plain plate, make smooth smooth particieboard.Oriented wood chipboard by this mode is produced because surface layer 1 ' and bottom 3 ' have increased one deck fines, therefore have smooth smooth surface, but its mechanical property is lower, and range of application has been subject to certain restriction.
In order to improve the mechanical property of oriented wood chipboard, the Chinese patent of publication number CN102198684A discloses a kind of oriented wood chipboard and preparation technology, this preparation technology comprises that (1) get the raw materials ready: select that glued board processing is remaining to be done/wet rotary cut venner leftover pieces, thickness is at 0.4 ~ 0.9mm; The moisture content of wet veneer is 30% ~ 50%, and the moisture content of dried veneer is 15% ~ 20%; (2) guillotine cutting: respectively wet veneer and dried veneer are carried out guillotine cutting, the Chang Du＜=170mm of the wood shavings of guillotine cutting with cutting machine; (3) fragmentation: crusher in crushing, control wood shavings Kuan Du＜=40mm, Chang Du＜=170mm; (4) carry: the wood shavings after will screening by conveyer belt are delivered to the wet feed storehouse; (5) drying: the wet wood shavings in the wet feed storehouse are carried out drying by drier, and the drying machine outlet temperature is 120 ~ 150 ℃, the moisture content 3 ~ 5% of dry rear wood shavings; (6) selection by winnowing: the dried wood shavings and other foreign material that thickness are surpassed 0.9mm separate; (7) screening: dried wood shavings are separated according to size, reject length and width less than the wood shavings of 3mm, as the top layer wood shavings, remaining wood shavings are as the sandwich layer wood shavings with the wood shavings of length 〉=40mm, width 〉=5mm; (8) glue compounding and applying: adhesive is sprayed at the surface of the wood shavings after the screening, and sandwich layer wood shavings moisture content is 8 ~ 12% after the applying glue, and top layer wood shavings moisture content is 10 ~ 15%; (9) mat formation: through spreading machine the wood shavings orienting spreading is pressed into slab in advance, the slab density of mating formation is 570 ~ 630kg/m3; (10) hot pressing: the control board briquette is at 175 ~ 200 ℃; Unit pressure 3.0 ~ 3.3MPa; Hot pressing time was according to every millimeter of production board thickness 13 ~ 18 seconds; (11) saw limit: slab cools off after hot pressing, saws the limit again and makes oriented wood chipboard.Oriented wood chipboard by said method production, by lengthening the mode of oriented shaving length, MOR and the elastic modelling quantity of oriented wood chipboard have been improved, make it have higher bearing capacity, the length that still lengthens wood shavings is subject to the impact of machining equipment chipper on the one hand, on the other hand, wood shavings are long also can to affect the quality of mating formation, make and mat formation inhomogeneously, and then affect the intensity of particieboard, be difficult to satisfy the requirement of container bottom board.
For this reason, a kind of used for bottom plate of container directional structure board is also disclosed in the prior art, directional structure board is by the timber peeling, flaking, dry, screening, applying glue, three layers and more than orienting spreading alternately in length and breadth, the wish spray is steamed, the moulding of high tonnage continuous hot-press, the balance internal stress forms, the directional structure board that is made into by the method has higher density, and has good mechanical property, can use as container floor separately, but, when carrying out the processing and fabricating of oriented wood chipboard by said method, on the one hand, continuous hot-press refers to the hot pressing constantly carried out in the process of motion at oriented wood chipboard, the upper limit of its pressure (being tonnage) will guarantee can not affect the motion of oriented wood chipboard, so pressure is difficult for excessive; On the other hand, oriented wood chipboard will be finished hot pressing in the process of motion, and this just is easy to cause the generation of plate bursting phenomenon, and the qualification rate of product processing is lower, has caused the larger wasting of resources.
Therefore, how on the basis that guarantees smoothly processing and product percent of pass, produce and have higher force and learn performance, can be applied to the oriented wood chipboard of container bottom board, just become the present technical issues that need to address of those skilled in the art.
Summary of the invention
The purpose of this invention is to provide a kind of high density oriented wood chipboard, this high density oriented wood chipboard is adding the restriction that can eliminate man-hour pressure, avoid the generation of plate bursting phenomenon, on the basis that guarantees smoothly processing and product percent of pass, produce and have higher force and learn performance, can be applied to the oriented wood chipboard of container bottom board.Another object of the present invention provides a kind of processing method of high density oriented wood chipboard, a kind of boxboard and processing method thereof based on the high density oriented wood chipboard.
For addressing the above problem, the invention provides a kind of high density oriented wood chipboard, its density is more than or equal to 0.8g/cm
3, the high density oriented wood chipboard obtains by laminating hot pressing, the temperature of laminating hot pressing more than or equal to 120 ℃ less than or equal to 160 ℃, the ratio range of the thickness of the time of laminating hot pressing and high density oriented wood chipboard is 80 ~ 120, ratio is in s/mm.
Preferably, the time of laminating hot pressing is 1000s ~ 2200s.
Preferably, the thickness of the wood shavings of high density oriented wood chipboard is 0.4mm ~ 0.8mm.
Preferably, the moisture content of the wood shavings of high density oriented wood chipboard is 4% ~ 8%.
Preferably, the air-dry density of the wood shavings of high density oriented wood chipboard is more than or equal to 0.5g/cm
3
Preferably, the wood shavings of high density oriented wood chipboard comprise air-dry density greater than the hard material wood shavings of 0.5g/cm3, and air-dry density is less than or equal to 0.5g/cm
3The softwood wood shavings.
Preferably, the high density oriented wood chipboard comprises hard material wood shavings mat formation layer and the softwood wood shavings layer of mating formation, and the hard material wood shavings wood shavings mass ratio that wood shavings and the softwood wood shavings of layer mat formation layer of mating formation is (10 ~ 25): (75 ~ 90).
Preferably, comprise the layer of mating formation, down mat formation layer and the centre layer of mating formation, on mat formation layer and the lower layer of mating formation be that the layer of vertically mating formation, centre are mated formation and layer comprise at least one layer of laterally mating formation.
Preferably, the Central Symmetry setting with the high density oriented wood chipboard of vertically mat formation layer and the layer of laterally mating formation, and the quantity of the layer of vertically mating formation is more than or equal to the quantity of the layer of laterally mating formation.
For addressing the above problem, the present invention also provides a kind of processing method of high density oriented wood chipboard, may further comprise the steps:
Wood shavings are mixed with adhesive, obtain the glue mixing wood shavings;
Utilize spreading head that the glue mixing wood shavings are mated formation, obtain slab;
Slab is cut and laminating hot pressing, obtains the high density oriented wood chipboard, the temperature of laminating hot pressing more than or equal to 120 ℃ less than or equal to 160 ℃, the ratio range of the thickness of the time of laminating hot pressing and high density oriented wood chipboard is 80 ~ 120, ratio is in s/mm.
Preferably, the time of laminating hot pressing is 1000s ~ 2200s.
Preferably, the thickness of wood shavings is 0.4mm ~ 0.8mm.
Preferably, the moisture content of wood shavings is 4% ~ 8%.
Preferably, the air-dry density of wood shavings is more than or equal to 0.5g/cm
3
Preferably, wood shavings comprise that air-dry density is less than 0.5g/cm
3The softwood wood shavings and air-dry density more than or equal to 0.5g/cm
3Hard material wood shavings.
Preferably, the high density oriented wood chipboard comprises hard material wood shavings mat formation layer and the softwood wood shavings layer of mating formation, and the hard material wood shavings wood shavings mass ratio that wood shavings and the softwood wood shavings of layer mat formation layer of mating formation is (10 ~ 25): (75 ~ 90).
Preferably, spreading head comprises front spreading head at leading section, at rear spreading head and the middle spreading head between front spreading head and rear spreading head of afterbody, front spreading head and rear spreading head are vertical spreading head, and middle spreading head comprises at least one horizontal spreading head.
Preferably, vertically spreading head and horizontal spreading head are symmetrical arranged with the center of spreading head, and the quantity of vertical spreading head is more than or equal to the quantity of horizontal spreading head.
For addressing the above problem, the present invention also provides a kind of boxboard based on the high density oriented wood chipboard, comprise that at least one is based on the boxboard unit of high density oriented wood chipboard, boxboard unit based on the high density oriented wood chipboard comprises panel, central layer and base plate, and central layer is the above-specified high density oriented wood chipboard.
Preferably, panel has identical structure with base plate.
Preferably, panel and base plate include at least vertical veneer of one deck and the horizontal veneer of one deck, and laterally veneer and central layer directly glue together.
For addressing the above problem, the present invention also provides the method for a kind of processing based on the boxboard of high density oriented wood chipboard, may further comprise the steps:
The high density oriented wood chipboard that processing is above;
Stack successively the another one in one, high density oriented wood chipboard and base plate and the panel in base plate and the panel;
Hot pressing obtains the boxboard based on the high density oriented wood chipboard.
The invention provides a kind of high density oriented wood chipboard, its density is more than or equal to 0.8g/cm
3, the high density oriented wood chipboard obtains by laminating hot pressing, the temperature of laminating hot pressing more than or equal to 120 ℃ less than or equal to 160 ℃, the ratio range of the thickness of the time of laminating hot pressing and high density oriented wood chipboard is 80 ~ 120, ratio is in s/mm.Specifically in the man-hour that adds of carrying out the high density oriented wood chipboard, at first wood shavings are mixed with adhesive, obtain the glue mixing wood shavings that the surface speckles with adhesive, again the glue mixing wood shavings are mated formation by spreading head, then with slab cutting and laminating hot pressing, being about to slab is positioned on the laminating hot pressing machine, control laminating hot pressing temperature more than or equal to 120 ℃ less than or equal to 160 ℃, the ratio range of the thickness of the time of laminating hot pressing and high density oriented wood chipboard is 80 ~ 120, finish the making of high density oriented wood chipboard, pressure can be chosen in pressure commonly used in the oriented wood chipboard processing or slightly larger than above-mentioned pressure.Like this, not only increased the adjusting range of hot pressing pressure by the mode of laminating hot pressing, avoided in the continuous hot-press restriction to upper pressure limit, and the water transform that has greatly reduced in adhesive and the wood shavings by the control to index is gas, reduced the gas that transforms and the gas that originally is present between the wood shavings to be trapped between the wood shavings, and then avoided the generation of plate bursting phenomenon, simultaneously, the setting of hot pressing time has improved the density of the oriented wood chipboard of processing, has reached 0.8g/cm
3More than, the mechanical property of oriented wood chipboard has obtained larger raising.Experimental result shows, the rift grain MOR of the oriented wood chipboard that method provided by the invention obtains more than or equal to 50MPa, band MOR more than or equal to 30MPa; Its modulus of elasticity parellel to grain more than or equal to 5000MPa, tangential elastic module more than or equal to 3000MPa; Its internal bond strength is more than or equal to 0.45MPa; Can bear the dynamic load more than or equal to 2.0T.
The processing method of high density oriented wood chipboard provided by the present invention, similar based on the beneficial effect of the processing method of the beneficial effect of boxboard of high density oriented wood chipboard and preparation method thereof and high density oriented wood chipboard does not repeat them here.
Description of drawings
Fig. 1 is the structural scheme of mechanism of a kind of oriented wood chipboard in the prior art;
The schematic diagram of the arrangement mode of the wood shavings of the high density oriented wood chipboard that Fig. 2 provides for the embodiment of the invention;
The structural representation based on the boxboard of high density oriented wood chipboard that Fig. 3 provides for the embodiment of the invention.
The specific embodiment
Core of the present invention provides a kind of high density oriented wood chipboard, this high density oriented wood chipboard is adding the restriction that can eliminate man-hour pressure, avoid the generation of plate bursting phenomenon, on the basis that guarantees smoothly processing and product percent of pass, produce and have higher force and learn performance, can be applied to the oriented wood chipboard of container bottom board.Another core of the present invention provides a kind of processing method of high density oriented wood chipboard, a kind of boxboard and processing method thereof based on the high density oriented wood chipboard.
In order to make those skilled in the art person understand better the present invention program, the present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Specifically please refer to Fig. 2, the schematic diagram of the arrangement mode of the wood shavings of the high density oriented wood chipboard that Fig. 2 provides for the embodiment of the invention.
As shown in FIG., high density oriented wood chipboard provided by the present invention comprises that specifically the density of this high density oriented wood chipboard is more than or equal to 0.8g/cm according to the staggered wood shavings 21 of the mutual directed lamination of its grain direction
3The high density oriented wood chipboard obtains by laminating hot pressing, the temperature of laminating hot pressing more than or equal to 120 ℃ less than or equal to 160 ℃, the ratio range of the thickness of the time of laminating hot pressing and high density oriented wood chipboard is 80 ~ 120, wherein the unit of time is s, and the unit of thickness is mm.Carry out the compacting of high density oriented wood chipboard by the mode of laminating hot pressing, can exert pressure in its vertical direction, thereby increased the adjusting range of the pressure of hot pressing, avoided in the continuous hot-press restriction to upper pressure limit, obtain larger hot pressing pressure with the density of raising oriented wood chipboard, thereby improve its mechanical property.Temperature when controlling laminating hot pressing simultaneously more than or equal to 120 ℃ less than or equal to 160 ℃, the ratio range of the thickness of laminating hot pressing time and high density oriented wood chipboard is 80 ~ 120, the water transform that has greatly reduced in adhesive and the wood shavings is gas, the gas that has reduced the gas of conversion and originally be present between the wood shavings is trapped between the wood shavings, and then avoided the generation of plate bursting phenomenon, and simultaneously, the setting of hot pressing time, improve the density of the oriented wood chipboard of processing, reached 0.8g/cm
3More than, mechanical property has obtained larger raising.Experimental result shows, the rift grain MOR of the oriented wood chipboard that method provided by the invention obtains more than or equal to 50MPa, band MOR more than or equal to 30MPa; Its modulus of elasticity parellel to grain more than or equal to 5000MPa, tangential elastic module more than or equal to 3000MPa; Its internal bond strength is more than or equal to 0.45MPa; Can bear the dynamic load more than or equal to 2.0T.
Certainly, be subjected to the impact of concrete high density oriented shaving plate thickness, the scope of the time of laminating hot pressing can be 1000s ~ 2200s.
In order further to improve the qualification rate of product, the thickness that can make the wood shavings of high density oriented wood chipboard is 0.4mm ~ 0.8mm.
Studies show that, the size of wood shavings has certain impact for the quality of oriented wood chipboard, the thickness of wood shavings particularly, on the one hand, carry out in the mixed process at wood shavings and adhesive, adhesive can be penetrated into the inside of wood shavings, improve the intensity of wood shavings, but the penetrating power of adhesive is limited, if wood shavings are blocked up, then have to have the wood shavings that exist with pure wood shavings form in a large number, so that it is lower to machine the density of oriented wood chipboard, thereby strength decreased, and wood shavings are crossed the difficulty that Bao Youhui causes wood shavings processing; On the other hand, in the situation of identical oriented shaving plate thickness, the thickness of wood shavings is thicker, the wood shavings number of plies that needs is fewer, and the quantity of the adhesive between adjacent wood shavings is also just fewer, and this has just further reduced the amount of adhesive, reduced the bonding strength of wood shavings, reduce density and the intensity of oriented wood chipboard, for this reason, the thickness of wood shavings has been chosen to be 0.4mm ~ 0.8mm.
Simultaneously, the moisture content of wood shavings also has certain impact to the processing success of high density oriented wood chipboard, and the moisture in the timber can be vaporized in the situation of being heated, and then has increased the amount of gas, has strengthened the risk of plate bursting; And if the hypohydration in the timber can make again the rigidity of wood shavings and tensile property descend, cause the difficulty of hot pressing, affect simultaneously intensity and the mechanical property of oriented wood chipboard, for this reason, the moisture content of the wood shavings of selected high density oriented wood chipboard is 4% ~ 8%.
The use of adhesive has improved the mechanical strength of timber, still, still has the wood shavings do not infiltrate through adhesive,, the air-dry density of the wood shavings of high density oriented wood chipboard is chosen to be more than or equal to 0.5g/cm for this reason
3Thereby, improve further sheet material plasticity and the mechanical loading of high density oriented wood chipboard.
Certainly, on the basis of the requirement of the sheet material plasticity that guarantees the high density oriented wood chipboard and mechanical loading, make it have higher MOR and elastic modelling quantity, reduce simultaneously cost, can make wood shavings comprise that namely air-dry density is less than 0.5g/cm
3The softwood wood shavings, comprise that again air-dry density is more than or equal to 0.5g/cm
3Hard material wood shavings.The mass ratio of two kinds of wood shavings be specifically as follows hard material wood shavings mat formation the layer wood shavings: the softwood wood shavings mat formation the layer wood shavings (10 ~ 25): (75 ~ 90).
In the another kind of specific embodiment, high density oriented wood chipboard disclosed in this invention can comprise the layer of mating formation, down mat formation layer and the centre layer of mating formation, mat formation wherein layer and the lower layer of mating formation is that the layer of vertically mating formation, centre are mated formation and layer comprises at least one layer of laterally mating formation.Like this, be easier to improve the density of high density oriented wood chipboard, obtain higher intensity, its boxboard that further adds the work container can be born load-carrying greater than 7.26T.
Certainly, vertically mat formation the layer and laterally mat formation the layer the Central Symmetry setting with the high density oriented wood chipboard, and the quantity of the layer of vertically mating formation is more than or equal to the quantity of the layer of laterally mating formation, thereby guaranteed the stressed uniformity when the high density oriented wood chipboard uses as container bottom board, guaranteed that simultaneously the parameters such as elastic modelling quantity of the high density oriented wood chipboard that machines meet the standard of container bottom board.
The invention provides a kind of processing method of high density oriented wood chipboard, may further comprise the steps:
Wood shavings are mixed with adhesive, obtain the glue mixing wood shavings; The present invention does not have special restriction, all those skilled in the art to think to can be used in the wood shavings of making oriented wood chipboard to the source of described wood shavings, material, size etc. can.
Studies show that the size of wood shavings has certain impact for the quality of oriented wood chipboard, can the impact quality of mating formation if the length of wood shavings is long, so that wood shavings are mated formation is inhomogeneous, the intensity of the oriented wood chipboard that impact obtains; If the too short endoplasm pulling force that can affect the oriented wood chipboard that obtains of the length of wood shavings, the intensity of reduction product; The width of wood shavings is wide or cross narrow meeting and cause applying glue inhomogeneous, causes easily glue-line to be peeled off, so that bonding strength descends; The impact of the thickness of wood shavings then is larger, on the one hand, carry out in the mixed process at wood shavings and adhesive, adhesive can be penetrated into the inside of wood shavings, improves the intensity of wood shavings, but the penetrating power of adhesive is limited, if wood shavings are blocked up, then have to have the wood shavings that exist with pure wood shavings form in a large number, so that it is lower to machine the density of oriented wood chipboard, thereby strength decreased, and wood shavings are crossed the difficulty that Bao Youhui causes wood shavings processing; On the other hand, in the situation of identical oriented shaving plate thickness, the thickness of wood shavings is thicker, the wood shavings number of plies that needs is fewer, and the quantity of the adhesive between adjacent wood shavings is also just fewer, and this has just further reduced the amount of adhesive, reduced the bonding strength of wood shavings, reduce density and the intensity of oriented wood chipboard, for this reason, the thickness of wood shavings has been chosen to be 0.4mm ~ 0.8mm.
The present invention does not have clear and definite restriction for length and the width of wood shavings, the Flake geometry that those skilled in the art are familiar with all is fine, but, because the length of wood shavings and width also have certain impact to the quality of oriented wood chipboard, for this reason, can adopt length is 100mm ~ 130mm, and width is 10mm ~ 30mm wood shavings.
Understand easily, all preorder processing to wood shavings all are in order to form the high density oriented wood chipboard, and the key that improves the production qualification rate of high density oriented wood chipboard a bit is to reduce the probability that the plate bursting phenomenon occurs; Yet, well-known, contain moisture in the timber, water can be vaporized in the situation of being heated, and then has increased the amount of gas, has strengthened the risk of plate bursting; And the hypohydration in the timber, rigidity and the tensile property of wood shavings are descended, cause the difficulty of hot pressing, affect simultaneously intensity and the mechanical property of oriented wood chipboard, therefore, for success (qualified) rate that guarantees to process, need to control the moisture content in the wood shavings, the moisture content that specifically can make wood shavings is 4% ~ 8%.
The method that the present invention controls the moisture content of wood shavings does not have special restriction, and all modes well-known to those skilled in the art can.
According to aforementioned content as can be known, the mechanics weakness of high density oriented wood chipboard is not penetrate into the wood shavings of adhesive, therefore, and in the present invention, in order further to improve sheet material plasticity and the mechanical loading of high density oriented wood chipboard, preferred air-dry density is more than or equal to 0.5g/cm
3Timber, namely the air-dry density of wood shavings need to be more than or equal to 0.5g/cm
3, certainly, on the basis of the requirement of the sheet material plasticity that guarantees the high density oriented wood chipboard and mechanical loading, make it have higher MOR and elastic modelling quantity, can also select to comprise simultaneously air-dry density less than 0.5g/cm
3Timber (such as fast growing woods such as pine, poplars) and air-dry density 〉=0.5g/cm
3Timber (such as beech, You Jiali, Marasse, clone or Eucalyptus etc.), the mass ratio of softwood wood shavings and hard material wood shavings can be (10 ~ 25): (75 ~ 90).
The present invention does not have special restriction to the preparation method of described wood shavings, adopts the technical scheme of wood shavings preparation well known to those skilled in the art to get final product.It is CARMANAH 34/114BLOCK DISC FLAKER(FORMERLY CAE that the present invention preferably adopts model) shaving machine of SOB/SERIAL NO.150-83 produces the wood shavings of above-mentioned size, in the process of producing above-mentioned wood shavings, the length of described charging juggle is preferably 800mm, and diameter is preferably 100mm ~ 600mm.
After obtaining to carry out the wood shavings of next step processing, again wood shavings are mixed with adhesive, obtain the glue mixing wood shavings.The present invention does not have special restriction to the mass ratio of described wood shavings and adhesive, adopts the mass ratio of wood shavings well known to those skilled in the art and adhesive to get final product.
The present invention studies show that, in the manufacturing process of oriented wood chipboard, causes bubbling if resin added is crossed conference, it is not firm that resin added is crossed small intensity, even can produce glue-line and peel off, and be easy to moisture absorption, thickness swelling rate is larger, so that product is out of shape easily, mechanical performance index is defective.Therefore, in the present invention, the mass ratio of described wood shavings and adhesive can be 100:(10 ~ 25).
In specific operation process, fully contact with wood shavings in order to make adhesive, can utilize air pressure to atomize adhesive, the adhesive of atomizing is fallen on the wood shavings that constantly are stirred.The present invention does not have special restriction to described Choosing of adhesive, adopts adhesive well known to those skilled in the art to get final product, such as commercially available phenolic resins (PF) adhesive or urea-formaldehyde resin adhesive (UF) etc.; For wood shavings can better be contacted with adhesive, the present invention preferably mixes described adhesive with water, the Process of Applying Glue that the glue that obtains is used for wood shavings, the present invention does not have special restriction to the mass ratio of described adhesive and water, adopt that the mass ratio of adhesive and water gets final product in the glue well known to those skilled in the art, in the present invention, the mass ratio of described adhesive and water can be (39～48): (61～52); The present invention has good combination property for the oriented wood chipboard that makes preparation, preferably in adhesive, add curing agent, waterproofing agent, fire retardant, anticorrisive agent etc., then the mixture that obtains is mixed with wood shavings, obtain the glue mixing wood shavings, the present invention does not have special restriction to kind and the consumption of described curing agent, waterproofing agent, fire retardant, anticorrisive agent, adopts curing agent well known to those skilled in the art, waterproofing agent, fire retardant, anticorrisive agent to get final product.The present invention adopts the consumption of the binding agent of above-mentioned mass ratio, makes the oriented wood chipboard that obtains can not reduce its intensity because of imbibition under the prerequisite with stronger bonding strength.
After obtaining the glue mixing wood shavings, utilize spreading head to mat formation the glue mixing wood shavings again, obtain slab.In the pavement process, the present invention does not have special restriction to the number of plies and the concrete set-up mode of mating formation, and can select mode well known to those skilled in the art
Particularly, use as container bottom board for guaranteeing that the high density oriented wood chipboard of processing is more suitable, spreading head can comprise front spreading head at leading section, at rear spreading head and the middle spreading head between front spreading head and rear spreading head of afterbody, and front spreading head and rear spreading head are vertical spreading head, middle spreading head comprises at least one horizontal spreading head, the slab of finishing of mating formation so just comprises the layer of vertically mating formation that is positioned at upper surface and lower surface, and is positioned at least one layer of laterally mating formation in the middle of the two.Thereby make oriented wood chipboard provided by the invention have higher density, and have higher intensity, can bear load-carrying greater than 7.26T used as the boxboard of container, be beneficial to its application.
For mechanical property and the bonding strength that further improves the high density oriented wood chipboard, vertical spreading head and horizontal spreading head are symmetrical arranged with the center of spreading head, and vertically the quantity of spreading head is more than or equal to the quantity of horizontal spreading head, like this, the slab of finishing of mating formation just forms one along centrosymmetric structure, and the quantity of the layer of vertically mating formation is more than or equal to the quantity of the layer of laterally mating formation, thereby the parameters such as elastic modelling quantity of the high density oriented wood chipboard that assurance machines meet the standard of container bottom board.
Slab is cut and laminating hot pressing, obtain the high density oriented wood chipboard.After obtaining slab according to aforesaid method, again slab is cut, the slab size according to the rules of finishing that is about to mat formation is cut, the present invention does not have particular restriction to concrete cutting method, adopt that those skilled in the art commonly use mode get final product, after finishing cutting work, the slab of again cutting being finished is positioned on the laminating hot pressing machine, carry out hot press working, the plate blank layer that is about to obtain stacks puts, and then exerts pressure in its vertical direction, thereby increased the adjusting range of the pressure of hot pressing, avoided in the continuous hot-press the restriction of upper pressure limit, obtained larger hot pressing pressure improving the density of oriented wood chipboard, thereby improve its mechanical property.
Particularly, in order to guarantee under the prerequisite of the density that obtains higher oriented wood chipboard, improve the qualification rate of product, the temperature that can make laminating hot pressing more than or equal to 120 ℃ less than or equal to 160 ℃, the ratio range of the thickness of laminating hot pressing time and high density oriented wood chipboard is 80 ~ 120, the concrete laminating hot pressing time can be 1000s ~ 2200s, like this, the water transform that has greatly reduced in adhesive and the wood shavings is gas, has reduced the gas that transforms and the gas that originally is present between the wood shavings to be trapped between the wood shavings, and then has avoided the generation of plate bursting phenomenon, simultaneously, the setting of hot pressing time has improved the density of the oriented wood chipboard of processing, has reached 0.8g/cm
3More than, mechanical property has obtained larger raising.Experimental result shows, the rift grain MOR of the oriented wood chipboard that method provided by the invention obtains more than or equal to 50MPa, band MOR more than or equal to 30MPa; Its modulus of elasticity parellel to grain more than or equal to 5000MPa, tangential elastic module more than or equal to 3000MPa; Its internal bond strength is more than or equal to 0.45MPa; Can bear the dynamic load more than or equal to 2.0T.
After finishing the hot pressing to slab, in order to obtain for commercially available commodity, the present invention will obtain preferably that product cools off, cutting edge, polishing, check, minute etc. processing.The present invention does not have special restriction to described cooling, cutting edge, polishing, the method for checking, grade, and the technical scheme of adopt cooling well known to those skilled in the art, cutting edge, polishing, checking, grade gets final product.Can in the device of sealing, adopt force ventilated method such as cooling processing, also available gravity-flow ventilation cooling, the cooling device of employing can be star cooler; Requirement according to the commodity size is carried out cutting edge to the product that obtains, and can adopt to unite in length and breadth Sawing machine product is carried out cutting edge; Polishing can reduce the thickness deviation of plate, eliminates surface defects, makes the plate face bright and clean, and is easy to use and carry out incrustation, can adopt broadband type abrasive finishing machine abrasive to polish processing; Grinded sheet material can obtain the commercial goods through grading, checking.
The processing method of high density oriented wood chipboard provided by the invention may further comprise the steps: wood shavings are mixed with adhesive, obtain the glue mixing wood shavings; Utilize spreading head that the glue mixing wood shavings are mated formation, obtain slab; Slab is cut and laminating hot pressing, obtains the high density oriented wood chipboard, the temperature of laminating hot pressing more than or equal to 120 ℃ less than or equal to 160 ℃, the ratio range of the thickness of laminating hot pressing time and high density oriented wood chipboard is 80 ~ 120.Like this, in the man-hour that adds of carrying out the high density oriented wood chipboard, at first wood shavings are mixed with adhesive, obtain the glue mixing wood shavings that the surface speckles with adhesive, again the glue mixing wood shavings are mated formation by spreading head, then slab is cut and laminating hot pressing, the slab size according to the rules of finishing that is about to mat formation is cut, then the slab of cutting being finished is positioned on the laminating hot pressing machine, control laminating hot pressing temperature more than or equal to 120 ℃ less than or equal to 160 ℃, the ratio range of the thickness of laminating hot pressing time and high density oriented wood chipboard is 80 ~ 120, finish the making of high density oriented wood chipboard, pressure can be chosen in pressure commonly used in the oriented wood chipboard processing or slightly larger than above-mentioned pressure.Like this, not only increased the adjusting range of the pressure of hot pressing, avoided in the continuous hot-press restriction to upper pressure limit, and the water transform that has greatly reduced in adhesive and the wood shavings is gas, reduced the gas that transforms and the gas that originally is present between the wood shavings to be trapped between the wood shavings, and then avoided the generation of plate bursting phenomenon, simultaneously, by the control to These parameters, the setting of hot pressing time, improve the density of the oriented wood chipboard of processing, reached 0.8g/cm
3More than, the mechanical property of oriented wood chipboard has obtained larger raising.Experimental result shows, the rift grain MOR of the oriented wood chipboard that method provided by the invention obtains more than or equal to 50MPa, band MOR more than or equal to 30MPa; Its modulus of elasticity parellel to grain more than or equal to 5000MPa, tangential elastic module more than or equal to 3000MPa; Its internal bond strength is more than or equal to 0.45MPa; Can bear the dynamic load more than or equal to 2.0T.
Please refer to Fig. 3, the structural representation based on the boxboard of high density oriented wood chipboard that Fig. 3 provides for the embodiment of the invention.
As shown in Figure 3, for solving foregoing problems, the present invention also provides a kind of boxboard based on the high density oriented wood chipboard, comprise that at least one is based on the boxboard unit of high density oriented wood chipboard, boxboard unit based on the high density oriented wood chipboard comprises panel 1, central layer 2 and base plate 3, and central layer 2 is above-mentioned high density oriented wood chipboard, and 2a is the wood shavings end face, 2b is the wood shavings end face, and 2c is the wood shavings side.The density of high density oriented wood chipboard is higher, and has higher mechanical property, and the boxboard of 2 processing has good mechanical property equally take it as central layer, can bear the load-carrying of 7.26T.
The boxboard that the present invention protects, used panel 1 and the material of base plate 3, size, the number of plies etc. do not have special restriction, adopt panel and base plate in the oriented wood chipboard well known to those skilled in the art to get final product.And the material of panel 1 and base plate 3 can be identical, also can be different; The number of plies of the veneer that panel 1 and base plate 3 comprise can be the same or different
In a kind of specific embodiment, can make the panel 1 of above-mentioned boxboard based on the high density oriented wood chipboard have identical structure with base plate 3, like this, guaranteed the symmetry that boxboard is stressed, further improved the service life of boxboard.
Panel 1 and base plate 3 can comprise at least vertical veneer of one deck and the horizontal veneer of one deck, and laterally veneer and central layer 2 directly glue together, and specifically can comprise 1 layer ~ 7 layers veneer, and top plate is preferably clone's veneer; The thickness of veneer is preferably 0.8mm ~ 2.0mm, and the material of veneer can also can be horse traction silk, pine, birch, eucalyptus for cloning wood, one or more in glue wood and the fast growing wood.Clone a little less than the wooden gloss, without special flavour, the resin smell is often arranged, texture usually straight, structure omits thick; Slightly evenly; Natural defect seldom; Heavy to omiting in the timber weight, bronzing; The horse traction silk is that a kind of wood grain is attractive in appearance, has the timber of certain degree of hardness.
For addressing the above problem, the present invention also provides the method for a kind of processing based on the boxboard of high density oriented wood chipboard, may further comprise the steps:
Processing high density oriented wood chipboard, concrete processing method such as aforementioned does not repeat them here.
Stack successively the another one in one, high density oriented wood chipboard and base plate and the panel in base plate and the panel; Certainly, all scribble adhesive with the contacted side of high density oriented wood chipboard in above-mentioned base plate and the panel, so as when hot pressing and the high density oriented wood chipboard produce enough gummed power.
Hot pressing obtains the boxboard based on the high density oriented wood chipboard.This paper does not have special restriction for the mode of hot pressing, and all methods well-known to those skilled in the art all are fine.
In order to further specify the present invention, below in conjunction with embodiment high density oriented wood chipboard provided by the invention and preparation method thereof is described in detail, but they can not be interpreted as restriction to protection domain of the present invention.
The adhesive of using among the following embodiment of being is available from branch company of this group.
Embodiment 1
It is that 120mm, width are that 20mm and thickness are the wood shavings of 0.5mm that length is provided, according to the mass ratio of wood shavings and adhesive be 100:18 adhesive is sprayed and atomizing on the surface of wood shavings, finish the glue-applying technique to wood shavings; Adopt spreading machine along wood shavings grain direction mutual orientation stacked arrangement the wood shavings that mix with adhesive that obtain, wood shavings are mated formation, obtain slab; The slab that obtains is carried out hot repressing after the precompressed, and the pressure of hot pressing is 2.9MPa～3.3MPa, and temperature is 135 ℃～145 ℃, and the time is 1150s～1300s, obtains the high density oriented wood chipboard.
The present invention carries out performance test with the high density oriented wood chipboard that obtains, density is measured according to the method for 4.2 records among the GB GB/T17657-1999, moisture content is measured according to the method for 4.3 records among the GB GB/T 17657-1999 " Test methods of evaluating the properties of woodbased panels and surface decorated woodbased panels ", thickness swelling rate is measured according to the method for 4.5 records among the GB/T 17657-1999 " Test methods of evaluating the properties of woodbased panels and surface decorated woodbased panels ", internal bond strength is measured according to the method for the record of 4.8 among the GB GB/T 17657-1999, MOR and elastic modelling quantity are measured according to the method for 4.9 records among the GB GB/T 17657-1999, the result is as shown in table 1, the performance test results of the oriented wood chipboard that table 1 obtains for the embodiment of the invention 1 ~ 5.
The present invention carries out deep processing with the high density oriented wood chipboard that obtains, and is processed into the boxboard based on the high density oriented wood chipboard, uses it for the bottom of container.The present invention has carried out performance test with the boxboard that obtains, and the result is as shown in table 2, the performance test results of the boxboard that table 2 obtains for the embodiment of the invention 1 ~ 5.
It is that 110mm, width are that 15mm and thickness are the wood shavings of 0.45mm that length is provided, and being 100:18 according to the mass ratio of wood shavings and adhesive is sprayed at the surface of wood shavings with adhesive, finishes the glue-applying technique to wood shavings; Adopt spreading machine along wood shavings grain direction mutual orientation stacked arrangement the wood shavings that mix with adhesive that obtain, wood shavings are mated formation, obtain slab; The slab that obtains is carried out hot repressing after the precompressed, and the pressure of hot pressing is 2.7MPa～3.1MPa, and temperature is 130 ℃～140 ℃, and the time is 1300s～1450s, obtains the high density oriented wood chipboard.
The present invention carries out performance test with the high density oriented wood chipboard that obtains, density is measured according to the method for 4.2 records among the GB GB/T17657-1999, moisture content is measured according to the method for 4.3 records among the GB GB/T 17657-1999 " Test methods of evaluating the properties of woodbased panels and surface decorated woodbased panels ", thickness swelling rate is measured according to the method for 4.5 records among the GB/T 17657-1999 " Test methods of evaluating the properties of woodbased panels and surface decorated woodbased panels ", internal bond strength is measured according to the method for the record of 4.8 among the GB GB/T 17657-1999, MOR and elastic modelling quantity are measured according to the method for 4.9 records among the GB GB/T 17657-1999, the result is as shown in table 1, the performance test results of the high density oriented wood chipboard that table 1 obtains for the embodiment of the invention 1 ~ 5.
The present invention carries out deep processing with the high density oriented wood chipboard that obtains, and is processed into based on high density oriented wood chipboard boxboard, uses it for the bottom of container.The present invention has carried out performance test with the boxboard that obtains, and the result is as shown in table 2, the performance test results of the boxboard that table 2 obtains for the embodiment of the invention 1 ~ 5.
It is that 125mm, width are that 25mm and thickness are the wood shavings of 0.55mm that length is provided, and being 100:18 according to the mass ratio of wood shavings and adhesive is sprayed at the surface of wood shavings with adhesive, finishes the glue-applying technique to wood shavings; Adopt spreading machine along wood shavings grain direction mutual orientation stacked arrangement the wood shavings that mix with adhesive that obtain, wood shavings are mated formation, obtain slab; The slab that obtains is carried out hot repressing after the precompressed, and the pressure of hot pressing is 3.1MPa～3.5MPa, and temperature is 135 ℃～145 ℃, and the time is 1200s～1250s, obtains the high density oriented wood chipboard.
The present invention carries out performance test with the high density oriented wood chipboard that obtains, density is measured according to the method for 4.2 records among the GB GB/T17657-1999, moisture content is measured according to the method for 4.3 records among the GB GB/T 17657-1999 " Test methods of evaluating the properties of woodbased panels and surface decorated woodbased panels ", thickness swelling rate is measured according to the method for 4.5 records among the GB/T 17657-1999 " Test methods of evaluating the properties of woodbased panels and surface decorated woodbased panels ", internal bond strength is measured according to the method for the record of 4.8 among the GB GB/T 17657-1999, MOR and elastic modelling quantity are measured according to the method for 4.9 records among the GB GB/T 17657-1999, the result is as shown in table 1, the performance test results of the high density oriented wood chipboard that table 1 obtains for the embodiment of the invention 1 ~ 5.
The present invention carries out deep processing with the high density oriented wood chipboard that obtains, and is processed into based on high density oriented wood chipboard boxboard, uses it for the bottom of container.The present invention has carried out performance test with the boxboard that obtains, and the result is as shown in table 2, the performance test results of the boxboard that table 2 obtains for the embodiment of the invention 1 ~ 5.
Embodiment 4
It is that 100mm, width are that 10mm and thickness are the wood shavings of 0.4mm that length is provided, and being 100:18 according to the mass ratio of wood shavings and adhesive is sprayed at the surface of wood shavings with adhesive, finishes the glue-applying technique to wood shavings; Adopt spreading machine along wood shavings grain direction mutual orientation stacked arrangement the wood shavings that mix with adhesive that obtain, wood shavings are mated formation, obtain slab; The slab that obtains is carried out hot repressing after the precompressed, and the pressure of hot pressing is 2.6MPa～3.0MPa, and temperature is 125 ℃～135 ℃, and the time is 1400s～1500s, obtains the high density oriented wood chipboard.
The present invention carries out performance test with the high density oriented wood chipboard that obtains, density is measured according to the method for 4.2 records among the GB GB/T17657-1999, moisture content is measured according to the method for 4.3 records among the GB GB/T 17657-1999 " Test methods of evaluating the properties of woodbased panels and surface decorated woodbased panels ", thickness swelling rate is measured according to the method for 4.5 records among the GB/T 17657-1999 " Test methods of evaluating the properties of woodbased panels and surface decorated woodbased panels ", internal bond strength is measured according to the method for the record of 4.8 among the GB GB/T 17657-1999, MOR and elastic modelling quantity are measured according to the method for 4.9 records among the GB GB/T 17657-1999, the result is as shown in table 1, the performance test results of the high density oriented wood chipboard that table 1 obtains for the embodiment of the invention 1 ~ 5.
The present invention carries out deep processing with the high density oriented wood chipboard that obtains, and is processed into based on high density oriented wood chipboard boxboard, uses it for the bottom of container.The present invention has carried out performance test with the boxboard that obtains, and the result is as shown in table 2, the performance test results of the boxboard that table 2 obtains for the embodiment of the invention 1 ~ 5.
Embodiment 5
It is that 130mm, width are that 30mm and thickness are the wood shavings of 0.6mm that length is provided, and being 100:18 according to the mass ratio of wood shavings and adhesive is sprayed at the surface of wood shavings with adhesive, finishes the glue-applying technique to wood shavings; Adopt spreading machine along wood shavings grain direction mutual orientation stacked arrangement the wood shavings that mix with adhesive that obtain, wood shavings are mated formation, obtain slab; The slab that obtains is carried out hot repressing after the precompressed, and the pressure of hot pressing is 3.3MPa～3.7MPa, and temperature is 145 ℃～160 ℃, and the time is 1450s～1700s, obtains the high density oriented wood chipboard.
The present invention carries out performance test with the high density oriented wood chipboard that obtains, density is measured according to the method for 4.2 records among the GB GB/T17657-1999, moisture content is measured according to the method for 4.3 records among the GB GB/T 17657-1999 " Test methods of evaluating the properties of woodbased panels and surface decorated woodbased panels ", thickness swelling rate is measured according to the method for 4.5 records among the GB/T 17657-1999 " Test methods of evaluating the properties of woodbased panels and surface decorated woodbased panels ", internal bond strength is measured according to the method for the record of 4.8 among the GB GB/T 17657-1999, MOR and elastic modelling quantity are measured according to the method for 4.9 records among the GB GB/T 17657-1999, the result is as shown in table 1, the performance test results of the high density oriented wood chipboard that table 1 obtains for the embodiment of the invention 1 ~ 5.
The present invention carries out deep processing with the high density oriented wood chipboard that obtains, and is processed into based on high density oriented wood chipboard boxboard, uses it for the bottom of container.The present invention has carried out performance test with the boxboard that obtains, and the result is as shown in table 2, the performance test results of the boxboard that table 2 obtains for the embodiment of the invention 1 ~ 5.
The performance test results of the high density oriented wood chipboard that table 1 embodiment of the invention 1 ~ 5 obtains.
As can be seen from Table 1, oriented wood chipboard provided by the invention has higher MOR and elastic modelling quantity, can bear the load-carrying above 2.0T, is beneficial to its application.
The performance test results of the boxboard that table 2 embodiment of the invention 1 ~ 5 obtains
As can be seen from Table 2, when high density oriented wood chipboard provided by the invention is processed into the container boxboard, can bear the load-carrying above 7.26T, have higher using value.
The above only is preferred embodiment of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (22)
1. a high density oriented wood chipboard is characterized in that, its density is more than or equal to 0.8g/cm
3Described high density oriented wood chipboard obtains by laminating hot pressing, the temperature of described laminating hot pressing more than or equal to 120 ℃ less than or equal to 160 ℃, the ratio range of the thickness of the time of described laminating hot pressing and described high density oriented wood chipboard is 80 ~ 120, described ratio is in s/mm.
2. high density oriented wood chipboard according to claim 1 is characterized in that, the time of described laminating hot pressing is 1000s ~ 2200s.
3. high density oriented wood chipboard according to claim 1 is characterized in that, the thickness of the wood shavings of described high density oriented wood chipboard is 0.4mm ~ 0.8mm.
4. high density oriented wood chipboard according to claim 1 is characterized in that, the moisture content of the wood shavings of described high density oriented wood chipboard is 4% ~ 8%.
5. high density oriented wood chipboard according to claim 1 is characterized in that, the air-dry density of the wood shavings of described high density oriented wood chipboard is more than or equal to 0.5g/cm
3
6. high density oriented wood chipboard according to claim 1 is characterized in that, the wood shavings of described high density oriented wood chipboard comprise that air-dry density is less than 0.5g/cm
3The softwood wood shavings and air-dry density more than or equal to 0.5g/cm
3Hard material wood shavings.
7. high density oriented wood chipboard according to claim 6, it is characterized in that, described high density oriented wood chipboard comprises hard material wood shavings mat formation layer and the softwood wood shavings layer of mating formation, and the described hard material wood shavings wood shavings mass ratio that wood shavings and the described softwood wood shavings of layer mat formation layer of mating formation is (10 ~ 25): (75 ~ 90).
8. high density oriented wood chipboard according to claim 1, it is characterized in that, comprise the layer of mating formation, down mat formation layer and the centre layer of mating formation, mat formation on described layer and described lower mat formation layer be that the layer of vertically mating formation, described centre are mated formation and layer comprise at least one layer of laterally mating formation.
9. high density oriented wood chipboard according to claim 8, it is characterized in that, the Central Symmetry setting with described high density oriented wood chipboard of described vertically mat formation layer and the described layer of laterally mating formation, and the quantity of the described layer of vertically mating formation is more than or equal to the quantity of the described layer of laterally mating formation.
10. the processing method of a high density oriented wood chipboard may further comprise the steps:
Described wood shavings are mixed with adhesive, obtain the glue mixing wood shavings;
Utilize spreading head that described glue mixing wood shavings are mated formation, obtain slab;
Described slab is cut and laminating hot pressing, obtain the high density oriented wood chipboard, the temperature of described laminating hot pressing more than or equal to 120 ℃ less than or equal to 160 ℃, the ratio range of the thickness of the time of described laminating hot pressing and described high density oriented wood chipboard is 80 ~ 120, described ratio is in s/mm.
11. the processing method of high density oriented wood chipboard according to claim 10 is characterized in that, the time of described laminating hot pressing is 1000s ~ 2200s.
12. the processing method of high density oriented wood chipboard according to claim 10 is characterized in that, the thickness of described wood shavings is 0.4mm ~ 0.8mm.
13. the processing method of high density oriented wood chipboard according to claim 10 is characterized in that, the moisture content of described wood shavings is 4% ~ 8%.
14. the processing method of high density oriented wood chipboard according to claim 10 is characterized in that, the air-dry density of described wood shavings is more than or equal to 0.5g/cm
3
15. the processing method of high density oriented wood chipboard according to claim 10 is characterized in that, described wood shavings comprise that air-dry density is greater than 0.5g/cm
3Hard material wood shavings, and air-dry density is less than or equal to 0.5g/cm
3The softwood wood shavings.
16. the processing method of high density oriented wood chipboard according to claim 15, it is characterized in that, described high density oriented wood chipboard comprises hard material wood shavings mat formation layer and the softwood wood shavings layer of mating formation, and the described hard material wood shavings wood shavings mass ratio that wood shavings and the described softwood wood shavings of layer mat formation layer of mating formation is (10 ~ 25): (75 ~ 90).
17. the processing method of high density oriented wood chipboard according to claim 10, it is characterized in that, described spreading head comprises front spreading head at leading section, at rear spreading head and the middle spreading head between front spreading head and rear spreading head of afterbody, front spreading head and rear spreading head are vertical spreading head, and described middle spreading head comprises at least one horizontal spreading head.
18. the processing method of high density oriented wood chipboard according to claim 17, it is characterized in that, described vertical spreading head and described horizontal spreading head are symmetrical arranged with the center of described spreading head, and the quantity of described vertical spreading head is more than or equal to the quantity of described horizontal spreading head.
19. boxboard based on the high density oriented wood chipboard, it is characterized in that, comprise that at least one is based on the boxboard unit of high density oriented wood chipboard, described boxboard unit based on the high density oriented wood chipboard comprises panel, central layer and base plate, and described central layer is each described high density oriented wood chipboard of claim 1 to 9.
20. the boxboard based on the high density oriented wood chipboard according to claim 19 is characterized in that, described panel has identical structure with described base plate.
21. the boxboard based on the high density oriented wood chipboard according to claim 20 is characterized in that, described panel and described base plate include at least vertical veneer of one deck and the horizontal veneer of one deck, and described horizontal veneer and described central layer directly glue together.
22. a processing may further comprise the steps based on the method for the boxboard of high density oriented wood chipboard:
Processing is such as each described high density oriented wood chipboard of claim 1 to 9;
Stack successively the another one in the one in described base plate and the described panel, described high density oriented wood chipboard and described base plate and the described panel;
Hot pressing obtains the boxboard based on the high density oriented wood chipboard.
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| CN103286840B (en) * | 2013-06-28 | 2014-06-25 | 江苏快乐木业集团有限公司 | Oriented strand board boxboard |
| CN103341899B (en) * | 2013-06-28 | 2015-07-15 | 江苏快乐木业集团有限公司 | Method for processing oriented strand board boxboard |
| CN103878836A (en) * | 2014-04-02 | 2014-06-25 | 湖北益嘉林业发展有限公司 | Multilayered solid wood structural slab production technology |
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| CN103072172B (en) | 2013-12-11 |
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