CN1861348A - Method for producing aldehyde-free soft board made of wheat straw - Google Patents
Method for producing aldehyde-free soft board made of wheat straw Download PDFInfo
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- CN1861348A CN1861348A CN 200610085520 CN200610085520A CN1861348A CN 1861348 A CN1861348 A CN 1861348A CN 200610085520 CN200610085520 CN 200610085520 CN 200610085520 A CN200610085520 A CN 200610085520A CN 1861348 A CN1861348 A CN 1861348A
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Abstract
A soft wheat straw board without aldehyde is prepared through breaking by 10-15 mm, drying, fine breaking by 3-8 mm, sorting, mixing with glue, mechanical spreading, pre-pressing, hot pressing, intermittent pressing, cutting for removing edges, and cooling.
Description
Technical field
What the present invention relates to is a kind of manufacture method of aldehyde-free soft board made of wheat straw.Belong to wood-based plate and make the field.
Background technology
At present; because various countries are to the protection of the environment and the forest reserves; progressively the timber processing artificial boards is adopted in restriction; but society is continuing to increase the demand of wood-based plate; various countries all strengthen adopting agricultural crop straw to make the research of wood-based plate, and aldehyde-free soft board made of wheat straw is to utilize wheat straw to make a kind of low-density wood-based plate for raw material.
Summary of the invention
But the aldehyde-free soft board made of wheat straw method of manufacturing technology that the purpose of this invention is to provide a kind of suitability for industrialized production.Because what adopt is that agricultural crop straw is a raw material,, it makes the defective that wood-based plate causes environmental pollution so effectively having solved with timber.
Technical solution of the present invention: the manufacture method of aldehyde-free soft board made of wheat straw is characterized in that its processing step is:
One, coarse crushing: the mode that adopts hammer to pulverize, feeding is even, and the specification of screen cloth is divided according to the size of mesh, and mesh size is at 10mm～15mm; It is that the approaching raw material of moisture content feeds continuously that the input of coarse crushing raw material requires as far as possible; Sprinkler head is equipped with at the place at the oblique belt of feeding, carries out humidification to a certain degree when the raw material moisture content is low;
Two, with drying machine raw material is carried out drying, make the raw material moisture content be controlled at 10%～22%;
Describedly raw material is carried out drying with drying machine, conduction oil is added hot-air by heat exchanger, by the raw material of hot-air after the drying box inner drying is by coarse crushing, can be by adjusting oil temperature, wind-warm syndrome, three parameters of air quantity and adjust degree and the moisture content that guipure speed be controlled raw material drying, the serpentine material conveying guipure that the interior employing of drying machine can speed governing.
Three, the smart pulverizing: dried raw material is carried out the secondary pulverizing at this, two screen clothes is installed is carried out work, and the mesh size of screen cloth is at 3mm～8mm;
Four, raw material sorting: finish by separator, adopt the mode of flow separation, adjust the effect of separation, adjust according to concrete sheet material specification and supporting technological requirement by the aperture of adjusting air door, finished product raw material after the sorting, bulk density is controlled at 50～80Kg/m
3, content of ashes is controlled at 15%～20%;
Five, finished product bin: the finished product raw material that the preparation of preliminary treatment workshop section is finished stores at this;
Six, raw material is weighed: adopt and divide the mode of weighing in batches, the weight of setting every batch of raw material is at 120Kg～180Kg;
Seven, poor applying glue is stirred: in the glue mixing storehouse, stir, use isocyanates to be adhesive, raw material and glue are mixed, send into the feed bin of mating formation then, resin added be set in 2.5%～2.9% of raw material gross weight.
Eight, installation: mechanical type is mated formation, and single spreading head, turns to wait and adjusts mat formation form and quality the angle that can be by adjusting deflector and the rotating speed of feed opening spacing and material casting roller, reaches the requirement of technology.
Nine, precompressed, hot pressing, the batch (-type) concora crush is realized the predischarge of slab, uses five laminating machinees, hot compression parameters, temperature is set in 150～170 ℃; Hot pressing curve adopt to divide two sections modes of boosting step by step in the section of boosting, and high pressure section pressure is controlled at 90～150bar, and first order pressure is generally 50%～70% of second section pressure, the high pressure section dwell time generally about 10S; Divide four sections releases step by step then, every section pressure reduction between 15bar～40bar; Boost and the speed precision of release is had relatively high expectations, generally be set in 0.5bar～2.5bar/s, speed difference between each section; With 8mm and 9mm soft board is example, and pressing cycle is generally 180S～225S, and the pressing cycle constant is 20～25S/mm.
Ten, cutting edge cooling: implement vertically, laterally distinguish cutting edge, cooling then with vertical cut-to-size saw and horizontal cut-to-size saw.
Advantage of the present invention: technology is easy, practicable suitability for industrialized production; Adopting agricultural crop straw is the soft wood-based plate of no aldehyde wheat straw that raw material is made, and non-environmental-pollution, cost are low, has solved the outlet of agricultural crop straw.
The specific embodiment
Embodiment 1, the manufacture method of aldehyde-free soft board made of wheat straw, and its processing step branch:
One, coarse crushing: the mode that adopts hammer to pulverize, the mesh size of screen cloth is at 15mm; Feeding requires evenly, and it is that the approaching raw material of moisture content feeds continuously that the input of raw material requires as far as possible.Sprinkler head is equipped with at the place at the oblique belt of feeding, can carry out humidification to a certain degree when the raw material moisture content is low.
Two, dry (drying machine CS-02-01): conduction oil adds hot-air by heat exchanger, by the raw material of hot-air after the drying box inner drying is by coarse crushing, can be by adjusting oil temperature (120 ℃), wind-warm syndrome (90 ℃), (100%) three parameter of air quantity and adjust degree and the moisture content that guipure speed be controlled raw material drying, the serpentine material conveying guipure that employing can speed governing in the drying machine.Finally make the raw material moisture content be controlled at 22%.
Three, the smart pulverizing: dried raw material is carried out secondary at this and is pulverized, the mode that adopts hammer to pulverize, need to install two screen clothes and carry out work, control the construction form and the composition of raw material by the specification of changing screen cloth, the mesh size of screen cloth is at 8mm, the specification of two screen clothes can be different, and concrete collocation will be determined according to raw material and concrete technological requirement.
Four, raw material sorting: finish by separator, adopt the mode of flow separation, adjust the effect of separation, adjust according to concrete sheet material specification and supporting technological requirement by the aperture of adjusting air door.Finished product raw material after the sorting, bulk density generally is controlled at 80Kg/m3, and content of ashes is controlled at 20%.
Five, finished product bin: the finished product raw material that preliminary treatment workshop section preparation is finished stores at this, only reaches the production of could starting shooting of certain material level main line.
Six, raw material is weighed: adopt and divide the mode of weighing in batches to take by weighing raw material, the weight of setting every batch of raw material is at 180Kg.
Seven, applying glue is stirred: adopt glue spraying head to carry out applying glue, use isocyanates to be adhesive, this glue spraying head use compressed air is finished the atomizing of glue and is sprayed, in the glue mixing storehouse, stir, making raw material and isocyanates is that adhesive glue mixes, send into the feed bin of mating formation then, resin added is set in 2.9% of raw material gross weight.
Eight, mechanical type is mated formation, and single spreading head, turns to wait and adjusts mat formation form and quality the angle that can be by adjusting deflector and the rotating speed of feed opening spacing and material casting roller, reaches the requirement of technology.
Nine, precompressed, hot pressing, precompressed: the batch (-type) concora crush, realize the predischarge of slab; Hot pressing: five laminating machinees (CS-07-08), hot pressing temperature is at 170 ℃; Hot pressing curve adopt to divide two sections modes of boosting step by step in the section of boosting, and high pressure section pressure is controlled at 150bar, and first section pressure is 70% of second section pressure, the high pressure section dwell time at 10S; Divide four sections releases step by step then, every section pressure reduction is at 40bar; Boost and the rate setting of release at 2.5bar/s, speed difference between each section; With the 9mm soft board is example, and pressing cycle is 225S, and the pressing cycle constant is 25S/mm.
Ten, cutting edge cooling: each one of vertical cut-to-size saw (CS-08-02) and horizontal cut-to-size saw (CS-08-05) is arranged, realize vertically, laterally cutting edge, weighing unit is housed after cutting out the horizontal cut-to-size saw of plate, be used to measure the weight of plate after the cutting edge, and in time feed back to master-control room as adjusting ground foundation, cooling at last.
Factory's soft board density range: 500Kg/m3.
Embodiment 2, the manufacture method of aldehyde-free soft board made of wheat straw, and its processing step branch:
One, coarse crushing: the mode that adopts hammer to pulverize, the mesh size of screen cloth is at 10mm; Feeding requires evenly, and it is that the approaching raw material of moisture content feeds continuously that the input of raw material requires as far as possible.Sprinkler head is equipped with at the place at the oblique belt of feeding, can carry out humidification to a certain degree when the raw material moisture content is low.
Two, dry (drying machine CS-02-01): conduction oil adds hot-air by heat exchanger, by the raw material of hot-air after the drying box inner drying is by coarse crushing, can be by adjusting oil temperature (50 ℃), wind-warm syndrome (40 ℃), (10%) three parameter of air quantity and adjust degree and the moisture content that guipure speed be controlled raw material drying, the serpentine material conveying guipure that employing can speed governing in the drying machine.The raw material moisture content is controlled between 10%.
Three, the smart pulverizing: dried raw material is carried out secondary at this and is pulverized, the mode that adopts hammer to pulverize, need to install two screen clothes and carry out work, control the construction form and the composition of raw material by the specification of changing screen cloth, the mesh size of screen cloth is at 3mm, the specification of two screen clothes can be different, and concrete collocation will be determined according to raw material and concrete technological requirement.
Four, raw material sorting: finish by separator, adopt the mode of flow separation, adjust the effect of separation, adjust according to concrete sheet material specification and supporting technological requirement by the aperture of adjusting air door.Finished product raw material after the sorting, bulk density generally is controlled at 50Kg/m3, and content of ashes is controlled at 15%.
Five, finished product bin: the finished product raw material that preliminary treatment workshop section preparation is finished stores at this, only reaches the production of could starting shooting of certain material level main line.
Six, raw material is weighed: adopt and divide the mode of weighing in batches to take by weighing raw material, the weight of setting every batch of raw material is at 120Kg.
Seven, applying glue is stirred: adopt glue spraying head to carry out applying glue, use isocyanates to be adhesive, this glue spraying head use compressed air is finished the atomizing of glue and is sprayed, in the glue mixing storehouse, stir, raw material and glue are mixed, send into the feed bin of mating formation then, resin added is set in 2.5%% of raw material gross weight.
Eight, mechanical type is mated formation, and single spreading head, turns to wait and adjusts mat formation form and quality the angle that can be by adjusting deflector and the rotating speed of feed opening spacing and material casting roller, reaches the requirement of technology.
Nine, precompressed, hot pressing, precompressed: the batch (-type) concora crush, realize the predischarge of slab; Hot pressing: five laminating machinees (CS-07-08), hot pressing temperature is at 150 ℃; Hot pressing curve adopt to divide two sections modes of boosting step by step in the section of boosting, and high pressure section pressure is controlled at 90bar, and first section pressure is 50% of second section pressure, the high pressure section dwell time at 11S; Divide four sections releases step by step then, every section pressure reduction is at 15bar; Boost and the rate setting of release at 0.5bar/s, speed difference between each section; With the 8mm soft board is example, and pressing cycle is 180S, and the pressing cycle constant is 20S/mm.
Ten, cutting edge cooling: each one of vertical cut-to-size saw (CS-08-02) and horizontal cut-to-size saw (CS-08-05) is arranged, realize vertically, laterally cutting edge, weighing unit is housed after cutting out the horizontal cut-to-size saw of plate, be used to measure the weight of plate after the cutting edge, and in time feed back to master-control room as adjusting ground foundation, cooling at last.
Factory's soft board density range: 340Kg/m3/m3.
Claims (1)
1, the manufacture method of aldehyde-free soft board made of wheat straw is characterized in that its processing step is:
One, coarse crushing: the mode that adopts hammer to pulverize, feeding is even, and the specification of screen cloth is divided according to the size of mesh, and mesh size is at 10mm～15mm; It is that the approaching raw material of moisture content feeds continuously that the input of coarse crushing raw material requires as far as possible; Sprinkler head is equipped with at the place at the oblique belt of feeding, carries out humidification to a certain degree when the raw material moisture content is low;
Two, with drying machine raw material is carried out drying, make the raw material moisture content be controlled at 10%～22%; Describedly raw material is carried out drying with drying machine, conduction oil is added hot-air by heat exchanger, by the raw material of hot-air after the drying box inner drying is by coarse crushing, can be by adjusting oil temperature, wind-warm syndrome, three parameters of air quantity and adjust degree and the moisture content that guipure speed be controlled raw material drying, the serpentine material conveying guipure that the interior employing of drying machine can speed governing.
Three, the smart pulverizing: dried raw material is carried out the secondary pulverizing at this, two screen clothes is installed is carried out work, and the mesh size of screen cloth is at 3mm～8mm;
Four, raw material sorting: finish by separator, adopt the mode of flow separation, adjust the effect of separation, adjust according to concrete sheet material specification and supporting technological requirement by the aperture of adjusting air door, finished product raw material after the sorting, bulk density is controlled at 50～80Kg/m
3, content of ashes is controlled at 15%～20%;
Five, finished product bin: the finished product raw material that the preparation of preliminary treatment workshop section is finished stores at this;
Six, raw material is weighed: adopt and divide the mode of weighing in batches, the weight of setting every batch of raw material is at 120Kg～180Kg;
Seven, poor applying glue is stirred: in the glue mixing storehouse, stir, use isocyanates to be adhesive, raw material and glue are mixed, send into the feed bin of mating formation then, resin added be set in 2.5%～2.9% of raw material gross weight.
Eight, installation: mechanical type is mated formation, and single spreading head, turns to wait and adjusts mat formation form and quality the angle that can be by adjusting deflector and the rotating speed of feed opening spacing and material casting roller, reaches the requirement of technology.
Nine, precompressed, hot pressing, the batch (-type) concora crush is realized the predischarge of slab, uses five laminating machinees, hot compression parameters, temperature is set in 150～170 ℃; Hot pressing curve adopt to divide two sections modes of boosting step by step in the section of boosting, and high pressure section pressure is controlled at 90～150bar, and first order pressure is generally 50%～70% of second section pressure, the high pressure section dwell time generally about 10S; Divide four sections releases step by step then, every section pressure reduction between 15bar～40bar; Boost and the speed precision of release is had relatively high expectations, generally be set in 0.5bar～2.5bar/s, speed difference between each section; With 8mm and 9mm soft board is example, and pressing cycle is generally 180S～225S, and the pressing cycle constant is 20～25S/mm.
Ten, cutting edge cooling: implement vertically, laterally distinguish cutting edge, cooling then with vertical cut-to-size saw and horizontal cut-to-size saw.
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| CNB2006100855202A CN100429056C (en) | 2006-06-20 | 2006-06-20 | Method for producing aldehyde-free soft board made of wheat straw |
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Cited By (10)
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| CN103568098A (en) * | 2012-08-01 | 2014-02-12 | 长沙创远环保科技有限公司 | Manufacturing method for aldehyde-free crop straw decorative plates |
| CN103770190A (en) * | 2012-10-22 | 2014-05-07 | 长沙创远环保科技有限公司 | Method for manufacturing plates through wheat straw |
| CN103770189A (en) * | 2012-10-18 | 2014-05-07 | 天津德为环保工程设备有限公司 | Method for manufacturing fiber board by utilizing straws as raw material |
| CN103878858A (en) * | 2014-03-04 | 2014-06-25 | 中国科学院宁波材料技术与工程研究所 | Method for manufacturing formaldehyde-free bamboo and wood fiberboard |
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| CN109049263A (en) * | 2018-10-18 | 2018-12-21 | 上海景新信息科技有限公司 | A kind of crops stalk mixes the manufacturing method of Formaldehyde Free Wood-based Panel processed |
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| EP1048424A3 (en) * | 1999-04-23 | 2001-01-03 | Schlingmann GmbH & Co. | Composite corkplate and method for the production thereof |
| CN1073497C (en) * | 1999-05-05 | 2001-10-24 | 陆仁书 | Middle-density fibrous board made up of wheat or rice straws and aldehyde adhesive and its making mehtod |
| CN1277095A (en) * | 2000-02-22 | 2000-12-20 | 陆仁书 | Middle-density fiber board made of isocyanic ester and wheat and rice starw, and its production process |
| CN1116152C (en) * | 2000-12-26 | 2003-07-30 | 马富生 | Densified straw board and its production process |
| JP2003311720A (en) * | 2002-04-22 | 2003-11-05 | Nippon Polyurethane Ind Co Ltd | Method for manufacture of hot-press molded board |
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| CN1785624A (en) * | 2005-10-28 | 2006-06-14 | 南京林业大学 | Industrial production method of aldehyde less thin straw board |
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| CN103568098A (en) * | 2012-08-01 | 2014-02-12 | 长沙创远环保科技有限公司 | Manufacturing method for aldehyde-free crop straw decorative plates |
| CN103770189A (en) * | 2012-10-18 | 2014-05-07 | 天津德为环保工程设备有限公司 | Method for manufacturing fiber board by utilizing straws as raw material |
| CN103770190A (en) * | 2012-10-22 | 2014-05-07 | 长沙创远环保科技有限公司 | Method for manufacturing plates through wheat straw |
| CN103878858A (en) * | 2014-03-04 | 2014-06-25 | 中国科学院宁波材料技术与工程研究所 | Method for manufacturing formaldehyde-free bamboo and wood fiberboard |
| CN108972828A (en) * | 2018-08-07 | 2018-12-11 | 宜宾学院 | A kind of biological material preparation method based on oily camphor tree leaf slag |
| CN108972828B (en) * | 2018-08-07 | 2020-07-07 | 宜宾学院 | Preparation method of biomass material based on cinnamomum longepaniculatum leaf residues |
| CN109049263A (en) * | 2018-10-18 | 2018-12-21 | 上海景新信息科技有限公司 | A kind of crops stalk mixes the manufacturing method of Formaldehyde Free Wood-based Panel processed |
| CN109093815A (en) * | 2018-10-18 | 2018-12-28 | 李�杰 | A kind of technique increasing Formaldehyde Free Wood-based Panel Prepressing intension using polyurethane stick |
| CN109227859A (en) * | 2018-10-18 | 2019-01-18 | 上海景新信息科技有限公司 | A kind of manufacturing method of cotton stalk Formaldehyde Free Wood-based Panel |
| CN109483686A (en) * | 2018-10-18 | 2019-03-19 | 上海景新信息科技有限公司 | A kind of manufacturing method of anesthesia stem Formaldehyde Free Wood-based Panel |
| CN109702845A (en) * | 2018-11-29 | 2019-05-03 | 南京林业大学 | A kind of low-density is without glue stalk board, preparation method and applications |
| CN109702845B (en) * | 2018-11-29 | 2022-03-29 | 南京林业大学 | Low-density glue-free straw board, preparation method and application thereof |
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