CN103072172B - 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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- CN103072172B CN103072172B CN2012105397085A CN201210539708A CN103072172B CN 103072172 B CN103072172 B CN 103072172B CN 2012105397085 A CN2012105397085 A CN 2012105397085A CN 201210539708 A CN201210539708 A CN 201210539708A CN 103072172 B CN103072172 B CN 103072172B
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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; namely slabs are cut, then the cut slabs are put on a stacking and hot-pressing machine for hot-pressing. An air-dry density of wood shavings of the high-density oriented strand board is more than 0.5g.cm<3>, and a temperature for stacking and hot-pressing is higher than or equal to 120 DEG C but lower than or equal to 145 DEG C. A 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. By using the high-density oriented strand board disclosed by the invention, 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 and the generation of the board explosion phenomenon are lowered, 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 saving timber resources.
Wood-based plate refers to that take timber or other non-wood plants is 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 raw material such as timber to be cut into to the fragment of certain specification, through super-dry, mix with adhesive, curing agent, waterproofing agent, a kind of artificial board that compacting forms at a certain temperature, 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 be 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, 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, the Chinese patent that publication number is 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, 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 after five layers of applying glue and 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 manufacture, enter applying glue by screening after drying, then mat formation production line leading portion and the back segment at OSB respectively increases by a joint spreading machine, at OSB, the surface layer before moulding 1 ' and bottom 3 ' do not increase one deck fines, then through hot pressing and plain plate, process, make smooth smooth particieboard.The oriented wood chipboard of producing by this mode, 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 remaining dry/wet rotary cut venner leftover pieces of glued board processing, thickness is at 0.4～0.9mm; The moisture content of wet veneer is 30%～50%, and the moisture content of dry veneer is 15%～20%; (2) guillotine cutting: with cutting machine, respectively wet veneer and dry veneer are carried out to guillotine cutting, the Chang Du<=170mm of the wood shavings of guillotine cutting; (3) fragmentation: crusher in crushing, control wood shavings Kuan Du<=40mm, Chang Du<=170mm; (4) carry: by conveyer belt, the wood shavings after screening are delivered to the wet feed storehouse; (5) drying: the wet wood shavings in the wet feed storehouse are carried out to 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 to 0.9mm separate; (7) screening: dried wood shavings are separated according to size, reject the wood shavings that length and width are less than 3mm, using the wood shavings of length >=40mm, width >=5mm as the top layer wood shavings, remaining wood shavings are as the sandwich layer wood shavings; (8) glue compounding and applying: adhesive is sprayed to the surface of the wood shavings after screening, after applying glue, sandwich layer wood shavings moisture content is 8～12%, and top layer wood shavings moisture content is 10～15%; (9) mat formation: through spreading machine, the wood shavings orienting spreading is pressed into to slab in advance, the slab density of mating formation is 570～630kg/m3; (10) hot pressing: control board briquette 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 is cooling after hot pressing, then is sawed limit and make oriented wood chipboard.The oriented wood chipboard of producing by said method, 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 affect the quality of mating formation, make to mat formation inhomogeneous, and then affect the intensity of particieboard, be difficult to meet 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 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 be made into by the method has higher density, and there is good mechanical property, can as container floor, use separately, but, while by said method, carrying out the processing and fabricating of oriented wood chipboard, on the one hand, continuous hot-press refers to the hot pressing of carrying out in the process of constantly moving at oriented wood chipboard, the upper limit of its pressure (being tonnage) will guarantee can not affect the motion of oriented wood chipboard, therefore pressure is difficult for excessive, on the other hand, oriented wood chipboard will complete 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 processing smoothly and product percent of pass, produce and there is higher force and learn performance, can be applied to the oriented wood chipboard of container bottom board, just become the current 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 can be eliminated the restriction to pressure adding man-hour, avoid the generation of plate bursting phenomenon, on the basis that guarantees processing smoothly and product percent of pass, produce and there is higher force performance, can be applied to the oriented wood chipboard of container bottom board.Another object of the present invention is to provide 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, is about to the slab cutting, and the plate blank layer then cutting completed stacks to be placed on the laminating hot pressing machine carries out the hot pressing acquisition, and the air-dry density of the wood shavings of high density oriented wood chipboard is greater than 0.5g/cm
3the length of wood shavings is 100mm～130mm, width is 20mm～30mm, thickness is 0.6mm～0.8mm, and the mass ratio of wood shavings and adhesive is 100:(10～25), the mass ratio of adhesive and water is (39～48): (61～52), the temperature of laminating hot pressing is more than or equal to 120 ℃ and is less than or equal to 145 ℃, the pressure of laminating hot pressing is 3.1MPa～3.7Mpa, and the ratio range of the thickness of the time of laminating hot pressing and high density oriented wood chipboard is 80～120, and ratio is in s/mm.
Preferably, the time of laminating hot pressing is 1150s～1700s.
Preferably, the moisture content of the wood shavings of high density oriented wood chipboard is 4%～8%.
Preferably, comprise the layer of mating formation, under mat formation layer and the centre layer of mating formation, above mat formation layer and under the layer of mating formation be the layer of vertically mating formation, mat formation and layer comprise at least one layer of laterally mating formation in centre.
Preferably, the setting of the Central Symmetry 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, comprises the following steps:
Wood shavings are mixed with adhesive, obtain the glue mixing wood shavings, the air-dry density of wood shavings is more than or equal to 0.5g/cm
3, the length of wood shavings is 100mm～130mm, and width is 20mm～30mm, and thickness is 0.6mm～0.8mm, the mass ratio of wood shavings and adhesive is 100:(10～25), the mass ratio of adhesive and water is (39～48): (61～52);
Utilize spreading head to be mated formation to the glue mixing wood shavings, obtain slab;
The plate blank layer of slab being cut and cutting being completed stacks to be placed on the laminating hot pressing machine carries out hot pressing, obtain the high density oriented wood chipboard, the temperature of laminating hot pressing is more than or equal to 120 ℃ and is less than or equal to 160 ℃, the pressure of laminating hot pressing is 3.1MPa～3.7MPa, the ratio range of the thickness of the time of laminating hot pressing and high density oriented wood chipboard is 80～120, and ratio is in s/mm.
Preferably, the time of laminating hot pressing is 1150s～1700s.
Preferably, the moisture content of wood shavings is 4%～8%.
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 at least one boxboard unit based on the 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 and base plate have identical structure.
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 the boxboard of a kind of processing based on the high density oriented wood chipboard, comprises the following 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 panel;
Hot pressing, obtain 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, is about to the slab cutting, and the plate blank layer then cutting completed stacks to be placed on the laminating hot pressing machine carries out the hot pressing acquisition, and the air-dry density of the wood shavings of high density oriented wood chipboard is greater than 0.5g/cm
3the length of wood shavings is 100mm～130mm, width is 20mm～30mm, thickness is 0.6mm～0.8mm, and the mass ratio of wood shavings and adhesive is 100:(10～25), the mass ratio of adhesive and water is (39～48): (61～52), the temperature of laminating hot pressing is more than or equal to 120 ℃ and is less than or equal to 145 ℃, the pressure of laminating hot pressing is 3.1MPa～3.7Mpa, and the ratio range of the thickness of the time of laminating hot pressing and high density oriented wood chipboard is 80～120, and 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 surface speckles with adhesive, again the glue mixing wood shavings are mated formation by spreading head, then by slab cutting and laminating hot pressing, being about to slab is positioned on the laminating hot pressing machine, the temperature of controlling laminating hot pressing is more than or equal to 120 ℃ and is less than or equal to 145 ℃, the ratio range of the thickness of the time of laminating hot pressing and high density oriented wood chipboard is 80～120, complete the making of high density oriented wood chipboard, pressure can be chosen in pressure commonly used in 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 greatly reduced in adhesive and wood shavings by the control to index is gas, reduced the gas transformed and the gas originally be present between wood shavings to be trapped between wood shavings, and then avoided the generation of plate bursting phenomenon, simultaneously, the setting of hot pressing time, improved the density of the oriented wood chipboard of processing, reached 0.8g/cm
3above, 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 is more than or equal to 50MPa, the band MOR is more than or equal to 30MPa; Its modulus of elasticity parellel to grain is more than or equal to 5000MPa, tangential elastic module is more than or equal to 3000MPa; Its internal bond strength is more than or equal to 0.45MPa; Can bear the dynamic load that is more than or equal to 2.0T.
The beneficial effect of the beneficial effect of the processing method of high density oriented wood chipboard provided by the present invention, the boxboard based on the high density oriented wood chipboard and preparation method thereof and the processing method of high density oriented wood chipboard is similar, does not repeat them here.
The accompanying drawing explanation
The structural scheme of mechanism that Fig. 1 is a kind of oriented wood chipboard in 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 present invention;
The structural representation of the boxboard based on the high density oriented wood chipboard that Fig. 3 provides for the embodiment of the present invention.
The specific embodiment
Core of the present invention is to provide a kind of high density oriented wood chipboard, this high density oriented wood chipboard can be eliminated the restriction to pressure adding man-hour, avoid the generation of plate bursting phenomenon, on the basis that guarantees processing smoothly and product percent of pass, produce and there is higher force performance, can be applied to the oriented wood chipboard of container bottom board.Another core of the present invention is to provide 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, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
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 present invention.
As shown in FIG., high density oriented wood chipboard provided by the present invention, specifically comprise that 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, be about to the slab cutting, then plate blank layer cutting completed stacks to be placed on the laminating hot pressing machine carries out the hot pressing acquisition, the temperature of laminating hot pressing is more than or equal to 120 ℃ and is less than or equal to 145 ℃, the ratio range of the thickness of the time of laminating hot pressing and high density oriented wood chipboard is 80～120, and 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, direction that can be vertical at it is exerted pressure, 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 to improve the density of oriented wood chipboard, thereby improve its mechanical property.Temperature while simultaneously controlling laminating hot pressing is more than or equal to 120 ℃ and is less than or equal to 145 ℃, the ratio range of the thickness of laminating hot pressing time and high density oriented wood chipboard is 80～120, the water transform greatly reduced in adhesive and wood shavings is gas, the gas that has reduced the gas of conversion and originally be present between wood shavings is trapped between 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
3above, 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 is more than or equal to 50MPa, the band MOR is more than or equal to 30MPa; Its modulus of elasticity parellel to grain is more than or equal to 5000MPa, tangential elastic module is more than or equal to 3000MPa; Its internal bond strength is more than or equal to 0.45MPa; Can bear the dynamic load that is more than or equal to 2.0T.
Certainly, be subject to the impact of concrete high density oriented shaving plate thickness, the scope of the time of laminating hot pressing can be 1150s～1700s.
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 0.6mm～0.8mm.
Research shows, the size of wood shavings has a certain impact for the quality of oriented wood chipboard, the thickness of wood shavings particularly, on the one hand, in wood shavings and adhesive carry out mixed process, 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, have and have the wood shavings that exist with pure wood shavings form in a large number, make the density that machines oriented wood chipboard lower, thereby strength decreased, and wood shavings are crossed the difficulty that Bao Youhui causes wood shavings processing; On the other hand, in the situation that identical oriented shaving plate thickness, the thickness of wood shavings is thicker, the wood shavings number of plies needed 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, reduced density and the intensity of oriented wood chipboard, for this reason, the thickness of wood shavings has been chosen to be to 0.6mm～0.8mm.
Simultaneously, the moisture content of wood shavings also has a certain impact to the processing of high density oriented wood chipboard success, and the moisture in timber is in the situation that be heated and can vaporize, and then has increased the amount of gas, has strengthened the risk of plate bursting; And if the hypohydration in timber can make again the rigidity of wood shavings and tensile property descend, cause the difficulty of hot pressing, affect intensity and the mechanical property of oriented wood chipboard simultaneously, 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 that do not infiltrate through adhesive, for this reason, the air-dry density of the wood shavings of high density oriented wood chipboard is chosen to be and is more than or equal to 0.5g/cm
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 there is higher MOR and elastic modelling quantity, reduce costs simultaneously, can make wood shavings comprise that air-dry density is less than 0.5g/cm
3the softwood wood shavings, comprise that again air-dry density is greater than 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, under mat formation layer and the centre layer of mating formation, wherein, mat formation layer and under the layer of mating formation be the layer of vertically mating formation, mat formation and layer comprise at least one layer of laterally mating formation in centre.Like this, be easier to improve the density of high density oriented wood chipboard, obtain higher intensity, the boxboard that it is further added to the work container can bear the load-carrying that is greater than 7.26T.
Certainly, vertically mat formation the layer and laterally mat formation the layer the setting of the Central Symmetry 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 high density oriented wood chipboard is used as container bottom board, guaranteed that the parameters such as elastic modelling quantity of the high density oriented wood chipboard that machines meet the standard of container bottom board simultaneously.
The invention provides a kind of processing method of high density oriented wood chipboard, comprise the following 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 manufacturing oriented wood chipboard to the source of described wood shavings, material, size etc. can.
Research shows, the size of wood shavings has a certain impact for the quality of oriented wood chipboard, if the long quality of can impact mating formation of the length of wood shavings makes wood shavings mat formation 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 obtained 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, easily causes glue-line to be peeled off, and makes bonding strength descend; The impact of the thickness of wood shavings is larger, on the one hand, in wood shavings and adhesive carry out mixed process, 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, have and have the wood shavings that exist with pure wood shavings form in a large number, make the density that machines oriented wood chipboard lower, thereby strength decreased, and wood shavings are crossed the difficulty that Bao Youhui causes wood shavings processing; On the other hand, in the situation that identical oriented shaving plate thickness, the thickness of wood shavings is thicker, the wood shavings number of plies needed 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, reduced density and the intensity of oriented wood chipboard, for this reason, the thickness of wood shavings has been chosen to be to 0.6mm～0.8mm.
The present invention does not have clear and definite restriction for length and the width of wood shavings, the familiar Flake geometry of those skilled in the art all is fine, but, because the length of wood shavings and the width quality to oriented wood chipboard also has a certain impact, for this reason, can adopt length is 100mm～130mm, and width is 20mm～30mm wood shavings.
Easily understand, all processing of the preorder to wood shavings is all in order to form the high density oriented wood chipboard, and the key of the production qualification rate of raising high density oriented wood chipboard is a bit to reduce the probability that the plate bursting phenomenon occurs; Yet, well-known, contain moisture in timber, water is in the situation that be heated and can vaporize, and then increased the amount of gas, strengthened the risk of plate bursting; And the hypohydration in timber, can make again rigidity and the tensile property of wood shavings descend, cause the difficulty of hot pressing, affect intensity and the mechanical property of oriented wood chipboard simultaneously, therefore, in order to guarantee success (qualified) rate of processing, need to be controlled the moisture content in wood shavings, the moisture content that specifically can make wood shavings is 4%～8%.
The method that the present invention is controlled the moisture content of wood shavings does not have special restriction, and all modes well-known to those skilled in the art can.
Known according to aforementioned content, 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, preferably air-dry density is greater than 0.5g/cm
3timber, the air-dry density of wood shavings need to be greater than 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 there is higher MOR and elastic modelling quantity, can also select to comprise air-dry density simultaneously and be less than 0.5g/cm
3timber (as fast growing woods such as pine, poplars) and air-dry density>=0.5g/cm
3timber (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, and the technical scheme that adopts wood shavings well known to those skilled in the art to prepare gets final product.It is CARMANAH34/114BLOCK 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 carrying out the wood shavings of next step processing, then 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's research shows, in the manufacturing process of oriented wood chipboard, if resin added is crossed conference, causes bubbling, 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, makes product easily be out of shape, and 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, in order to make adhesive, with wood shavings, fully contact, adhesive can be utilized air pressure carry out atomization, then make the adhesive of atomization fall on the wood shavings that constantly are stirred.The present invention does not have special restriction to the selection of described adhesive, adopts adhesive well known to those skilled in the art to get final product, 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, Process of Applying Glue by the glue that obtains for wood shavings, the present invention does not have special restriction to the mass ratio of described adhesive and water, adopt the mass ratio of adhesive and water in glue well known to those skilled in the art to get final product, 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 obtained 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 obtained can not reduce its intensity because of imbibition under the prerequisite with stronger bonding strength.
After obtaining the glue mixing wood shavings, then utilize spreading head to be mated formation the glue mixing wood shavings, obtain slab.In 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, for guaranteeing that the high density oriented wood chipboard of processing is more suitable, as container bottom board, use, 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 having mated 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 there is higher density, and there is higher intensity, used as the boxboard of container, can bear the load-carrying that is greater than 7.26T, be beneficial to its application.
For mechanical property and the bonding strength that further improves the high density oriented wood chipboard, can make vertical spreading head and horizontal spreading head be 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 having mated 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, obtained the high density oriented wood chipboard.After obtaining slab according to aforesaid method, again slab is cut, the slab that is about to mat formation size is according to the rules cut, the present invention is not particularly limited concrete cutting method, adopt those skilled in the art to commonly use mode get final product, after completing cutting work, the slab again cutting completed is positioned on the laminating hot pressing machine, carry out hot press working, the plate blank layer that is about to obtain stacks puts, then at it, vertical direction is exerted pressure, 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 to improve 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, can make the temperature of laminating hot pressing be more than or equal to 120 ℃ and be less than or equal to 145 ℃, 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 1150s～1700s, like this, the water transform greatly reduced in adhesive and wood shavings is gas, the gas that has reduced the gas of conversion and originally be present between wood shavings is trapped between wood shavings, and then avoided the generation of plate bursting phenomenon, simultaneously, the setting of hot pressing time, improved the density of the oriented wood chipboard of processing, reached 0.8g/cm
3above, 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 is more than or equal to 50MPa, the band MOR is more than or equal to 30MPa; Its modulus of elasticity parellel to grain is more than or equal to 5000MPa, tangential elastic module is more than or equal to 3000MPa; Its internal bond strength is more than or equal to 0.45MPa; Can bear the dynamic load that is more than or equal to 2.0T.
After completing the hot pressing to slab, in order to obtain for commercially available commodity, the present invention preferably will obtain product carry out cooling, 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, cutting edge, polishing well known to those skilled in the art, checking, grade gets final product.As cooling processing can adopt force ventilated method in the device of sealing, also available gravity-flow ventilation is cooling, and the cooling device of employing can be star cooler; According to the requirement of commodity size, the product obtained is carried out to cutting edge, can adopt and combine in length and breadth Sawing machine product is carried out to cutting edge; Polishing can reduce the thickness deviation of plate, eliminates surface defects, makes the plate face bright and clean, easy to use and carry out incrustation, can adopt broadband type abrasive finishing machine abrasive to polish processing; Grinded sheet material can obtain commercial goods through grading, checking.
The processing method of high density oriented wood chipboard provided by the invention comprises the following steps: wood shavings are mixed with adhesive, obtain the glue mixing wood shavings; Utilize spreading head to be mated formation to the glue mixing wood shavings, obtain slab; Slab is cut and laminating hot pressing, obtain the high density oriented wood chipboard, the temperature of laminating hot pressing is more than or equal to 120 ℃ and is less than or equal to 145 ℃, and 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 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 that is about to mat formation size is according to the rules cut, then slab cutting completed is positioned on the laminating hot pressing machine, the temperature of controlling laminating hot pressing is more than or equal to 120 ℃ and is less than or equal to 145 ℃, the ratio range of the thickness of laminating hot pressing time and high density oriented wood chipboard is 80～120, complete the making of high density oriented wood chipboard, pressure can be chosen in pressure commonly used in 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 greatly reduced in adhesive and wood shavings is gas, reduced the gas transformed and the gas originally be present between wood shavings to be trapped between 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
3above, 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 is more than or equal to 50MPa, the band MOR is more than or equal to 30MPa; Its modulus of elasticity parellel to grain is more than or equal to 5000MPa, tangential elastic module is more than or equal to 3000MPa; Its internal bond strength is more than or equal to 0.45MPa; Can bear the dynamic load that is more than or equal to 2.0T.
Please refer to Fig. 3, the structural representation of the boxboard based on the high density oriented wood chipboard that Fig. 3 provides for the embodiment of the present 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 at least one boxboard unit based on the 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, take its boxboard as central layer 2 processing to have equally good mechanical property, can bear the load-carrying of 7.26T.
The boxboard that the present invention protects, panel 1 used and the material of base plate 3, size, the number of plies etc. do not have special restriction, adopt panel and base plate in 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 the above-mentioned boxboard based on the high density oriented wood chipboard and base plate 3 there is identical structure, 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 be also horse traction silk, pine, birch, eucalyptus for cloning wood, one or more in glue wood and fast growing wood.A little less than cloning wooden gloss, without special flavour, the resin smell is often arranged, texture straight, structure usually omits thick; Slightly evenly; Natural defect seldom; Heavy to omiting in 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 the boxboard of a kind of processing based on the high density oriented wood chipboard, comprises the following steps:
Processing high density oriented wood chipboard, concrete processing method, 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 panel; Certainly, in above-mentioned base plate and panel, with the contacted side of high density oriented wood chipboard, all scribble adhesive, so as when hot pressing and the high density oriented wood chipboard produce enough gummed power.
Hot pressing, obtain 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 illustrate 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 to limiting the scope of the present invention.
The adhesive of using in the following embodiment of being is purchased from branch company of this group.
Embodiment 1
It is that 120mm, width are the wood shavings that 20mm and thickness are 0.5mm that length is provided, according to the mass ratio of wood shavings and adhesive be 100:18 adhesive is sprayed and atomization on the surface of wood shavings, complete 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 obtained is carried out to hot repressing after 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 by the high density oriented wood chipboard obtained, density is measured according to the method for 4.2 records in GB GB/T17657-1999, moisture content is measured according to the method for 4.3 records in GB GB/T17657-1999 " 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 in GB/T17657-1999 " 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 in GB GB/T17657-1999, MOR and elastic modelling quantity are measured according to the method for 4.9 records in GB GB/T17657-1999, 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 present invention 1～5.
The present invention carries out deep processing by the high density oriented wood chipboard obtained, 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 by the boxboard obtained, and result is as shown in table 2, the performance test results of the boxboard that table 2 obtains for the embodiment of the present invention 1～5.
It is that 110mm, width are the wood shavings that 15mm and thickness are 0.45mm that length is provided, and according to the mass ratio of wood shavings and adhesive, is that 100:18 is sprayed at adhesive on the surface of wood shavings, completes 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 obtained is carried out to hot repressing after 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 by the high density oriented wood chipboard obtained, density is measured according to the method for 4.2 records in GB GB/T17657-1999, moisture content is measured according to the method for 4.3 records in GB GB/T17657-1999 " 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 in GB/T17657-1999 " 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 in GB GB/T17657-1999, MOR and elastic modelling quantity are measured according to the method for 4.9 records in GB GB/T17657-1999, 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 present invention 1～5.
The present invention carries out deep processing by the high density oriented wood chipboard obtained, 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 by the boxboard obtained, and result is as shown in table 2, the performance test results of the boxboard that table 2 obtains for the embodiment of the present invention 1～5.
It is that 125mm, width are the wood shavings that 25mm and thickness are 0.55mm that length is provided, and according to the mass ratio of wood shavings and adhesive, is that 100:18 is sprayed at adhesive on the surface of wood shavings, completes 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 obtained is carried out to hot repressing after 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 by the high density oriented wood chipboard obtained, density is measured according to the method for 4.2 records in GB GB/T17657-1999, moisture content is measured according to the method for 4.3 records in GB GB/T17657-1999 " 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 in GB/T17657-1999 " 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 in GB GB/T17657-1999, MOR and elastic modelling quantity are measured according to the method for 4.9 records in GB GB/T17657-1999, 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 present invention 1～5.
The present invention carries out deep processing by the high density oriented wood chipboard obtained, 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 by the boxboard obtained, and result is as shown in table 2, the performance test results of the boxboard that table 2 obtains for the embodiment of the present invention 1～5.
Embodiment 4
It is that 100mm, width are the wood shavings that 10mm and thickness are 0.4mm that length is provided, and according to the mass ratio of wood shavings and adhesive, is that 100:18 is sprayed at adhesive on the surface of wood shavings, completes 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 obtained is carried out to hot repressing after 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 by the high density oriented wood chipboard obtained, density is measured according to the method for 4.2 records in GB GB/T17657-1999, moisture content is measured according to the method for 4.3 records in GB GB/T17657-1999 " 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 in GB/T17657-1999 " 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 in GB GB/T17657-1999, MOR and elastic modelling quantity are measured according to the method for 4.9 records in GB GB/T17657-1999, 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 present invention 1～5.
The present invention carries out deep processing by the high density oriented wood chipboard obtained, 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 by the boxboard obtained, and result is as shown in table 2, the performance test results of the boxboard that table 2 obtains for the embodiment of the present invention 1～5.
Embodiment 5
It is that 130mm, width are the wood shavings that 30mm and thickness are 0.6mm that length is provided, and according to the mass ratio of wood shavings and adhesive, is that 100:18 is sprayed at adhesive on the surface of wood shavings, completes 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 obtained is carried out to hot repressing after 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 by the high density oriented wood chipboard obtained, density is measured according to the method for 4.2 records in GB GB/T17657-1999, moisture content is measured according to the method for 4.3 records in GB GB/T17657-1999 " 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 in GB/T17657-1999 " 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 in GB GB/T17657-1999, MOR and elastic modelling quantity are measured according to the method for 4.9 records in GB GB/T17657-1999, 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 present invention 1～5.
The present invention carries out deep processing by the high density oriented wood chipboard obtained, 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 by the boxboard obtained, and result is as shown in table 2, the performance test results of the boxboard that table 2 obtains for the embodiment of the present invention 1～5.
The performance test results of the high density oriented wood chipboard that table 1 embodiment of the present 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 over 2.0T, is beneficial to its application.
The performance test results of the boxboard that table 2 embodiment of the present 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 over 7.26T, there is higher using value.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles 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 (14)
1. a high density oriented wood chipboard, is characterized in that, its density is more than or equal to 0.8 g/cm
3, described high density oriented wood chipboard obtains by laminating hot pressing, is about to the slab cutting, and the plate blank layer then cutting completed stacks to be placed on the laminating hot pressing machine carries out the hot pressing acquisition, and the air-dry density of the wood shavings of described high density oriented wood chipboard is greater than 0.5 g/cm
3the length of described wood shavings is 100 mm ~ 130 mm, width is 20 mm ~ 30 mm, thickness is 0.6 mm ~ 0.8 mm, the mass ratio of described wood shavings and adhesive is 100:(10 ~ 25), the mass ratio of described adhesive and water is (39～48): (61～52), the temperature of described laminating hot pressing is more than or equal to 120 ℃ and is less than or equal to 145 ℃, the pressure of described laminating hot pressing is 3.1 MPa～3.7Mpa, the ratio range of the thickness of the time of described laminating hot pressing and described high density oriented wood chipboard is 80 ~ 120, and 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 1150 s ~ 1700s.
3. 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%.
4. high density oriented wood chipboard according to claim 1, it is characterized in that, comprise the layer of mating formation, under mat formation layer and the centre layer of mating formation, mat formation on described layer and described under the layer of mating formation be the layer of vertically mating formation, mat formation and layer comprise at least one layer of laterally mating formation in described centre.
5. high density oriented wood chipboard according to claim 4, it is characterized in that, Central Symmetry with the described high density oriented wood chipboard setting of described vertically mat formation layer and the described layer of laterally mating formation, and described quantity of vertically mating formation layer is more than or equal to the quantity of the described layer of laterally mating formation.
6. the processing method of a high density oriented wood chipboard comprises the following steps:
Wood shavings are mixed with adhesive, obtain the glue mixing wood shavings, the air-dry density of described wood shavings is greater than 0.5 g/cm
3, the length of described wood shavings is 100 mm ~ 130 mm, and width is 20 mm ~ 30 mm, and thickness is 0.6 mm ~ 0.8 mm, the mass ratio of described wood shavings and adhesive is 100:(10 ~ 25), the mass ratio of described adhesive and water is (39～48): (61～52);
Utilize spreading head to be mated formation to described glue mixing wood shavings, obtain slab;
The plate blank layer that described slab is cut and cutting is completed stacks to be placed on the laminating hot pressing machine carries out hot pressing, obtain the high density oriented wood chipboard, the temperature of laminating hot pressing is more than or equal to 145 ℃ and is less than or equal to 160 ℃, the pressure of described laminating hot pressing is 3.1 MPa～3.7MPa, the ratio range of the thickness of the time of described laminating hot pressing and described high density oriented wood chipboard is 80 ~ 120, and described ratio is in s/mm.
7. the processing method of high density oriented wood chipboard according to claim 6, is characterized in that, the time of described laminating hot pressing is 1150 s ~ 1700s.
8. the processing method of high density oriented wood chipboard according to claim 6, is characterized in that, the moisture content of described wood shavings is 4% ~ 8%.
9. the processing method of high density oriented wood chipboard according to claim 6, 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.
10. the processing method of high density oriented wood chipboard according to claim 9, 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.
11. the boxboard based on the high density oriented wood chipboard, it is characterized in that, comprise at least one boxboard unit based on the high density oriented wood chipboard, the described boxboard unit based on the high density oriented wood chipboard comprises panel, central layer and base plate, and described central layer is the described high density oriented wood chipboard of claim 1 to 5 any one.
12. the boxboard based on the high density oriented wood chipboard according to claim 11, is characterized in that, described panel and described base plate have identical structure.
13. the boxboard based on the high density oriented wood chipboard according to claim 12, 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.
14. the method for the boxboard of a processing based on the high density oriented wood chipboard comprises the following steps:
Process high density oriented wood chipboard as described as claim 1 to 5 any one;
Stack successively the another one in the one in base plate and panel, described high density oriented wood chipboard and described base plate and described panel;
Hot pressing, obtain 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 |
| CN103878836B (en) * | 2014-04-02 | 2016-11-09 | 湖北益嘉林业发展有限公司 | A kind of solid wood multi-layer structural slab production technology |
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