CN1128046C - Process for preparing middle-density rice straw board - Google Patents

Process for preparing middle-density rice straw board Download PDF

Info

Publication number
CN1128046C
CN1128046C CN 01137361 CN01137361A CN1128046C CN 1128046 C CN1128046 C CN 1128046C CN 01137361 CN01137361 CN 01137361 CN 01137361 A CN01137361 A CN 01137361A CN 1128046 C CN1128046 C CN 1128046C
Authority
CN
China
Prior art keywords
straw
hot pressing
density
crushed aggregates
orders
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 01137361
Other languages
Chinese (zh)
Other versions
CN1356202A (en
Inventor
周定国
于文杰
张洋
邹夏享
华毓坤
邱儒杰
徐咏兰
梅长彤
周晓燕
徐信武
章先平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing Forestry University
Original Assignee
Nanjing Forestry University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nanjing Forestry University filed Critical Nanjing Forestry University
Priority to CN 01137361 priority Critical patent/CN1128046C/en
Publication of CN1356202A publication Critical patent/CN1356202A/en
Application granted granted Critical
Publication of CN1128046C publication Critical patent/CN1128046C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Fodder In General (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Abstract

The present invention relates to a production method for producing and processing a medium-density strawboard, which comprises the following technical steps: (1), material preparation: straw is cut into stalk units of 30 to 50mm; scrap leaves, mud, etc. are sieved and removed; the straw which is crushed by a crusher and is mechanically sieved is divided into coarse materials and fine materials; (2), drying: the drying temperature is from 100 to 150DEG C, and the water ratio reaches 3% to 10%. (3), separation: the materials are separated by a rotary sieve, the fine materials are transported to a material storehouse of a surface layer, and the coarse materials are transported to a material storehouse of a core layer; (4), glue blending: glue is blended in a circular type glue blending machine, and isocyanate is used as an adhesive; (5), paving: an airflow type paving machine is used, and the thickness of a paved board blank is 8 to 15 times of the thickness of a medium-density strawboard of a finished product; (6), heat press: the hot pressing temperature is from 140 to 170 DEG C, the hot pressing time is from 0.5 to 0.8 min/mm, and the hot pressing pressure is from 2.5 to 3.0Mpa; (7), post-treatment: the board blank carries out the steps of cooling, edge trimming, stacking and sanding. The present invention has the advantage that the rationality of the shape of the straw scraps is ensured by the device modification of the wooden shaving board and three times of sieving. The medium-density strawboard is prepared under the condition of high utilization rate of raw materials, and the main physical mechanical property indexes of the medium-density strawboard reach the requirements of a wooden medium-density fiberboard.

Description

The production method of median density straw board
Technical field
What the present invention relates to is a kind of production method of production and processing median density straw board, belongs to medium-density plate material technical field.
Background technology
At present, the main production technology of compressed straw slab is the production technology of copying wooden flake board, and the product of producing only reaches the requirement of particieboard product.If with density rice straw fibreboard in the straw raw material production, then the yield of fiber is lower, and cost is improved, be difficult to and the competition of wooden medium density fibre board (MDF).
Summary of the invention
The objective of the invention is to the defective at above-mentioned existence, the production method of new median density straw board produces median density straw board, and its Main physical mechanical performance index has reached the requirement of wooden medium density fibre board (MDF).Technical solution of the present invention: the preparation of its processing step branch (1) crushed aggregates of straw: the stalk unit that 1. straw is cut into 30-50mm, impurity such as the broken leaf in the screening removal raw material, silt particle, 2. the stalk unit after the screening is through crusher in crushing, 3. the crushed aggregates of straw after the fragmentation screens through mechanical type again, 8 orders, 20 orders, 100 mesh sieves are told thick, fines second gear, wherein 8 orders<coarse fodder<20 orders, 2. 4. 20 orders<fines<100 orders will turn back to greater than 8 purpose crushed aggregates of straw; (2) drying: thick, thin crushed aggregates of straw is adopted rotator type drying machine drying, and baking temperature is 100-150 ℃, makes the moisture content of crushed aggregates of straw reach 3%-10%; (3) sorting: dried crushed aggregates of straw carries out sorting with roto-siofter again, makes fines send into the top layer feed bin, and coarse fodder then enters the sandwich layer feed bin; (4) glue mixing: glue mixing in ring type glue mixer (prior art) is an adhesive with isocyanates, and the resin added top layer is 5-6%, sandwich layer is 4-5%, will add waterproofing agent during applying glue, and waterproofing agent accounts for the 0.5-1% of crushed aggregates of straw weight, applying glue is even, and the crushed aggregates of straw moisture content of mixing glue is 8-16%; (5) mat formation: use the air-flowing type spreading machine, control the uniformity of slab density well, the slab thickness after mating formation be finished product median density straw board thickness 8-15 doubly; (6) hot pressing: press adopts the hot press of single or multiple lift form, need take to prevent the measure of haftplatte before the hot pressing, as using releasing agent, processing release paper or demoulding backing plate, hot pressing temperature is 140-170 ℃, hot pressing time is 0.5-0.8min/mm, and hot pressing pressure is 2.5-3.0Mpa; (7) post-processed: the sheet material after the hot pressing cools off at normal temperatures, and cutting edge becomes the plate face specification of standard then, and book size is 1220mm * 2440mm, and stacking carries out sanding after 48 hours.Advantage of the present invention: by scrap build to wooden flake board, by three screenings, guaranteed the reasonability of crushed aggregates of straw form, under the raw material availability condition with higher, produce median density straw board, its Main physical mechanical performance index has reached the requirement of wooden medium density fibre board (MDF).
Embodiment 1
The preparation of crushed aggregates of straw, claim straw raw material 500kg, 1. straw is cut into the stalk unit of 30mm, impurity such as the broken leaf in the screening removal raw material, silt particle, 2. the stalk unit after the screening is through crusher in crushing, 3. the crushed aggregates of straw after the fragmentation screens through mechanical type again, 8 orders, 20 orders, 100 mesh sieves are told thick, fines second gear, wherein 8 orders<coarse fodder<20 orders, 2. 4. 20 orders<fines<100 orders will turn back to greater than 8 purpose crushed aggregates of straw; Get thick, thin each 100kg of crushed aggregates of straw and adopt the rotator type drying machine, baking temperature is got 100 ℃, makes crushed aggregates of straw moisture content 4%, in order to guarantee product fine and smooth surface is arranged, must make has a certain amount of fines in the raw material, top layer fines and its glue consumption of sandwich layer coarse fodder are inequality.So, to dried raw material show, sandwich layer separately is necessary.Adopt roto-siofter to carry out sorting, make fines send into the top layer feed bin, coarse fodder then enters the sandwich layer feed bin.Adopting homemade isocyanates is adhesive, and the resin added top layer is 6kg, and sandwich layer is 4.5kg, adds the waterproofing agent of 0.5kg during applying glue.Applying glue is finished in the ring type glue mixer.Even in order to ensure applying glue, the consumption proportioning that should guarantee adhesive and crushed aggregates of straw is a constant constant, making the raw material moisture content of mixing glue is 8%, the crushed aggregates of straw of mixing glue is with existing air-flowing type spreading machine, because crushed aggregates of straw density is lower, must control the uniformity of slab density well.Slab thickness after mating formation is 10cm, through precompressed, can reduce the thickness of slab, but improve the quality of slab, has also avoided the breakage in the transportation.Hot press adopts form of single sheet, uses releasing agent before hot pressing, for preventing haftplatte.160 ℃ of hot pressing temperatures, hot pressing time are 0.5min/mm, and hot pressing pressure is 2.5MPa.The sheet material of finishing after the hot pressing is placed on cooling under the normal temperature, and cooling purpose is that the temperature of sheet material is reduced, and eliminates the plate internal stress, prevents the plank distortion.Cooling back cutting edge, book size is 1220mm * 2440mm, the plate face specification of standard, stacking carried out sanding in 48 hours.
Embodiment 2
The preparation of crushed aggregates of straw, claim straw raw material 500kg, 1. straw is cut into the stalk unit of 50mm, impurity such as the broken leaf in the screening removal raw material, silt particle, 2. the stalk unit after the screening is through crusher in crushing, 3. the crushed aggregates of straw after the fragmentation screens through mechanical type again, 8 orders, 20 orders, 100 mesh sieves are told thick, fines second gear, wherein 8 orders<coarse fodder<20 orders, 2. 4. 20 orders<fines<100 orders will turn back to greater than 8 purpose crushed aggregates of straw; Get thick, thin each 100kg of crushed aggregates of straw and adopt the rotator type drying machine, baking temperature is got 100 ℃, makes crushed aggregates of straw moisture content 10%, in order to guarantee product fine and smooth surface is arranged, must make has a certain amount of fines in the raw material, top layer fines and its glue consumption of sandwich layer coarse fodder are inequality.So, to dried crushed aggregates of straw show, sandwich layer separately is necessary.Adopt roto-siofter to carry out sorting, make fines send into the top layer feed bin, coarse fodder then enters the sandwich layer feed bin.Adopting homemade isocyanates is adhesive, and the resin added top layer is 5kg, and sandwich layer is 5kg, adds the waterproofing agent of 1kg during applying glue.Applying glue is finished in the ring type glue mixer.Even in order to ensure applying glue, the consumption proportioning that should guarantee adhesive and crushed aggregates of straw is a constant constant, the raw material moisture content of mixing glue is 16%, and the raw material of mixing glue is with existing air-flowing type spreading machine, because crushed aggregates of straw density is lower, must control the uniformity of slab density well, slab thickness after mating formation is 13cm, through precompressed, can reduce the thickness of slab, but it has improved the quality of slab, has also avoided the breakage in the transportation.Adopt the hot press of double-deck form, before hot pressing, use demoulding backing plate, prevent haftplatte.170 ℃ of hot pressing temperatures, hot pressing time are 0.8min/mm, and hot pressing pressure is 3MPa.The sheet material of finishing after the hot pressing is placed on cooling under the normal temperature, and cooling purpose is that the temperature of sheet material is reduced, and eliminates the plate internal stress, prevents the plank distortion.Cooling back cutting edge, book size is 1220mm * 2440mm, the plate face specification of standard, stacking carried out sanding in 50 hours.The present invention produces median density straw board, detect through State Administration of Forestry's Nanjing wood-based plate quality monitoring testing station, density variation, moisture content, internal bond strength, MOR, elastic modelling quantity in its plate, hold the requirement that screw power all reaches indoor template in the GB/T11718-1999 standard, burst size of methanal reaches the requirement of A level in the GB/T11718-1999 standard, and the specific performance index is as follows:
Density 800-880kg/cm 3
Density variation in the plate+3.4 ,-2.2
Moisture content 4.1%
Internal bond strength 0.57MPa
MOR 28.5MPa
Elastic modelling quantity 2999MPa
Hold screw power (N) plate face 1570 edges of boards 1260
Burst size of methanal 1.7mg/100g

Claims (1)

1, the production method of median density straw board, it is characterized in that the preparation of its processing step branch (1) crushed aggregates of straw: the stalk unit that 1. straw is cut into 30-50mm, impurity such as the broken leaf in the screening removal raw material, silt particle, 2. the stalk unit after the screening is through crusher in crushing, 3. the crushed aggregates of straw after the fragmentation screens through mechanical type again, 8 orders, 20 orders, 100 mesh sieves, tell thick, fines second gear, 8 orders<coarse fodder<20 orders wherein, 2. 4. 20 orders<fines<100 orders will turn back to greater than 8 purpose crushed aggregates of straw; (2) drying: thick, thin crushed aggregates of straw is adopted rotator type drying machine drying, and baking temperature is 100-150 ℃, makes the moisture content of crushed aggregates of straw reach 3%-10%; (3) sorting: dried crushed aggregates of straw carries out sorting with roto-siofter again, makes fines send into the top layer feed bin, and coarse fodder then enters the sandwich layer feed bin; (4) glue mixing: glue mixing in the ring type glue mixer is an adhesive with isocyanates, and the resin added top layer is 5-6%, sandwich layer is 4-5%, will add waterproofing agent during applying glue, and waterproofing agent accounts for the 0.5-1% of crushed aggregates of straw weight, applying glue is even, and the crushed aggregates of straw moisture content of mixing glue is 8-16%; (5) mat formation: use the air-flowing type spreading machine, control the uniformity of slab density well, the slab thickness after mating formation be finished product median density straw board thickness 8-15 doubly; (6) hot pressing: press adopts the hot press of single or multiple lift form, need take to prevent the measure of haftplatte before the hot pressing, as using releasing agent, processing release paper or demoulding backing plate, hot pressing temperature is 140-170 ℃, hot pressing time is 0.5-0.8min/mm, and hot pressing pressure is 2.5-3.0Mpa; (7) post-processed: the sheet material after the hot pressing cools off at normal temperatures, and cutting edge becomes the plate face specification of standard then, and book size is 1220mm * 2440mm, and stacking carries out sanding after 48 hours.
CN 01137361 2001-12-11 2001-12-11 Process for preparing middle-density rice straw board Expired - Fee Related CN1128046C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 01137361 CN1128046C (en) 2001-12-11 2001-12-11 Process for preparing middle-density rice straw board

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 01137361 CN1128046C (en) 2001-12-11 2001-12-11 Process for preparing middle-density rice straw board

Publications (2)

Publication Number Publication Date
CN1356202A CN1356202A (en) 2002-07-03
CN1128046C true CN1128046C (en) 2003-11-19

Family

ID=4674164

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 01137361 Expired - Fee Related CN1128046C (en) 2001-12-11 2001-12-11 Process for preparing middle-density rice straw board

Country Status (1)

Country Link
CN (1) CN1128046C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100345668C (en) * 2004-12-14 2007-10-31 郎妙金 Bamboo-wood composite section bar production method
CN100364736C (en) * 2005-06-20 2008-01-30 南京林业大学 Industralized production and manufacture method for rice straw hollow flakeboard

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1323819C (en) * 2004-12-13 2007-07-04 东南大学 Artificial board of straw non-wood plant fibre and its preparation process
CN1325570C (en) * 2004-12-13 2007-07-11 东南大学 Compostte artificial board and its preparation method
CN100333884C (en) * 2005-01-05 2007-08-29 南京林业大学 Combined adhesive mixing method suitable for production of plates from wheat or rice stalks
CN100400254C (en) * 2006-07-13 2008-07-09 万华生态板业股份有限公司 Method for producing plate using crop straw
CN101058207B (en) * 2007-05-24 2011-01-26 石家庄铁道学院 Maize stalk and/or wheat stalk composite board and its manufacturing method
CN101100085B (en) * 2007-07-23 2010-04-21 信阳木工机械有限责任公司 Method for manufacturing artificial board with mixed crop stalk and wood
CN101244580B (en) * 2008-02-26 2010-12-15 南京林业大学 Method for producing antennaria dioica flakeboard
CN101966717A (en) * 2010-09-28 2011-02-09 杨廷 High-temperature compressed stalk plate, manufacturing method and special high-temperature compression equipment
CN103406971B (en) * 2013-07-16 2015-05-06 福建农林大学 Banana stalk particleboard and manufacturing method thereof
CN103950085B (en) * 2013-08-05 2016-06-22 西南林业大学 A kind of particieboard moisture gradient construction method
CN104416643A (en) * 2013-08-21 2015-03-18 山东华鑫资源环保科技开发有限公司 Density board and manufacture method thereof
CN104416642A (en) * 2013-09-03 2015-03-18 湖南旺正新材料有限公司 Artificial board manufactured by taking waste building templates as raw material and manufacturing method thereof
CN104029271B (en) * 2014-06-26 2016-05-18 绥阳兴翰轮盘制造有限公司 A kind of processing method of sorghum stalk particieboard
CN104070591B (en) * 2014-07-09 2016-11-23 万华生态板业研究设计(烟台)有限公司 Straw-based panel and production method thereof
CN104385424A (en) * 2014-09-23 2015-03-04 万华生态板业研究设计(烟台)有限公司 Crop straw manmade board and production method thereof
CN104827544B (en) * 2015-01-30 2017-05-17 董彬 Preparation method of aldehyde-free and poison-free fireproof artificial board
CN104985667A (en) * 2015-06-25 2015-10-21 大连金州重型机器集团有限公司 Extrusion forming method for man-made straw panel
CN105058835B (en) * 2015-07-20 2017-07-04 南京林业大学 A kind of use stalk material manufactures the technique and its mould of furniture shaped component
CN105773784A (en) * 2016-04-29 2016-07-20 安徽农业大学 Thin type moisture-proof medium-density fiberboard and preparation method thereof
CN107553658A (en) * 2016-06-30 2018-01-09 张家港保税区鑫和成国际贸易有限公司 String board production technology
CN106313263A (en) * 2016-09-09 2017-01-11 万华生态板业股份有限公司 Production method of avoiding heating platen adhesion in straw plate production
CN107932673B (en) * 2017-11-27 2020-01-07 万华生态板业(信阳)有限公司 Manufacturing method of straw shaving board and straw shaving board
CN107984592A (en) * 2017-11-27 2018-05-04 万华生态板业(信阳)有限公司 The manufacture method and stalk-shaving board of stalk-shaving board
CN108214803A (en) * 2017-12-28 2018-06-29 万华生态板业(信阳)有限公司 The manufacturing method and wood-based plate of wood-based plate
CN109049171A (en) * 2018-07-27 2018-12-21 绍兴臣工新材料科技有限公司 A kind of orientation wheat straw board and preparation method thereof
CN111590711B (en) * 2020-06-01 2023-05-02 万华禾香集团有限公司 Method for processing fiber board and crushing and sorting device for the same
CN113232116A (en) * 2021-03-26 2021-08-10 中国科学院南京土壤研究所 Method for manufacturing ecological plate by utilizing polluted soil restoration plants

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100345668C (en) * 2004-12-14 2007-10-31 郎妙金 Bamboo-wood composite section bar production method
CN100364736C (en) * 2005-06-20 2008-01-30 南京林业大学 Industralized production and manufacture method for rice straw hollow flakeboard

Also Published As

Publication number Publication date
CN1356202A (en) 2002-07-03

Similar Documents

Publication Publication Date Title
CN1128046C (en) Process for preparing middle-density rice straw board
CN100486786C (en) Manufacturing method of wood/hybrid Chinese pennisetum composite artificial board
CN101148056A (en) Formaldehyde-less composite stalk board production technology method and use
CN1785624A (en) Industrial production method of aldehyde less thin straw board
CN105437327B (en) A kind of moistureproof, mould proof, low formaldehyde type middle and higher density fiberboard preparation method
CN1631632A (en) Industrialized production method of wheat straw flakeboard
AU697635B2 (en) Process for the manufacture of shaped articles and product prepared therefrom
CN101642925B (en) Urea formaldehyde resin adhesive medium density fiber board utilizing castor bean stalk as raw material
CN100381263C (en) Method for making castor stalk chipboard
CN108015876A (en) A kind of production method of particieboard
CN106182328A (en) Twice sieve method removes the method that the bark in full Eucalyptus leftover pieces produces particieboard
CN114434585B (en) Production process and processing equipment of bamboo shaving board with high static bending strength
CA2528219A1 (en) Plate of wood material and method for the manufacture of the plate
TW200808509A (en) Method for manufacturing straw boards
CN103203790A (en) Method for producing fiberboard by utilizing cementing property of straw fibers
CN1843719A (en) Method for manufacturing tile by rice/wheat straw
CN210308304U (en) But veneer multilayer structure shaving board production system
CN111605025B (en) Shaving board production method and shaving board
CN107891502A (en) It is a kind of using waste polyurethane liquefied substance as adhesive without aldehyde particieboard and preparation method thereof
CN1803422A (en) Novel composite environment-friendly sheet production method and its product
EP1159114B1 (en) Method of producing panel-shaped products
CN101745964A (en) Technology for manufacturing glulam
CN108214807A (en) A kind of production method of no aldehyde particieboard
CN209812620U (en) Aldehyde-free wood shaving board production system
CN101670604A (en) Processing technology for manufacturing board by utilizing crop straws

Legal Events

Date Code Title Description
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C06 Publication
PB01 Publication
C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20031119

Termination date: 20101211