CN1724229A - Method for producing light-weight hard fibre board - Google Patents
Method for producing light-weight hard fibre board Download PDFInfo
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- CN1724229A CN1724229A CN 200510012661 CN200510012661A CN1724229A CN 1724229 A CN1724229 A CN 1724229A CN 200510012661 CN200510012661 CN 200510012661 CN 200510012661 A CN200510012661 A CN 200510012661A CN 1724229 A CN1724229 A CN 1724229A
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- light
- fibre board
- production method
- weight hard
- veneer
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Abstract
A technology for producing the light and hard fiber-board by dry method includes such steps as scraping strips, washing, digestion, thermal grinding, spraying resin, drying, spreading, pre-pressing, hot pressing, sawing and polishing.
Description
Technical field
The invention belongs to the fibrous plate technical field, relate in particular to a kind of production method of producing light-weight hard fibre board by wood-fibred.
Background technology
Fiberboard is one of main plate kind of wood-base fibre and particle panel material material, and its raw materials for production are extensive, is the effective and reasonable main path that utilizes limited forest tree resource.The production method of fiberboard comprises wet method and two kinds of technologies of dry method.Wherein wet process technique is mainly used in the production of hard high density fiberboard (more than the 800Kg/m) and softboard (400Kg/m is following); Dry technology for production is mainly used in high density fiberboard and medium density fibre board (MDF) (about 750Kg/m).The softboard that utilizes wet processing to produce at present, although the less very light weight of density, because the softer and rough surface of its quality, so its purposes has been subjected to considerable restraint; And utilize the fiberboard of the middle-high density that dry technology for production produces, because of its weight is bigger, use also to be subjected to certain restriction.
The content of invention
Purpose of the present invention just provides the production method of the light-weight hard fibre board that the two sides is smooth, quality is strong that the enough dry process of a kind of energy produce.
The technical scheme that realizes above-mentioned purpose of the present invention is:
A kind of production method of light-weight hard fibre board adopts dry process production, comprises the following steps:
The first step: chip, timber is whittled into veneer with wood chipping equipment;
Second step: clean, water cleans obtained veneer;
The 3rd step: boiling;
The 3rd step: defibrator process, use the veneer after two wafer lapping machines will clean to wear into fibre bundle;
The 4th step: spray glue, evenly spray glue in the fiber of wearing into;
The 5th step: pipeline drying, in the pipeline of drying, be blown into hot blast, by heated-air drying, make its water content reduce to 9%--15% the fiber behind the spray glue;
The 6th step: mat formation;
The 7th step: precompressed;
The 8th step: hot pressing;
The 9th step: sawing;
The tenth step: sanding, finished product.
Its additional technical feature comprises:
In the described step of chipping, the wood fragments bits of cutting out are removed;
The thickness of described veneer is the 2--6 millimeter;
The fineness of the fiber that the veneer after the two wafer lapping machines of described usefulness will clean is worn into accounts for 25-30% for the 16-20 purpose;
Described glue is urea-formaldehyde glue, phenol glue;
Described glue discharge rate is the fiberboard of every cubic metre of 100-120Kg/;
The dried water content of described fiber wind is 10%-12%;
The pressure of described hot pressing is 0.3--0.5Mpa;
The thickness of described precompressed is the 40--60% of pavement thickness.
The production method of light-weight hard fibre board provided by the present invention compared with prior art, because adopted its operation to comprise to chip, cleaning, boiling, defibrator process, spray glue, drying, mat formation, the dry process of precompressed, hot pressing, sawing, sanding, finished product, and in the defibrator process in this technology, spray glue, drying, the hot pressing process, chosen suitable technological parameter, therefore, the light-weight hard fibre board of producing has the advantage that the two sides is smooth, quality is strong.
Description of drawings
Accompanying drawing is the structural representation that utilizes the light-weight hard fibre board that method provided by the invention produces.
The specific embodiment
The first step: chip, timber is cut into 18 * 15 * 5 millimeters veneer with wood chipping equipment, and chip is screened out with sieve;
Second step: clean, water cleans veneer;
The 3rd step: boiling, the veneer boiling after will cleaning with 120 ℃ high-temperature steams 6 minutes;
The 3rd step: defibrator process, the veneer after the two wafer lapping machines of usefulness will clean is worn into 15 purpose fibre bundles and is accounted for 60% wood-fibred;
The 4th step: spray glue, in the fiber of wearing into, evenly spray the ratio spray glue of 100Kg urea-formaldehyde resin adhesive in the ratio of every cubic metre of designed fiberboard;
The 5th step: pipeline drying with hot blast wind drying, makes its water content reduce to 9% the fibre bundle behind the spray glue;
The 6th step: mat formation, the fibre bundle of drying is dressed up 230 millimeters thickness at forming room's middle berth;
The 7th step: precompressed makes its thickness reduce to 115 millimeters after the preformer precompressed;
The 8th step: hot pressing, the blank flat after the precompressed is sent in the hot press, blank flat is pressed into the fiberboard of 25 millimeters thick with the pressure of 0.3Mpa;
The 9th step: sawing, sanding, finished product promptly promptly get the light-weight hard fibre board finished product that dredge for fiber for closely knit shiny surface, middle part 2 on two sides 1 as shown in the figure after sawing, sanding.
The first step: chip, timber is cut into 19 * 16 * 2 millimeters veneer with wood chipping equipment, and chip is screened out with sieve;
Second step: clean, water cleans veneer;
The 3rd step: boiling, the veneer boiling after will cleaning with 125 ℃ high-temperature steams 4 minutes;
The 3rd step: defibrator process, the veneer after the two wafer lapping machines of usefulness will clean is worn into 16 purpose fibre bundles and is accounted for 50% wood-fibred;
The 4th step: spray glue, in the fiber of wearing into, evenly spray the ratio spray glue of 115Kg urea-formaldehyde resin adhesive in the ratio of every cubic metre of designed fiberboard;
The 5th step: pipeline drying with hot blast wind drying, makes its water content reduce to 10% the fibre bundle behind the spray glue;
The 6th step: mat formation, the fibre bundle of drying is dressed up 230 millimeters thickness at forming room's middle berth;
The 7th step: precompressed makes its thickness reduce to 92 millimeters after the preformer precompressed;
The 8th step: hot pressing, the blank flat after the precompressed is sent in the hot press, blank flat is pressed into the fiberboard of 20 millimeters thick with the pressure of 0.4Mpa;
The 9th step: sawing, sanding, finished product promptly promptly get the light-weight hard fibre board finished product that dredge for fiber for closely knit shiny surface, middle part 2 on two sides 1 as shown in the figure after sawing, sanding.
Embodiment 3
The first step: chip, timber is cut into 20 * 16 * 3 millimeters veneer with wood chipping equipment, and chip is screened out with sieve;
Second step: clean, water cleans veneer;
The 3rd step: boiling, the veneer boiling after will cleaning with 130 ℃ high-temperature steams 3 minutes;
The 3rd step: defibrator process, the veneer after the two wafer lapping machines of usefulness will clean is worn into 17 purpose fibers and is accounted for 70% wood-fibred;
The 4th step: spray glue, in the fiber of wearing into, evenly spray the ratio spray glue of 120Kg731 type water-soluble resin in the ratio of every cubic metre of designed fiberboard;
The 5th step: pipeline drying with hot blast wind drying, makes its water content reduce to 11% the fiber behind the spray glue;
The 6th step: mat formation, the fiber of drying is dressed up 230 millimeters thickness at forming room's middle berth;
The 7th step: precompressed makes its thickness reduce to 138 millimeters after the preformer precompressed;
The 8th step: hot pressing, the blank flat after the precompressed is sent in the hot press, blank flat is pressed into the fiberboard of 30 millimeters thick with the pressure of 0.5Mpa;
The 9th step: sawing, sanding, finished product promptly promptly get the low-density fibre board finished product that dredge for fiber for closely knit shiny surface, middle part 2 on two sides 1 as shown in the figure after sawing, sanding.
Embodiment 4
The first step: chip, timber is cut into 18 * 15 * 6 millimeters veneer with wood chipping equipment, and chip is screened out with sieve;
Second step: clean, water cleans veneer;
The 3rd step: boiling, the veneer boiling after will cleaning with 135 ℃ high-temperature steams 5 minutes;
The 3rd step: defibrator process, the veneer after the two wafer lapping machines of usefulness will clean is worn into 18 purpose fibers and is accounted for 80% wood-fibred;
The 4th step: spray glue, in the fiber of wearing into, evenly spray the ratio spray glue of 117Kg urea-formaldehyde resin adhesive in the ratio of every cubic metre of designed fiberboard;
The 5th step: pipeline drying with hot blast wind drying, makes its water content reduce to 12% the fiber behind the spray glue;
The 6th step: mat formation, the fiber of drying is dressed up 230 millimeters thickness at forming room's middle berth;
The 7th step: precompressed makes its thickness reduce to 115 millimeters after the preformer precompressed;
The 8th step: hot pressing, the blank flat after the precompressed is sent in the hot press, blank flat is pressed into the fiberboard of 20 millimeters thick with the pressure of 0.3Mpa;
The 9th step: sawing, sanding, finished product promptly promptly get the light-weight hard fibre board finished product that dredge for fiber for closely knit shiny surface, middle part 2 on two sides 1 as shown in the figure after sawing, sanding.
Embodiment 5
The first step: chip, timber is cut into 18 * 10 * 4 millimeters veneer with wood chipping equipment, and chip is screened out with sieve;
Second step: clean, water cleans veneer;
The 3rd step: boiling, the veneer boiling after will cleaning with 140 ℃ high-temperature steams 3 minutes;
The 3rd step: defibrator process, the veneer after the two wafer lapping machines of usefulness will clean is worn into 20 purpose fibre bundles and is accounted for 75% wood-fibred;
The 4th step: spray glue, in the fiber of wearing into, evenly spray the ratio spray glue of 120Kg urea-formaldehyde resin adhesive in the ratio of every cubic metre of designed fiberboard;
The 5th step: pipeline drying with hot blast wind drying, makes its water content reduce to 11% the fibre bundle behind the spray glue;
The 6th step: mat formation, the fibre bundle of drying is dressed up 230 millimeters thickness at forming room's middle berth;
The 7th step: precompressed makes its thickness reduce to 120 millimeters after the preformer precompressed;
The 8th step: hot pressing, the blank flat after the precompressed is sent in the hot press, blank flat is pressed into the fiberboard of 25 millimeters thick with the pressure of 0.4Mpa;
The 9th step: sawing, sanding, finished product promptly promptly get the low-density fibre board finished product that dredge for fiber for closely knit shiny surface, middle part 2 on two sides 1 as shown in the figure after sawing, sanding.
In the production technology of this light-weight hard fibre board, water content and the isoparametric selection of the steam pressure in the hot pressing process after drying of spray glue amount, wood fiber bundle is to utilize dry process to produce the key of low density fiberboard.Spray glue amount is too big, and the fiberboard density of then producing is bigger, the fiberboard of density in belonging to; Spray glue amount is too little, effectively combination between fibre bundle, and the fiberboard insufficient strength of then producing can not be used.Wood fiber bundle water content after drying is too big, and then hot pressing time will extend, and influences production efficiency; Water content is too little, then is unfavorable for the discharging of free formaldehyde, influences the environmental protection index parameter of fiberboard.Steam pressure in the hot pressing process is too big, then can make the increase in density of fiberboard, otherwise influences its mechanical strength.
The production technology of this light body hard low density fiberboard then just fall benefit solution this problem.
Claims (9)
1, a kind of production method of light-weight hard fibre board is characterized in that it being to adopt dry process production, comprises the following steps:
The first step: chip, timber is whittled into veneer with wood chipping equipment;
Second step: clean, water cleans obtained veneer;
The 3rd step: boiling;
The 3rd step: defibrator process, use the veneer after two wafer lapping machines will clean to wear into fibre bundle;
The 4th step: spray glue, evenly spray glue in the fiber of wearing into;
The 5th step: pipeline drying, in the pipeline of drying, be blown into hot blast, by heated-air drying, make its water content reduce to 9% the fiber behind the spray glue---15%;
The 6th step: mat formation;
The 7th step: precompressed;
The 8th step: hot pressing;
The 9th step: sawing;
The tenth step: sanding, finished product.
2, the production method of a kind of light-weight hard fibre board according to claim 1 is characterized in that: in the described step of chipping, the wood fragments bits of cutting out are removed.
3, the production method of a kind of light-weight hard fibre board according to claim 1 is characterized in that: the thickness of described veneer is 2---6 millimeters.
4, the production method of a kind of light-weight hard fibre board according to claim 1 and 2 is characterized in that: the fineness of the fiber that the veneer after the two wafer lapping machines of described usefulness will clean is worn into accounts for 25-30% for the 16-20 purpose.
5, the production method of a kind of light-weight hard fibre board according to claim 1 is characterized in that: described glue is urea-formaldehyde glue, phenol glue.
6, the production method of a kind of light-weight hard fibre board according to claim 1 is characterized in that: described glue discharge rate is the fiberboard of every cubic metre of 100-120Kg/.
7, the production method of a kind of light-weight hard fibre board according to claim 1 is characterized in that: the dried water content of described fiber wind is 10%-12%.
8, the production method of a kind of light-weight hard fibre board according to claim 4 is characterized in that: the pressure of described hot pressing is 0.3---0.5Mpa.
9, the production method of a kind of light-weight hard fibre board according to claim 4 is characterized in that: the thickness of described precompressed is 40 of pavement thickness---60%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510012661 CN1724229A (en) | 2005-07-06 | 2005-07-06 | Method for producing light-weight hard fibre board |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510012661 CN1724229A (en) | 2005-07-06 | 2005-07-06 | Method for producing light-weight hard fibre board |
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| CN1724229A true CN1724229A (en) | 2006-01-25 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101337373B (en) * | 2008-01-11 | 2011-10-05 | 南京林业大学 | Preparation method of silver-grass fiber board of medium density |
| CN104669394A (en) * | 2015-02-10 | 2015-06-03 | 中国福马机械集团有限公司 | Method for manufacturing light-weight fiberboard |
| CN105649260A (en) * | 2016-03-24 | 2016-06-08 | 浙江圣奥家具制造有限公司 | Decorative board for open area and manufacturing method thereof |
-
2005
- 2005-07-06 CN CN 200510012661 patent/CN1724229A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101337373B (en) * | 2008-01-11 | 2011-10-05 | 南京林业大学 | Preparation method of silver-grass fiber board of medium density |
| CN104669394A (en) * | 2015-02-10 | 2015-06-03 | 中国福马机械集团有限公司 | Method for manufacturing light-weight fiberboard |
| CN105649260A (en) * | 2016-03-24 | 2016-06-08 | 浙江圣奥家具制造有限公司 | Decorative board for open area and manufacturing method thereof |
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