CN101623893B - Manufacturing method of salix mongolica dyed hard wood - Google Patents
Manufacturing method of salix mongolica dyed hard wood Download PDFInfo
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- CN101623893B CN101623893B CN2009100698582A CN200910069858A CN101623893B CN 101623893 B CN101623893 B CN 101623893B CN 2009100698582 A CN2009100698582 A CN 2009100698582A CN 200910069858 A CN200910069858 A CN 200910069858A CN 101623893 B CN101623893 B CN 101623893B
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- salix monogolica
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- 241000124033 Salix Species 0.000 title claims abstract description 104
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 title claims abstract description 103
- 239000011121 hardwood Substances 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 238000001035 drying Methods 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000012545 processing Methods 0.000 claims abstract description 12
- 238000003825 pressing Methods 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 238000004061 bleaching Methods 0.000 claims abstract description 8
- 238000005406 washing Methods 0.000 claims abstract description 4
- 238000004043 dyeing Methods 0.000 claims description 37
- 238000005470 impregnation Methods 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 16
- 239000005011 phenolic resin Substances 0.000 claims description 9
- 229920001568 phenolic resin Polymers 0.000 claims description 9
- 238000005096 rolling process Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 7
- 239000000975 dye Substances 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 6
- 230000005021 gait Effects 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000002893 slag Substances 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 239000000047 product Substances 0.000 claims description 5
- 238000007493 shaping process Methods 0.000 claims description 4
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 3
- 238000004026 adhesive bonding Methods 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 239000003463 adsorbent Substances 0.000 claims description 3
- 239000007844 bleaching agent Substances 0.000 claims description 3
- 238000004040 coloring Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000007598 dipping method Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 238000013007 heat curing Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 239000013589 supplement Substances 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 claims 1
- 238000010030 laminating Methods 0.000 abstract 1
- 150000002989 phenols Chemical class 0.000 abstract 1
- 238000002407 reforming Methods 0.000 abstract 1
- 241000219000 Populus Species 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000003913 materials processing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention relates to a manufacturing method of salix mongolica dyed hard wood, using salix mongolica as raw material to manufacture dimensional lumber with density being 0.8-1.1 and expanding the application range thereof; the implementation process comprises the followings steps: (1) manufacturing salix mongolica strips into flat and peeled salix mongolica strands by a laminating method; (2)washing the strands with circulating water and bleaching; (3) drying the strands to water content of 20%-25%; (4) dying the strands; (5) using modified phenol gum for gumming the strands; (6) drying the strands to water content of 12%-15% after gumming; (7) using a cold pressing method to compact the compositive blank in a die with using unit pressure being 550-650kg/cm<2>; (8) causing the blank to be glued and solidified into integral salix mongolica dyed hard wood at the temperature of 140 DEG C to 145 DEG C; (9) processing and reforming the salix mongolica dyed hard wood into acceptable products with uniform specification. The invention provides a new hard wood for woodwork industry.
Description
Technical field
The present invention relates to the manufacturing field of artificial board, particularly a kind of is that material density can reach 0.8g/cm with the salix monogolica
3-1.1g/cm
3Dyeing hard wood manufacture method.
Background technology
At present; the manufacturing of artificial board is to be primary raw material with timber; by different timber recombination methods; make various sheet materials such as glued board, core-board, particieboard; the a large amount of forest reserves of annual consumption; the forest reserves scarcity of China; the hard natural timber critical shortage that density is big; implement woodworks such as " wildwood protected project " back solid wooden floor board, furniture and produce used hard wood; mainly be to solve source of goods rise in price in short supply by import, this situation will restrict the development of woodwork industry for a long time.
Salix monogolica is a desert plant, it is a kind of shrub, numerous big, the branch of its fast growth, root system is grown thickly, a cuttage can be cut down use for many years, and annual per mu yield can reach about the 3-5 ton, and the desert gross area of China is about 1,962,000,000 mu, extensively the plantation salix monogolica can provide nexhaustible raw material for wood-based panel industry, saving a large amount of forest reserves, can play preventing and fixing sand simultaneously and change the condition that sandstorm forms, is to administer controlling desert.But because the diameter of salix monogolica branch is too little, generally about the 1-3 centimetre, peeling is difficult, existing wood-based plate manufacture method, can not use as primary raw material with a large amount of salix monogolicas, good kind of situation of not selling well restricts the enthusiasm that vast desert area peasants and herdsmen plant salix monogolica.
In the patent of invention practice of implementing my application number 200710058564.0 high-strength anti-corrosion integrated materials, by contrast experiment to poplar and two kinds of materials processing hard woods of salix monogolica, proof is the hard wood that raw material is made with the salix monogolica, its performance can reach with the poplar performance of the hard wood that is the raw material making, proposes this programme after improving processing method at the salix monogolica properties of materials.
Summary of the invention
The objective of the invention is to overcome above-mentioned weak point, providing a kind of is that material density can reach 0.8g/cm with the salix monogolica
3-1.1g/cm
3The manufacture method of dyeing hard wood.
Implementation of the present invention is as follows for achieving the above object:
A kind of is raw material with the salix monogolica, and density can reach 0.8g/cm
3-1.1g/cm
3The manufacture method of dyeing hard wood, it is characterized in that concrete implementation step is as follows:
(1) preparation of salix monogolica strand:
Adopt the pulley type roller that the salix monogolica bar is rolled, salix monogolica is sent in the pulley type roller, the crust of circle shape salix monogolica bar separates with its trunk branch after rolling, and becomes flat-shaped salix monogolica strand;
(2) washing and bleaching:
Between the salix monogolica strand space after rolling, understand the existence of some onal and core marrow slag, with the water tank that high-pressure hydraulic pump is housed the salix monogolica strand is washed processing, salix monogolica strand after rolling is put into the frock basket, open water pump cycle of higher pressure water, the part onal that exists between the salix monogolica strand space and the core marrow slag of salix monogolica are rinsed well, put into Bellmer behind the trickle and bleach processing, make salix monogolica strand color basically identical, the bleaching liquid that uses is the aqueous hydrogen peroxide solution of 25%-30%, temperature is 100 ℃-110 ℃, and the time is 2-3 hour;
(3) the dry processing:
The drying equipment that adopts is a mesh dryer, the salix monogolica strand behind the impregnation is carried out drying continuously handle, and kiln temperature is 100 ℃-110 ℃, wind speed is 4-5m/s, the guipure gait of march is 3-4m/min, and be 20-30min drying time, and dried moisture content is controlled in the 20%-25% scope;
(4) dyeing of salix monogolica strand:
Adopt the colouring method of high-temperature pressurizing that the salix monogolica strand is dyeed, use equipment is the horizontal sealing load jar that has vacuum system and compression system and built-in heater, and is furnished with the heating reservoir consistent with the pressurized tank volume; At first allocate dyeing liquor in reservoir, color is made by oneself as required, and the use amount of dyestuff is for to be dyed the 2.5%-3% of salix monogolica strand weight, with water furnishing dyeing liquor, and dyeing liquor is heated in reservoir to 85 ℃-95 ℃; After the salix monogolica strand is delivered in the pressurized tank, at first being evacuated to gauge pressure is 0.08-0.085MPa, from reservoir, be evacuated to dyeing liquor in the pressurized tank then, to be dyed and be forced into 1.2-1.4MPa after the salix monogolica strand soaks fully, heat to 100 ℃-110 ℃, release after pressure-maintaining and heat-preservation 60-80 minute, after the release with the dyeing liquor pumpback to reservoir, being evacuated to gauge pressure again is that 0.08-0.085MPa kept 20-30 minute, the moisture that will be dyed in the salix monogolica bar is extracted out, does not have the dropping liquid phenomenon when making its discharging and takes place, the dyeing liquor of pumpback to the reservoir, by chemically examining its content and carrying out appropriate supplement and fill dyestuff, dyeing liquor can be recycled;
(5) impregnation:
Use water-soluble modified phenolic resins to use as the adhesive of material, the dyeing salix monogolica strand that employing will be wet is placed in the vacuum pressed jar, utilizes the density of phenolic resins to be 1.3g/cm
3Density 1.0g/cm greater than water
3Density contrast, gum dipping process by vacuum pressed carries out impregnation to the salix monogolica strand after dyeing, the solidfied material content of the water-soluble modified phenolic resins that uses is 15%-20%, vacuum is suppressed to 0.08-0.085MPa, pressurize 30-40min, make its polymeric adsorbent amount reach 115%-120%, this moment, resin was dipped in the salix monogolica strand fiber finer cell, reached the effect to its evenly complete impregnation;
(6) drying behind the impregnation is handled:
The drying equipment that adopts is a mesh dryer, the salix monogolica strand behind the impregnation is carried out drying continuously handle, and kiln temperature is 100 ℃-110 ℃, wind speed is 4-5m/s, the guipure gait of march is 1.5-2m/min, and be 30-40min drying time, and dried moisture content is controlled in the 12%-15% scope;
(7) assembly with cold pressing:
The horizontal cold press that use has removable supporting plate carries out assembly and colds pressing; During assembly supporting plate is moved on the carriage of press tyre slideway from press, with the dried salix monogolica strand of impregnation by quantitatively weighing, pile up on supporting plate by its fibre length direction is parallel after weighing, salix monogolica strand behind supporting plate and the assembly sent in the press simultaneously cold pressing, at first with the pressure head on the master cylinder, blank is pushed in the pre-mould of placing of the cold press other end, pressurize then, the unit pressure of using is 550-650kg/cm
2, blank is drawn off to specification that sets and density at mould inner pressure;
(8) heat cure is handled:
The specification blank that has mould that will from cold press, draw off, pile up on the multilayer shelf in the high temperature kiln and carry out heating cure, solidification temperature is 140 ℃-145 ℃, the circulation wind speed is 2-2.5m/s, be 4-6 hour hardening time, kiln discharge when arriving air-cooled being cooled in back≤50 ℃ hardening time naturally cools to≤demoulding 35 ℃ the time together with mould behind the kiln discharge, and the dimension stock gluing and solidifying of cold moudling this moment be the salix mongolica dyed hard wood of integral body;
(9) sawing shaping:
Secondly six faces to salix mongolica dyed hard wood after the demoulding are processed, and at first two end faces to length direction carry out the scale sawing, four sides of length direction are carried out slicing respectively, make its become six smooth bright and clean, the qualified products of specification unanimity.
The specification limit of described salix mongolica dyed hard wood: length is 1000-6000mm, and width is 100-150mm, and thickness is 160-200mm.
The invention has the beneficial effects as follows: can use salix monogolica to make the dyeing hard wood in a large number as raw material; for salix monogolica has been opened up a new purposes widely; when solving the shortage of natural hard timber, can save a large amount of forest reserves; and preserve the ecological environment and play positive facilitation for administering the desert; process of the present invention is advanced practical; can carry out large-scale industrial production; dyeing hard wood of many uses; can be used as door and window; the floor; furniture; the boat deck; gun stock; staircase boards; the raw material of different woodworks such as balustrade uses; product is cost low quality height not only, and color and beautiful texture are beautiful.
The specific embodiment
Below in conjunction with preferred embodiment, to details are as follows according to the specific embodiment provided by the invention:
A kind of is that material density can reach 0.8g/cm with the salix monogolica
3-1.1g/cm
3Dyeing hard wood manufacture method, concrete implementation step is as follows:
The product specification of implementing is: 3200 * 120 * 180mm, density is 0.9g/cm
3
(1) preparation of salix monogolica strand
Adopt the pulley type roller that the salix monogolica bar is rolled, salix monogolica sent in the pulley type roller, through rolling after, justify the crust of shape salix monogolica bar and its core segment from, become flat-shaped salix monogolica strand;
(2) washing and bleaching
Between the salix monogolica strand space after rolling, understand the existence of some onal and salix monogolica core marrow slag, with the water tank that high-pressure hydraulic pump is housed the salix monogolica strand is washed processing, salix monogolica strand after rolling is put into the frock basket, open water pump cycle of higher pressure water, the part onal and the salix monogolica core marrow slag that exist between the salix monogolica strand space are rinsed well, put into Bellmer behind the trickle and bleach processing, make salix monogolica strand color basically identical, the bleaching liquid that uses is 30% aqueous hydrogen peroxide solution, temperature is 100 ℃-105 ℃, and the time is 2 hours;
(3) the dry processing
The drying equipment that adopts is a mesh dryer, the salix monogolica strand behind the impregnation is carried out drying continuously handle, and kiln temperature is 100 ℃-110 ℃, wind speed is 4-5m/s, the guipure gait of march is 3-4m/min, and be 20-30min drying time, and dried moisture content is in the 20%-25% scope;
(4) dyeing of salix monogolica strand
Adopt the colouring method of high-temperature pressurizing that the salix monogolica strand is dyeed, use equipment is the horizontal sealing load jar that has vacuum system and compression system and built-in heater, and is furnished with the heating reservoir consistent with the pressurized tank volume; At first allocate dyeing liquid in reservoir, color is made by oneself as required, and the use amount of dyestuff is for to be dyed 3% of salix monogolica strand weight, with water furnishing dyeing liquor, and dyeing liquor is heated in reservoir to 85 ℃-95 ℃; After the salix monogolica strand is delivered in the pressurized tank, at first being evacuated to gauge pressure is 0.085MPa, then dyeing liquor is evacuated to from reservoir in the pressurized tank, will be dyed and be forced into 1.4MPa after the salix monogolica strand soaks fully, heat to 100 ℃-110 ℃, pressure-maintaining and heat-preservation release after 80 minutes, after the release with the dyeing liquor pumpback to reservoir, being evacuated to gauge pressure again is 0.085MPa, keeps 30 minutes, the moisture that will be dyed in the salix monogolica bar is extracted out, does not have the dropping liquid phenomenon when making its discharging and takes place; The dyeing liquor of pumpback to the reservoir, by chemically examining its content and carrying out appropriate supplement and fill dyestuff, dyeing liquor can be recycled;
(5) impregnation
Use water-soluble modified phenolic resins to use as the adhesive of material, the dyeing salix monogolica strand that employing will be wet is placed in the vacuum pressed jar, utilizes the density of phenolic resins to be 1.3g/cm
3Density 1.0g/cm greater than water
3Density contrast, gum dipping process by vacuum pressed, salix monogolica strand after the dyeing is carried out impregnation, the solidfied material content of the water-soluble modified phenolic resins that uses is 30%, vacuum is suppressed to 0.085MPa, and pressurize 40min makes its polymeric adsorbent amount reach 120%, this moment, resin was dipped in the salix monogolica strand fiber finer cell, reached the effect to the evenly complete impregnation of material;
(6) drying behind the impregnation is handled
The drying equipment that adopts is a mesh dryer, the salix monogolica strand behind the impregnation is carried out drying continuously handle, and kiln temperature is 100 ℃-110 ℃, wind speed is 4-5m/s, the guipure gait of march is 1.5-2m/min, and be 30-40min drying time, and dried moisture content is controlled in the 12%-15% scope;
(7) assembly with cold pressing
The horizontal cold press that use has removable supporting plate carries out assembly and colds pressing, the work gross pressure of horizontal cold press is 2800 tons, but the specification limit of pressed material: 3400 * 130 * 190mm, during assembly supporting plate moved to press in addition on the carriage of slideway from press, with the dried salix monogolica strand of impregnation by quantitatively weighing; The computing formula of material use amount is: volume * density; Be 68.68kg through calculating the salix monogolica strand weight that every block specifications material uses, be placed on 3400 * 800mm supporting plate by the parallel uniform coding of its fibre length direction after weighing, the blank of forming 3300 * 700 * 300mm, supporting plate and blank sent in the press simultaneously cold pressing, at first use the prefabricating oil cylinder and the device on press top, sotck thinkness is compressed to 180mm, start master cylinder then, with the pressure head that is connected on the master cylinder blank is pushed in the mould of pre-3300 * 125 * 185mm that places of the cold press other end, the unit pressure of using is 620kg/cm
2Compress, it is 0.9 dimension stock that blank is made density at mould inner pressure;
(8) heat cure is handled
The dimension stock that has mould that will from cold press, draw off, pile up on the multilayer shelf in the high temperature kiln and carry out heating cure, solidification temperature is 140 ℃-145 ℃, the circulation wind speed is 2-2.5m/s, be 5 hours hardening time, and kiln discharge when arriving air-cooled being cooled in back≤50 ℃ hardening time naturally cools to≤demoulding 35 ℃ the time together with mould behind the kiln discharge, the dimension stock of cold moudling this moment is gluing and solidifying, becomes whole salix mongolica dyed hard wood;
(9) sawing shaping
Dimension stock after the demoulding is carried out six face machining and shapings, at first two end faces to length direction carry out sawing, effective length after the processing is 3200mm, secondly slicing is carried out in two sides of length direction, effective width after the processing is 120mm, at last slicing is carried out in two other side of length direction, and the effective thickness after the processing is 180mm, finally make its become six smooth bright and clean, specification is the qualified products of 3200 * 120 * 180mm.
The specification limit of described salix mongolica dyed hard wood: length is 1000-6000mm, and width is 100-150mm, and thickness is 160-200mm, and for example: making specification is 2000 * 105 * 160mm etc.
Above-mentionedly the manufacture method of salix mongolica dyed hard wood is described in detail with reference to embodiment; be illustrative rather than determinate; can list a plurality of embodiment according to institute's limited range; therefore in the variation and the modification that do not break away under the general plotting of the present invention, should belong within protection scope of the present invention.
Claims (1)
1. one kind is raw material with the salix monogolica, and density can reach 0.8g/cm
3-1.1g/cm
3The manufacture method of dyeing hard wood, it is characterized in that concrete implementation step is as follows:
(1) preparation of salix monogolica strand:
Adopt the pulley type roller that the salix monogolica bar is rolled, salix monogolica is sent in the pulley type roller, the crust of circle shape salix monogolica bar separates with its trunk branch after rolling, and becomes flat-shaped salix monogolica strand;
(2) washing and bleaching:
Between the salix monogolica strand space after rolling, understand the existence of some onal and salix monogolica core marrow slag, with the water tank that high-pressure hydraulic pump is housed the salix monogolica strand is washed, salix monogolica strand after rolling is put into the frock basket, open water pump cycle of higher pressure water, the part onal and the core marrow slag that exist between the salix monogolica strand space are rinsed well, put into Bellmer behind the trickle and bleach processing, make salix monogolica strand color basically identical, the bleaching liquid that uses is the aqueous hydrogen peroxide solution of 25%-30%, temperature is 100 ℃-110 ℃, and the time is 2-3 hour;
(3) the dry processing:
The drying equipment that adopts is a mesh dryer, salix monogolica strand after flushing and the bleaching is carried out drying continuously to be handled, kiln temperature is 100 ℃-110 ℃, wind speed is 4-5m/s, the guipure gait of march is 3-4m/min, be 20-30min drying time, and dried moisture content is controlled in the 20%-25% scope;
(4) dyeing of salix monogolica strand:
Adopt the colouring method of high-temperature pressurizing that the salix monogolica strand is dyeed, use equipment is the horizontal sealing load jar that has vacuum system and compression system and built-in heater, and is furnished with the heating reservoir consistent with the pressurized tank volume; At first allocate dyeing liquor in reservoir, color is made by oneself as required, and the use amount of dyestuff is for to be dyed the 2.5%-3% of salix monogolica strand weight, with water furnishing dyeing liquor, and dyeing liquor is heated in reservoir to 85 ℃-95 ℃; After the salix monogolica strand is delivered in the pressurized tank, at first being evacuated to gauge pressure is 0.08-0.085MPa, from reservoir, be evacuated to dyeing liquor in the pressurized tank then, to be dyed and be forced into 1.2-1.4MPa after the salix monogolica strand soaks fully, heat to 100 ℃-110 ℃, release after pressure-maintaining and heat-preservation 60-80 minute, after the release with the dyeing liquor pumpback to reservoir, being evacuated to gauge pressure again is that 0.08-0.085MPa kept 20-30 minute, the moisture that will be dyed in the salix monogolica bar is extracted out, does not have the dropping liquid phenomenon when making its discharging and takes place, the dyeing liquor of pumpback to the reservoir, by chemically examining its content and carrying out appropriate supplement and fill dyestuff, dyeing liquor can be recycled;
(5) impregnation:
Use water-soluble modified phenolic resins to use as the adhesive of material, the dyeing salix monogolica strand that employing will be wet is placed in the vacuum pressed jar, and the density of utilizing phenolic resins is 1.3 g/cm
3Density 1.0 g/cm greater than water
3Density contrast, gum dipping process by vacuum pressed carries out impregnation to the salix monogolica strand after dyeing, the solidfied material content of the water-soluble modified phenolic resins that uses is 15%-20%, vacuum is suppressed to 0.08-0.085MPa, pressurize 30-40min, make its polymeric adsorbent amount reach 115%-120%, this moment, resin was dipped in the salix monogolica strand fiber finer cell, reached the effect to its evenly complete impregnation;
(6) drying behind the impregnation is handled:
The drying equipment that adopts is a mesh dryer, the salix monogolica strand behind the impregnation is carried out drying continuously handle, and kiln temperature is 100 ℃-110 ℃, wind speed is 4-5m/s, the guipure gait of march is 1.5-2m/min, and be 30-40min drying time, and dried moisture content is controlled at 12%-15%;
(7) assembly with cold pressing:
The horizontal cold press that use has removable supporting plate carries out assembly and colds pressing; During assembly supporting plate is moved on the carriage of press tyre slideway from press, with the dried salix monogolica strand of impregnation by quantitatively weighing, pile up on supporting plate by its fibre length direction is parallel after weighing, salix monogolica strand behind supporting plate and the assembly sent in the press simultaneously cold pressing, at first with the pressure head on the master cylinder, blank is pushed in the pre-mould of placing of the cold press other end, pressurize then, the unit pressure of using is 600-700kg/cm
2, blank is drawn off to specification that sets and density at mould inner pressure;
(8) heat cure is handled:
The specification blank that has mould that will from cold press, draw off, pile up on the multilayer shelf in the high temperature kiln and carry out heating cure, solidification temperature is 140 ℃-145 ℃, the circulation wind speed is 2-2.5m/s, be 4-6 hour hardening time, and kiln discharge when arriving air-cooled being cooled in back≤50 ℃ hardening time naturally cools to≤demoulding 35 ℃ the time together with mould behind the kiln discharge, the dimension stock of cold moudling this moment is gluing and solidifying, becomes whole salix mongolica dyed hard wood;
(9) sawing shaping:
Secondly six faces to salix mongolica dyed hard wood after the demoulding are processed, and at first two end faces to length direction carry out the scale sawing, four sides of length direction are carried out slicing respectively, make its become six smooth bright and clean, the qualified products of specification unanimity.
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| CN102554998A (en) * | 2012-02-21 | 2012-07-11 | 云南勐象竹业有限公司 | Method for preparing eucalyptus structural wood |
| CN103507138A (en) * | 2012-06-28 | 2014-01-15 | 中山市大自然木业有限公司 | Method for preparing colorful artificial fiberboard |
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