CN107984592A - The manufacture method and stalk-shaving board of stalk-shaving board - Google Patents
The manufacture method and stalk-shaving board of stalk-shaving board Download PDFInfo
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- CN107984592A CN107984592A CN201711210422.1A CN201711210422A CN107984592A CN 107984592 A CN107984592 A CN 107984592A CN 201711210422 A CN201711210422 A CN 201711210422A CN 107984592 A CN107984592 A CN 107984592A
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- shaving board
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/10—Moulding of mats
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Abstract
The present invention provides a kind of manufacture method of stalk-shaving board, include the following steps：The preparation of stalk wood shavings, the screening of stalk wood shavings, the preparation of wooden shavings, the screening of wooden shavings, the processing of the thick material of timber, preparation, the preparation of core layer material and the preparation of stalk-shaving board of top layer material.In the screening step of wooden shavings, the wooden shavings is delivered to the second screening installation, by wooden shavings screening be the thick material of timber, timber qualification is expected and timber fines.In the preparation process of top layer material, top layer material is prepared with the mixture of the qualified material of the stalk and the timber fines.Present invention also offers a kind of stalk-shaving board manufactured by the manufacture method.
Description
Technical field
The present invention relates to particieboard manufacturing field, and in particular to a kind of stalk-shaving board of stalk and wooden shavings mixing
Manufacture method and the stalk-shaving board produced by this manufacture method.
Background technology
At present, particieboard manufacture in China's is still based on wood raw material.Cut down in country's implementation wildwood protected project, timber limit
Afterwards, many particieboard manufacturing enterprises are absorbed in the predicament of timber resource shortage.
Agricultural crop straw is a kind of valuable renewable resource, and the annual agricultural crop straw yield in China is at 700,000,000 tons or so.
But due to being influenced by factors such as consumption idea and life styles, for a long time, the stalk resource in China be in high consumption,
High pollution, the situation of low output, considerable a part of agricultural crop straw are thrown aside or are burned, and do not obtain reasonably exploitation profit
With.The research comprehensively utilized in recent years to agricultural crop straw (agricultural crop straw such as rice, wheat, soybean, cotton, flax) is increasingly
It is taken seriously, is one of important research direction by plate is pressed into after the industrial treatment of stalk progress a series of complex.
However, traditional stalk-shaving board production line there are problems that, for example, the particieboard produced only includes stalk
Wood shavings, can not meet the national standard of particieboard.Beating crusher hammers the broad particle distribution of broken stalk wood shavings into shape, does not meet stalk plane
The requirement different to fibre fineness of card watch core layer.In some traditional production lines, even if watch core layer each crushes, still can
There are some thick material to appear on plate surface, so as to influence the facing application of plate；Meanwhile phase may be included again inside sandwich layer
When more thick material, the intensity of stalk-shaving board produced is influenced；Or considerable fines is included inside sandwich layer again, and mistake
More fineves can largely consume adhesive.Furthermore it is possible to the quality that top layer is expected is improved by reducing the method for mesh size,
But tiny sieve can increase crushing difficulty again, especially, in the case where the moisture content of stalk cannot be guaranteed, easily lead
Low output is caused, equipment fault takes place frequently, and seriously constrains the production capacity of stalk stalk-shaving board production line.
Therefore, it is necessary to propose a kind of manufacture method of new stalk-shaving board and stalk-shaving board, it is above-mentioned to solve
Problem.
The content of the invention
In order to solve the above-mentioned technical problem at least one aspect in, the embodiment provides a kind of stalk wood shavings
The manufacture method of plate and the stalk-shaving board manufactured in this way.
According to an aspect of the present invention, there is provided a kind of manufacture method of stalk-shaving board, the manufacture method are included such as
Lower step：
The preparation of stalk wood shavings：By straw cutting, drying and crushing, stalk wood shavings are made；
The screening of stalk wood shavings：The stalk wood shavings are delivered to the first screening installation, the stalk wood shavings are sieved
For the thick material of stalk and the qualified material of stalk；
The preparation of wooden shavings：By woodchip and flaking, wooden shavings is made；
The screening of wooden shavings：The wooden shavings is delivered to the second screening installation, the wooden shavings is sieved
For the thick material of timber, the qualified material of timber and timber fines；
The processing of the thick material of timber：Using thinning apparatus, the thick material of the timber is refined, and by the wood after refinement
The thick material of material and the wooden shavings are delivered to second screening installation together, by the thick material of the timber after refinement into
The screening of one step is the thick material of timber, timber qualification is expected and timber fines；
The preparation of top layer material：Top layer material is prepared with the mixture of the qualified material of the stalk and the timber fines；
The preparation of core layer material：Core layer material is prepared with the timber qualification material；And
The preparation of stalk-shaving board：Using top layer material and the core layer material, by mating formation, precompressed, hot pressing and rear place
Step is managed, the stalk-shaving board is made.
Alternatively, the mixture with the qualified material of the stalk and the timber fines prepares top layer material and includes：
The qualified material of the stalk and the timber fines are delivered to the first pneumatic separation equipment to carry out pneumatic separation；With
The qualified material of the stalk by pneumatic separation and the mixture of the timber fines are glued, institute is made
Top layer material is stated,
And/or described core layer material is prepared with the timber qualification material include：
The qualified material of the timber is delivered to the second pneumatic separation equipment to carry out pneumatic separation；With
The qualified material of the timber by pneumatic separation is glued, the core layer material is made.
Alternatively, first screening installation includes first party hole sizer, and the first party hole sizer sieves the stalk wood shavings
It is divided into the thick material of stalk and the qualified material of stalk.
For example, the mesh size of the first party hole sizer is in the range of 1.3mm × 1.3mm~2.8mm × 2.8mm.
Alternatively, second screening installation includes：Second party hole sizer or strip-type screen；And third party's hole sizer, wherein, institute
It is together the thick material of timber, timber by wooden shavings screening to state second party hole sizer or strip-type screen and third party's hole sizer
Qualification material and timber fines.
For example, the mesh size of the second party hole sizer is in the range of 8mm × 8mm~12mm × 12mm, the bar shaped
The mesh size of sieve in the range of 3mm × 30mm~4mm × 40mm, the mesh size of third party's hole sizer 0.15mm ×
In the range of 0.15mm~0.3mm × 0.3mm.
For example, in step is glued, the adhesive of application includes isocyanate glue.
Alternatively, it is glued to the qualified material of the stalk by pneumatic separation and the mixture of the timber fines
In the step of the top layer material is made, the applied amount of isocyanate glue is the qualified material of the stalk to be glued and the timber
The 3.5~5.0% of the weight of the mixture of fines；
And/or be glued the qualified material of the timber by pneumatic separation the core layer material is made the step of
In, the applied amount of isocyanate glue is the 2.5~3.0% of the weight of the qualified material of timber to be glued.
Alternatively, the manufacture method further includes following steps：
The processing of the thick material of stalk：Using another thinning apparatus, the thick material of the stalk is refined, and by the institute after refinement
State the thick material of stalk and the stalk wood shavings are delivered to first screening installation together, the stalk after refinement is thick
Further screening is the thick material of stalk and the qualified material of stalk to material.
Alternatively, the preparation process of the stalk-shaving board includes：
Top layer material is divided into upper table layered material and following table layered material；
Mat formation successively the following table layered material, the core layer material and the upper table layered material, slab is made；
Slab described in precompressed；And
Slab described in hot pressing.
Alternatively, the manufacture method further includes：It is dry before the wooden shavings is delivered to the second screening installation
The wooden shavings.
For example, the stalk is included in rice straw, wheat stalk, soybean stalk, cotton stalk and crudefiber crop stalk extremely
Few one kind.
According to another aspect of the present invention, a kind of stalk-shaving board is also provided, the stalk-shaving board is according to above-mentioned
The stalk-shaving board that one manufacture method produces.
According to another aspect of the invention, a kind of stalk-shaving board is also provided, the stalk-shaving board includes：
Upper epidermis, the upper epidermis include stalk wood shavings, timber fines and isocyanate glue；
Sandwich layer, the sandwich layer include wooden shavings and isocyanate glue；With
Layer, the layer include stalk wood shavings, timber fines and isocyanate glue.
Compared with prior art, the invention has the advantages that in it is at least one：
(1) wooden shavings is screened, the timber fines filtered out is expected for top layer, it is possible to increase the straw produced
The surface hardness and/or toughness of stalk particieboard, occur decorative paper cracking, the risk of plate chipping when reducing panel overlay；
(2) wooden shavings is screened, the timber fines filtered out is expected for top layer, that is, avoids timber fines work
For core layer material, so as to avoid excessive fines from largely consuming adhesive, reduce the applied amount of adhesive when preparing sandwich layer；
(3) the stalk wood shavings after crushing are screened, the qualified material of the stalk only filtered out can be used in top layer material, energy
Enough prevent thick material from appearing on plate surface, so as to improve the facing application of plate；
(4) wooden shavings is screened, the qualified material of the timber only filtered out can be used in core layer material, can prevent
More thick material includes in the core, and the intensity of the particieboard so as to ensure to produce meets the requirement of national standard；
(5) broken process, the thick material of timber can be become the qualified material of timber by broken process again, improve timber original again for increase
The utilization rate of material.
Brief description of the drawings
By the description made for the present invention of below with reference to attached drawing, other objects and advantages of the present invention will be aobvious and easy
See, and can help that complete understanding of the invention will be obtained.
Fig. 1 is the process flow chart according to the manufacture method of the stalk-shaving board of exemplary embodiment of the present；And
Fig. 2 is the structure diagram of the stalk-shaving board produced according to the manufacture method of one embodiment of the present of invention.
It should be noted that attached drawing is not necessarily to scale to draw, but only not influence the schematic of reader's understanding
Mode is shown.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the attached drawing of the embodiment of the present invention,
Technical scheme is clearly and completely described.Obviously, described embodiment is the implementation of the present invention
Example, instead of all the embodiments.Based on described the embodiment of the present invention, those of ordinary skill in the art are without creating
Property work on the premise of all other embodiments obtained, belong to the scope of protection of the invention.
Unless otherwise defined, the technical term or scientific terminology that the present invention uses should be tool in fields of the present invention
The ordinary meaning that the personage for having general technical ability is understood.
Herein, statement " particieboard " refers to timber or non-wood plant fibre Raw material processing is (or broken into wood shavings
Material), apply adhesive (and/or other additives), a kind of wood-based plate that assembly is molded and is formed through hot pressing.
Statement " stalk " be ripe crops cauline leaf (fringe) part general name, for example, can include wheat, rice, corn,
The remainder of potato, rape, cotton, sugarcane and other crops (being usually coarse food grain) after seed is harvested.For example, herein
In, the stalk can include at least one of rice straw, wheat stalk, soybean stalk, cotton stalk and crudefiber crop stalk.
For another example the crudefiber crop stalk can include Chinese fiber crops stalk, flax stalk, hemp stalk etc..
Statement " wood shavings " refers to timber or the machined piece with certain form and size formed of non-wood material
Shape, strip, bar-shaped and/or graininess particle.
Statement " coarse fodder " or " thick material ", " qualification material ", " fines " mainly draw wood shavings according to the size of wood shavings
Point, it will be understood by those skilled in the art that they represent be Flake geometry relative size, i.e. " coarse fodder " or " thick material "
Flake geometry is larger, and the Flake geometry of " qualification material " is placed in the middle, and the Flake geometry of " fines " is smaller.According to practical use or applied field
The difference of conjunction, division " coarse fodder " or " thick material ", " qualification material ", " fines " Flake geometry can be different.For example, it is used for wood shavings
" coarse fodder " on the top layer of plate or " thick material ", " qualification material ", the Flake geometry of " fines " are respectively at the sandwich layer for particieboard
" coarse fodder " or " thick material ", " qualification material ", the Flake geometry of " fines " are different.
An exemplary embodiment according to the present invention, there is provided a kind of manufacture method of stalk-shaving board, the manufacture method
It may include steps of：
The preparation of stalk wood shavings：By straw cutting, drying and crushing, stalk wood shavings are made；
The screening of stalk wood shavings：The stalk wood shavings are delivered to the first screening installation, the stalk wood shavings are sieved
For the thick material of stalk and the qualified material of stalk；
The preparation of wooden shavings：By woodchip and flaking, wooden shavings is made；
The screening of wooden shavings：The wooden shavings is delivered to the second screening installation, the wooden shavings is sieved
For the thick material of timber, the qualified material of timber and timber fines；
The processing of the thick material of timber：Using disintegrating apparatus, then the broken thick material of the timber, and will be broken again after the wood
The thick material of material and the wooden shavings are delivered to second screening installation together, will be broken again after the thick material of the timber into
The screening of one step is the thick material of timber, timber qualification is expected and timber fines；
The preparation of top layer material：Top layer material is prepared with the mixture of the qualified material of the stalk and the timber fines；
The preparation of core layer material：Core layer material is prepared with the timber qualification material；And
The preparation of stalk-shaving board：Using top layer material and the core layer material, by mating formation, precompressed, hot pressing and rear place
Step is managed, the stalk-shaving board is made.
Since the plasticity of timber is better than the plasticity of stalk, stalk enbrittles, so, in above-mentioned manufacture method,
By the way that the timber screened out fines is increased in the top layer of stalk-shaving board, the table of the stalk-shaving board produced can be improved
Surface intensity, increases the table bond strength and elasticity modulus (MOE) on the top layer of stalk-shaving board.
That is, above-mentioned manufacture method have the advantages that in it is at least one：
(1) wooden shavings is screened, the timber fines filtered out is expected for top layer, it is possible to increase the straw produced
The surface hardness and/or toughness of stalk particieboard, occur decorative paper cracking, the risk of plate chipping when reducing panel overlay；
(2) wooden shavings is screened, the timber fines filtered out is expected for top layer, that is, avoids timber fines work
For core layer material, so as to avoid excessive fines from largely consuming adhesive, reduce the applied amount of adhesive when preparing sandwich layer；
(3) the stalk wood shavings after crushing are screened, the qualified material of the stalk only filtered out can be used in top layer material, energy
Enough prevent thick material from appearing on plate surface, so as to improve the facing application of plate；
(4) wooden shavings is screened, the qualified material of the timber only filtered out can be used in core layer material, can prevent
More thick material includes in the core, and the intensity of the particieboard so as to ensure to produce meets the requirement of national standard；
(5) broken process, the thick material of timber can be become the qualified material of timber by broken process again, improve timber original again for increase
The utilization rate of material.
With reference to Fig. 1, the manufacture method of stalk-shaving board according to embodiments of the present invention is described in further detail.
In manufacture method according to embodiments of the present invention, the preparation process of stalk wood shavings can specifically include following step
Suddenly：
Straw cutting：Stalk is opened into bundle, Bales Off, with chaffcutter by straw cutting into certain length, for example, it is cut into 5~
The length of 50mm.
It is dry：Stone, ash content, the moisture in stalk are removed with cylindrical drier, makes the water content control of stalk 9%
~11%.Cylindrical drier is a kind of interior heat transfer type tumble dried equipment, and wet stock is obtained to lead on cylinder outer wall
The heat of hot mode transmission, removes moisture, reaches dry required water content.
Crush：Stalk is processed into particle with beater grinder.
In manufacture method according to embodiments of the present invention, the preparation process of wooden shavings can specifically include following step
Suddenly：
Woodchip：Timber is sized to the wood chip with shape with wood chipping equipment.
Flaking：Wood chip is processed into the size and dimension of needs by chipper.
It is dry：The moisture content for making wood shavings with drying machine reaches technological requirement.
According to exemplary embodiment, after the stalk wood shavings are made, the manufacture method further includes screening step.
In screening step, the stalk wood shavings are delivered to the first screening installation, stalk wood shavings screening is thick for stalk
Material and the qualified material of stalk.In one example, first screening installation can include first party hole sizer, the first party hole sizer
It is the thick material of stalk and the qualified material of stalk by stalk wood shavings screening.For example, the mesh size of the first party hole sizer exists
In the range of 1.3mm × 1.3mm~2.8mm × 2.8mm.For another example the mesh size of the first party hole sizer can be 2mm ×
2mm.In this way, by the first party hole sizer, the qualified material of stalk can be used as by the stalk wood shavings of the first party hole sizer, not
It can be used as the thick material of stalk by the stalk wood shavings of the first party hole sizer.First party hole sizer mesh size for 2mm ×
In the example of 2mm, stalk wood shavings of the Flake geometry less than 2mm × 2mm can be used as the qualified material of stalk, remaining stalk wood shavings can
To be used as the thick material of stalk.
According to exemplary embodiment, the manufacture method further includes the processing step of the thick material of stalk.In the stalk
In the processing step of thick material, using grinding apparatus, the thick material of the stalk of polishing, and the stalk after polishing is thick
Material and the stalk wood shavings are delivered to first screening installation together, and the thick material of the stalk after polishing is further sieved
It is divided into the thick material of stalk and the qualified material of stalk.In one example, the grinding apparatus can be sieve ring type sander, for example,
BX5612 types sieve ring type sander, and the thick material of stalk is polished into thinner wood shavings.
According to exemplary embodiment, after the wooden shavings is made, the manufacture method further includes screening step.
In screening step, the wooden shavings is delivered to the second screening installation, with the wooden shavings screening for the thick material of timber,
The qualified material of timber and timber fines.In one example, second screening installation can include second party hole sizer or strip-type screen；
And third party's hole sizer, wherein, the second party hole sizer or strip-type screen and third party's hole sizer are together by the wood planing
Flower screening is the thick material of timber, timber qualification is expected and timber fines.For example, the mesh size of the second party hole sizer can be
In the range of 8mm × 8mm~12mm × 12mm, the mesh size of the strip-type screen can be 3mm × 30mm~4mm × 40mm's
In the range of.For another example the mesh size of the second party hole sizer can be 10mm × 10mm.For example, third party's hole sizer
Mesh size can be in the range of 0.15mm × 0.15mm~0.3mm × 0.3mm.For another example the sieve of third party's hole sizer
Screen distance can be 0.2mm × 0.2mm.In the examples described above, wooden shavings of the Flake geometry less than 0.2mm × 0.2mm can be with
As timber fines, Flake geometry can be used as the qualified material of timber in the wooden shavings of 0.2mm × 0.2mm~10mm × 10mm,
Remaining wooden shavings can be used as the thick material of timber.
According to exemplary embodiment, the manufacture method further includes the processing step of the thick material of timber.In the timber
In the processing step of thick material, using disintegrating apparatus, then the broken thick material of the timber, and will be broken again after the timber it is thick
Material and the wooden shavings are delivered to second screening installation together, will be broken again after the thick material of the timber further sieve
It is divided into the thick material of timber and the qualified material of timber.In one example, the disintegrating apparatus can be pulverizer, and timber is thick
Feed powder is broken into thinner wood shavings.
According to exemplary embodiment, with reference to shown in Fig. 1, the manufacture method can also include pneumatic separation step and apply
Glue step, to prepare top layer material., can be defeated by the qualified material of the stalk and the timber fines in the pneumatic separation step
Send to the first pneumatic separation equipment to carry out pneumatic separation.In one example, first pneumatic separation equipment can include
Airflow separator.In the sizing step, the stalk qualification by pneumatic separation is expected mixed with the timber fines
Close material to be glued, expected so that the top layer is made.
According to exemplary embodiment, the manufacture method can also include pneumatic separation step and sizing step, with system
Standby core layer material.In the pneumatic separation step, the qualified material of the timber can be delivered to the second pneumatic separation equipment with into
Promoting the circulation of qi classification.In one example, second pneumatic separation equipment can include airflow separator.In the sizing step
In, the qualified material of the timber by pneumatic separation is glued, the core layer material is made.
According to exemplary embodiment, in above-mentioned sizing step, the adhesive of application can include isocyanate glue, example
Such as MDI isocyanate glue.
For example, the manufacture method of the stalk-shaving board can specifically comprise the following steps：
Top layer material sizing：The mixing materials quantitative of the qualified material of stalk and timber fines is inputted into top layer glue system, by default
Sizing ratio apply adhesive, the top layer wood shavings being glued.In one exemplary embodiment of the present invention, applied
Adhesive is isocyanate glue, such as MDI glue, since isocyanate glue is one kind without aldehyde glue, it is possible to ensure what is produced
The burst size of methanal of stalk-shaving board is zero.As an example, the mixture of the qualified material of stalk and timber fines can be led to
Cross belt metering transporter to be measured, by PLC control centres, complete the automatic and accurate supply of adhesive, realize that stalk closes
The adhesive that the mixture of lattice material and timber fines is thrown away in closed roller with high-speed rotating centrifugal atomizer it is uniform
Mixing.For example, the applied amount of isocyanate glue is the 3.5 of the weight of the mixture of the qualified material of stalk to be glued and timber fines
~5.0%.
Sub-material：By the mixture of the qualified material of the stalk being uniformly glued and timber fines with tripper be divided into upper table layered material and
Following table layered material.
Core layer material is glued：By the qualified material input sandwich layer glue system sizing of the timber., can be by institute as an example
State the qualified material of timber to be measured by belt metering transporter, by PLC control centres, the automatic and accurate for completing adhesive supplies
Give, realize uniformly mixing for the adhesive that the qualified material of timber is thrown away in closed roller with high-speed rotating centrifugal atomizer.
The adhesive can also be isocyanate glue, such as MDI glue, for example, the applied amount of isocyanate glue can be waited to be glued
The 2.5~3.0% of the weight of the qualified material of timber.An example according to the present invention, if the resin added of the core layer material accounted for
The weight percent of core layer material is denoted as A, and the percentage by weight that the resin added that the top layer is expected is accounted for top layer material is denoted as B, then A can be with
Smaller than B by 0.5~1, i.e., the value of (B-A) is located in the range of 0.5~1.
Mat formation：Spreading machine successively using the mixture (as following table layered material) of the qualified material of the stalk after sizing and timber fines,
The mixture of stalk qualified material and timber fines of the qualified material of timber (as core layer material), after sizing after sizing is (as upper table
Layered material) mat formation into the slab of three layers of symmetrical structure.
Precompressed：Slab makes slab keep certain shape by preformer precompressed.Slab precompressed rate control is
45%, rebound degree 20%.Haftplatte in order to prevent, pressing plate, pad surfaces periodically should equably smear remover.
Hot pressing：Slab is heated by press, pressurizes, and the isocyanates of the water in plate raw material and adhesive is produced complexity
Plate raw material is bonded together by chemical reaction, the product of reaction.Pressing plate haftplatte in order to prevent, top board layer, which should apply, to be spread
Even remover.
Post processing：The hair plates of compacting is subjected to buck, cutting edge, cools down the postprocessing working procedures such as homogeneous, sanding, stalk is made
Particieboard.
Further, the whole stream using above-mentioned manufacture method manufacture stalk-shaving board is described with reference to specific example
Journey.
(1) rice straw is cut into the careless section of 20~40mm using chaffcutter.
(2) the careless section evenly drying is made by the careless section using the drum-type pneumatic drier with exclusion device
Moisture content is down to 12~13%, while removes the debris such as stone therein, soil, iron block, to prevent debris from entering next step
Pulverizing process.
Wherein, drying system can directly use air, and heat exchanger uses shell-and-tube heat exchanger, and exhaust emissions and circulation make
It is 1 with ratio：1, the air themperature into drying machine is 180 DEG C, and drying machine sieve uses 25mm square-hole screens, air delivery pipe
Wind speed is 20m/s, handles tail gas using primary cyclone, tail gas discharge uses bag filter.
(3) the careless section is crushed using 2 × 132kw twin shafts beater grinder.
(4) mesh size is used for the square hole screen of 2mm × 2mm the stalk wood shavings after the crushing to be sieved into stalk thick
Material and the qualified material of stalk.
(5) using BX5612 types sieve ring type sander, the thick material of the stalk of polishing, and by the stalk after polishing
Thick material and the stalk wood shavings are delivered to the square hole screen of the 2mm × 2mm together, by the thick material of the stalk after polishing
Further screening is the thick material of stalk and the qualified material of stalk.
(6) wood chipping equipment and chipper are utilized, is chipped to timber and flaking, wooden shavings is made.
(7) it is 0.2mm the wooden shavings to be delivered to square hole screen that mesh size is 10mm × 10mm and mesh size
The square hole screen of × 0.2mm, by wooden shavings screening be the thick material of timber, timber qualification is expected and timber fines.
(8) utilize pulverizer, then the broken thick material of the timber, and will be broken again after the thick material of the timber and the wood
Material wood shavings are delivered to the square hole screen that the mesh size is 10mm × 10mm together, will be broken again after the thick material of the timber into
The screening of one step is the thick material of timber and the qualified material of stalk.
(9) the qualified material of the stalk and timber fines are delivered to airflow separator to carry out pneumatic separation.
(10) the qualified material of the timber is delivered to airflow separator to carry out pneumatic separation.
(11) the mixing materials quantitative of the qualified material of stalk and timber fines is inputted into top layer glue system, the adhesive applied
For MDI glue, the applied amount of MDI glue is the 4% of the weight of the mixture of the qualified material of stalk to be glued and timber fines.
(12) sub-material：The mixture of the qualified material of the stalk being uniformly glued and timber fines is divided into upper epidermis with tripper
Material and following table layered material.
(13) by the qualified material input sandwich layer glue system sizing of the timber.The adhesive applied is MDI glue, MDI glue
Applied amount be the qualified material of timber to be glued weight 3.0%.
(14) mat formation：Spreading machine is successively using the mixture of the qualified material of the stalk after sizing and timber fines (as layer
Material), the mixture of stalk qualified material and timber fines of the qualified material of timber after sizing (as core layer material), after sizing (as
Upper table layered material) mat formation into the slab of three layers of symmetrical structure.
(15) precompressed：Slab makes slab keep certain shape by preformer precompressed.Slab precompressed rate control is
45%, rebound degree 20%.
(16) hot pressing：Slab is heated by press, pressurizes, and produces the isocyanates of the water in plate raw material and adhesive multiple
Plate raw material is bonded together by miscellaneous chemical reaction, the product of reaction.
(17) post-process：The hair plates of compacting is subjected to buck, cutting edge, cools down the postprocessing working procedures such as homogeneous, sanding, to be made
Stalk-shaving board.
According to particieboard standard GB/T/T4897-2015 requirements；According to GB/T 17657-2013 wood-based plates and rennerer
Foliation method for testing performance is made, it is as follows according to the property indices that the manufacture method of above-mentioned example produces：
Thickness：18mm
Density：715kg/m3
Internal bond strength：0.58MPa
Table bond strength：1.39MPa
Static bending strength：20.7MPa
Elasticity modulus：2260MPa
Supine human body：Plate face 1310N, edges of boards 850N
2h thickness swelling rates：1.96%
Burst size of methanal：Do not measure
It can be seen that by the above-mentioned physical and chemical index measured by manufacturer's legal system according to an embodiment of the invention
The every physical and chemical index for the stalk-shaving board produced meets the requirement of national standard, most of physical and chemical index (such as
Bond strength) it is much higher than national standard.Especially, since timber fines being expected for top layer, so the stalk plane produced
The table bond strength of card is higher.
Further, timber fines is added into influence in the material of top layer to the physicochemical property of stalk-shaving board in order to study,
Contrast test, part test result such as following table are completed according to the parameter in following table based on step like above：
| Embodiment | Reference examples | |
| Top layer raw material | Stalk wood shavings+timber fines | Pure stalk wood shavings |
| Sandwich layer resin added (%) | 2.8 | 3.8 |
| Thickness (mm) | 18 | 18 |
| Density (kg/m3) | 710 | 720 |
| Internal bond strength (MPa) | 0.52 | 0.47 |
| Table bond strength (MPa) | 1.49 | 1.11 |
| Static bending strength (MPa) | 17.3 | 14.8 |
| Elasticity modulus (MPa) | 2454 | 2067 |
| Plate face nail-holding ability (N) | 1132 | 985 |
| Edges of boards nail-holding ability (N) | 783 | 771 |
| 2h thickness swelling rates (%) | 2.3 | 2.8 |
According to upper table as can be seen that by the way that timber fines is added in the material of top layer, timber fines is not added in expecting with top layer
Reference examples compare, sandwich layer resin added is down to 2.8% from 3.8%, and the reduction of resin added do not reduce made from stalk
The physical and chemical index of particieboard.That is, by the way that timber fines is added in the material of top layer, can be in stalk made from guarantee
The physical and chemical index of particieboard meets the resin added that sandwich layer is greatly reduced on the premise of the requirement of national standard, so as to reduce
Product cost, improves the competitiveness of product.
Exemplary embodiment according to the present invention, there is provided a kind of stalk-shaving board, as shown in Fig. 2, the stalk-shaving board
It can include：Upper epidermis 21, the upper epidermis include stalk wood shavings, timber fines and isocyanate glue；Sandwich layer 22, the sandwich layer
Include wooden shavings and isocyanate glue；With layer 23, the layer includes stalk wood shavings, timber fines and isocyanates
Glue.The stalk-shaving board can be according to shown in Fig. 1 embodiment the stalk-shaving board that produces of manufacture method.
In one example, the Flake geometry of the stalk wood shavings can be less than 2mm × 2mm, and the timber fines can be with
It is less than the wooden shavings of 0.2mm × 0.2mm for Flake geometry, the Flake geometry of the wooden shavings can be in 0.2mm × 0.2mm
In the range of~10mm × 10mm.
For the embodiment of the present invention, it is also necessary to explanation, in the case where there is no conflict, the embodiment of the present invention and reality
Applying the feature in example can be mutually combined to obtain new embodiment.
More than, it is only embodiment of the invention, but protection scope of the present invention is not limited thereto, and it is of the invention
Protection domain should be subject to scope of the claims.
Claims (14)
1. a kind of manufacture method of stalk-shaving board, it is characterised in that include the following steps：
The preparation of stalk wood shavings：By straw cutting, drying and crushing, stalk wood shavings are made；
The screening of stalk wood shavings：The stalk wood shavings are delivered to the first screening installation, the stalk wood shavings are sieved as straw
The thick material of stalk and the qualified material of stalk；
The preparation of wooden shavings：By woodchip and flaking, wooden shavings is made；
The screening of wooden shavings：The wooden shavings is delivered to the second screening installation, is wood by wooden shavings screening
The qualified material of the thick material of material, timber and timber fines；
The processing of the thick material of timber：Using thinning apparatus, the thick material of the timber is refined, and the timber after refinement is thick
Aniseed and the wooden shavings are delivered to second screening installation together, and the thick material of the timber after refinement is further
Sieve as the thick material of timber, the qualified material of timber and timber fines；
The preparation of top layer material：Top layer material is prepared with the mixture of the qualified material of the stalk and the timber fines；
The preparation of core layer material：Core layer material is prepared with the timber qualification material；And
The preparation of stalk-shaving board：Using the top layer material and the core layer material, by mating formation, precompressed, hot pressing and post processing step
Suddenly, the stalk-shaving board is made.
2. the manufacture method of stalk-shaving board according to claim 1, it is characterised in that described to expect so that the stalk is qualified
Preparing top layer material with the mixture of the timber fines includes：
The qualified material of the stalk and the timber fines are delivered to the first pneumatic separation equipment to carry out pneumatic separation；With
The qualified material of the stalk by pneumatic separation and the mixture of the timber fines are glued, the table is made
Layered material,
And/or described core layer material is prepared with the timber qualification material include：
The qualified material of the timber is delivered to the second pneumatic separation equipment to carry out pneumatic separation；With
The qualified material of the timber by pneumatic separation is glued, the core layer material is made.
3. the manufacture method of stalk-shaving board according to claim 1 or 2, it is characterised in that first screening installation
Including first party hole sizer, stalk wood shavings screening is the thick material of stalk and the qualified material of stalk by the first party hole sizer.
4. the manufacture method of stalk-shaving board according to claim 3, it is characterised in that the sieve of the first party hole sizer
Aperture is in the range of 1.3mm × 1.3mm~2.8mm × 2.8mm.
5. the manufacture method of the stalk-shaving board according to any one of claim 1-4, it is characterised in that second sieve
Optional equipment includes：Second party hole sizer or strip-type screen；And third party's hole sizer, wherein, the second party hole sizer or strip-type screen and
Wooden shavings screening is together the thick material of timber by third party's hole sizer, timber qualification is expected and timber fines.
6. the manufacture method of stalk-shaving board according to claim 5, it is characterised in that the sieve of the second party hole sizer
Aperture is in the range of 8mm × 8mm~12mm × 12mm, and the mesh size of the strip-type screen is in 3mm × 30mm~4mm × 40mm
In the range of, the mesh size of third party's hole sizer is in the range of 0.15mm × 0.15mm~0.3mm × 0.3mm.
7. the manufacture method of stalk-shaving board according to claim 3, it is characterised in that in step is glued, application
Adhesive includes isocyanate glue.
8. the manufacture method of stalk-shaving board according to claim 7, it is characterised in that to the institute by pneumatic separation
The mixture for stating the qualified material of stalk and the timber fines is glued to be made in the step of top layer is expected, isocyanate glue
Applied amount be the qualified material of the stalk to be glued and the timber fines mixture weight 3.5~5.0%；
And/or in the step of being glued the qualified material of the timber by pneumatic separation the core layer material is made, it is different
The applied amount of cyanic acid ester gum is the 2.5~3.0% of the weight of the qualified material of timber to be glued.
9. the manufacture method of stalk-shaving board according to claim 1, it is characterised in that the manufacture method further include as
Lower step：
The processing of the thick material of stalk：Using another equipment, the thick material of the stalk is refined, and the stalk after refinement is thick
Aniseed and the stalk wood shavings are delivered to first screening installation together, and the thick material of the stalk after refinement is further
Sieve as the thick material of stalk and the qualified material of stalk.
10. the manufacture method of stalk-shaving board according to claim 1, it is characterised in that the system of the stalk-shaving board
Standby step includes：
Top layer material is divided into upper table layered material and following table layered material；
Mat formation successively the following table layered material, the core layer material and the upper table layered material, slab is made：
Slab described in precompressed；And
Slab described in hot pressing.
11. the manufacture method of stalk-shaving board according to claim 1, it is characterised in that the manufacture method further includes：
Before the wooden shavings is delivered to the second screening installation, the dry wooden shavings.
12. the manufacture method of stalk-shaving board according to claim 1, it is characterised in that the stalk includes rice straw
At least one of stalk, wheat stalk, soybean stalk, cotton stalk and crudefiber crop stalk.
13. a kind of stalk-shaving board, it is characterised in that the stalk-shaving board is according to any one of the claims 1-12
The stalk-shaving board that the manufacture method produces.
14. a kind of stalk-shaving board, it is characterised in that the stalk-shaving board includes：
Upper epidermis, the upper epidermis include stalk wood shavings, timber fines and isocyanate glue；
Sandwich layer, the sandwich layer include wooden shavings and isocyanate glue；With
Layer, the layer include stalk wood shavings, timber fines and isocyanate glue.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711210422.1A CN107984592A (en) | 2017-11-27 | 2017-11-27 | The manufacture method and stalk-shaving board of stalk-shaving board |
| PCT/CN2018/098337 WO2019100749A1 (en) | 2017-11-27 | 2018-08-02 | Manufacturing method for straw particleboard and straw particleboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711210422.1A CN107984592A (en) | 2017-11-27 | 2017-11-27 | The manufacture method and stalk-shaving board of stalk-shaving board |
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| Publication Number | Publication Date |
|---|---|
| CN107984592A true CN107984592A (en) | 2018-05-04 |
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| CN201711210422.1A Pending CN107984592A (en) | 2017-11-27 | 2017-11-27 | The manufacture method and stalk-shaving board of stalk-shaving board |
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| WO (1) | WO2019100749A1 (en) |
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| CN109624014A (en) * | 2018-12-29 | 2019-04-16 | 湖南万华生态板业有限公司 | It is a kind of can facing multiple-layered wood chipboard production technology |
| WO2019100749A1 (en) * | 2017-11-27 | 2019-05-31 | 万华禾香板业有限责任公司 | Manufacturing method for straw particleboard and straw particleboard |
| CN110978165A (en) * | 2019-12-23 | 2020-04-10 | 万华禾香板业（公安县）有限责任公司 | Method and production line for producing board by mixing multiple raw materials |
| CN111605025A (en) * | 2020-05-28 | 2020-09-01 | 万华禾香板业(兰考)有限责任公司 | Shaving board production method and shaving board |
| CN112575916A (en) * | 2020-12-14 | 2021-03-30 | 吉林大学 | Biomass building insulation board made of hemp straws |
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| WO2019100749A1 (en) | 2019-05-31 |
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Effective date of registration: 20180727 Address after: 434300 Hubei, Jingzhou, Gongan County, Qinghai Industrial Park, east of Xingye Road, south of Minsheng Road. Applicant after: Wanhua Hexiang Board Industry Co.,Ltd. Address before: 464000 Industrial City No. fourteen, Xinyang, Henan Province, No. 19 Applicant before: WANHUA ECOBOARD (XINYANG) Co.,Ltd. |
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Application publication date: 20180504 |