CN106313266A - Manufacturing method of 15 mm medium density fiberboard - Google Patents

Manufacturing method of 15 mm medium density fiberboard Download PDF

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Publication number
CN106313266A
CN106313266A CN201610738069.3A CN201610738069A CN106313266A CN 106313266 A CN106313266 A CN 106313266A CN 201610738069 A CN201610738069 A CN 201610738069A CN 106313266 A CN106313266 A CN 106313266A
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CN
China
Prior art keywords
hot pressing
under conditions
medium density
depressurized
grades
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Pending
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CN201610738069.3A
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Chinese (zh)
Inventor
利子雷
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Guangxi Ltd By Share Ltd
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Guangxi Ltd By Share Ltd
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Priority to CN201610738069.3A priority Critical patent/CN106313266A/en
Publication of CN106313266A publication Critical patent/CN106313266A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing
    • B27N3/10—Moulding of mats
    • B27N3/12—Moulding of mats from fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N1/00—Pretreatment of moulding material
    • B27N1/02—Mixing the material with binding agent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing
    • B27N3/18—Auxiliary operations, e.g. preheating, humidifying, cutting-off

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Abstract

The invention discloses a manufacturing method of a 15 mm medium density fiberboard. The manufacturing method comprises the following steps: step 1, mixing: mixing and drying raw materials to obtain a wood fiber mixture with the moisture content of 7-9%, wherein the raw materials comprise 90-95 parts by weight of wood fibers and 4-6 parts by weight of urea resin, and the wood fibers contain 26-36% of bark; step 2, pre-pressing: pre-pressing to shape the wood fiber mixture at 1-2 MPa; and step 3, hot-pressing: performing nine-stage hot-pressing. The invention aims to provide the manufacturing method of the 15 mm medium density fiberboard. The medium density fiberboard manufactured by the method has good static bending intensity and elasticity modulus.

Description

A kind of preparation method of 15mm medium density fibre board (MDF)
Technical field
The present invention relates to wood-based plate field, the preparation method of a kind of 15mm medium density fibre board (MDF).
Background technology
The MOR of wood-based plate, elastic modelling quantity are by raw-material impact, generally, and content of bark in raw material The highest, its performance is the poorest.But raw-material content of bark is the highest, and price is the lowest.
Therefore, for the angle reducing cost, the performance how improving the wood-based plate prepared by the raw material that grade is low is The problem that those skilled in the art need to consider.
Summary of the invention
It is an object of the invention to propose the preparation method of a kind of 15mm medium density fibre board (MDF), during the method prepares Density fiber board has preferable MOR, elastic modelling quantity.
The concrete technical scheme of the present invention is: the preparation method of a kind of 15mm medium density fibre board (MDF), comprises the following steps:
Step 1: mixing, obtains the lignocellulosic mixture of moisture content 7-9% by raw material combination drying；Wherein, described Raw material includes the wood fibre of 90-95 weight portion, the Lauxite of 4-6 weight portion, containing 26-36% in described wood fibre Bark；
Step 2: precompressed, by lignocellulosic mixture pre-molding under the conditions of 1-2MPa；
Step 3: hot pressing, hot pressing is divided into following steps to carry out:
S31: one-level hot pressing, 210kg/cm2Under conditions of hot pressing 6s, be then depressurized to 80kg/cm in 1-2s2；
S32: two grades of hot pressing, 80kg/cm2Under conditions of hot pressing 3s, be then depressurized to 60kg/cm in 1s2；
S33: three grades of hot pressing, 60kg/cm2Under conditions of hot pressing 3s, be then depressurized to 25-35kg/cm in 1-2s2；
S34: level Four hot pressing, 25-35kg/cm2Under conditions of hot pressing 110s, then boost to 45-50kg/cm in 1-2s2；
S35: Pyatyi hot pressing, 45-50kg/cm2Under conditions of hot pressing 25s, then boost to 80-100kg/cm in 1-2s2
S36: six grades of hot pressing, 80-100kg/cm2Under conditions of hot pressing 45s, be then depressurized to 60kg/cm in 2s2；
S37: seven grades of hot pressing, 60kg/cm2Under conditions of hot pressing 6s, be then depressurized to 40kg/cm in 1-2s2；
S38: eight grades of hot pressing, 40kg/cm2Under conditions of hot pressing 8s, be then depressurized to 20kg/cm in 1s2；
S39: nine grades of hot pressing, 20kg/cm2Under conditions of hot pressing 2s, hot pressing terminates and get final product；
The hot pressing temperature of S31-S39 is 170-190 DEG C.
Wood fibre in the present invention can be chosen as larch, hardwood or Eucalyptus.
In the preparation method of above-mentioned 15mm medium density fibre board (MDF), in described wood fibre, the 20 above fibers of mesh account for 30-35%；20-40 mesh fiber accounts for 20-25%；40-60 mesh fiber accounts for 20-25%；Remaining is the fiber of below 60 mesh.
In the preparation method of above-mentioned 15mm medium density fibre board (MDF), the moisture content of described 15mm medium density fibre board (MDF) is 5.5-6%.
In the preparation method of above-mentioned 15mm medium density fibre board (MDF), described Lauxite pH value is 7-8, and viscosity is being coated with 4-cup, is 20s under conditions of 25 DEG C, solid content 54-56%, hardening time 54-56s.
Compared with prior art, the beneficial effects of the present invention is:
The 15mm medium density fibre board (MDF) MOR of the present invention is 24Mpa, elastic modelling quantity 2100.
Detailed description of the invention
Below in conjunction with detailed description of the invention, technical scheme is described in further detail, but do not constitute right Any restriction of the present invention.
Embodiment 1
The preparation method of a kind of 15mm medium density fibre board (MDF), comprises the following steps:
Step 1: mixing, obtains the lignocellulosic mixture of moisture content 7-9% by raw material combination drying；Wherein, described Raw material includes the wood fibre of 90-95 weight portion, the Lauxite of 4-6 weight portion, containing 26-36% in described wood fibre Bark；In described wood fibre, the 20 above fibers of mesh account for 30-35%；20-40 mesh fiber accounts for 20-25%；40-60 mesh fiber Accounting for 20-25%, this wood fibre is larch；Remaining is the fiber of below 60 mesh, and described Lauxite pH value is 7.5, Viscosity be coated with 4-cup, be 20s under conditions of 25 DEG C, solid content 55%, hardening time 55s.
Step 2: precompressed, by lignocellulosic mixture pre-molding under the conditions of 1-2MPa；
Step 3: hot pressing, hot pressing is divided into following steps to carry out:
S31: one-level hot pressing, 210kg/cm2Under conditions of hot pressing 6s, be then depressurized to 80kg/cm in 1-2s2；
S32: two grades of hot pressing, 80kg/cm2Under conditions of hot pressing 3s, be then depressurized to 60kg/cm in 1s2；
S33: three grades of hot pressing, 60kg/cm2Under conditions of hot pressing 3s, be then depressurized to 25-35kg/cm in 1-2s2；
S34: level Four hot pressing, 25-35kg/cm2Under conditions of hot pressing 110s, then boost to 45-50kg/cm in 1-2s2；
S35: Pyatyi hot pressing, 45-50kg/cm2Under conditions of hot pressing 25s, then boost to 80-100kg/cm in 1-2s2
S36: six grades of hot pressing, 80-100kg/cm2Under conditions of hot pressing 45s, be then depressurized to 60kg/cm in 2s2；
S37: seven grades of hot pressing, 60kg/cm2Under conditions of hot pressing 6s, be then depressurized to 40kg/cm in 1-2s2；
S38: eight grades of hot pressing, 40kg/cm2Under conditions of hot pressing 8s, be then depressurized to 20kg/cm in 1s2；
S39: nine grades of hot pressing, 20kg/cm2Under conditions of hot pressing 2s, hot pressing terminates and get final product；
The hot pressing temperature of S31-S39 is 170-190 DEG C.
The moisture content of described 15mm medium density fibre board (MDF) is 5.8%.
Comparative example 1
Raw material composition is substantially the same with embodiment 1, and different places is, the wood fibre in raw material does not contains bark, heat Pressure technique is different, under the conditions of the heat pressing process of this comparative example is 170-190 DEG C, and hot pressing 7min under conditions of 3.5Mpa.
Comparative example 2
Raw material composition is same as in Example 1, and different places is, heat pressing process is different, the heat pressing process of this comparative example Under the conditions of 170-190 DEG C, hot pressing 7min under conditions of 3.5Mpa.
The 15mm medium density fibre board (MDF) MOR in the dry state of the present embodiment is 24Mpa, elastic modelling quantity 2100；
The 15mm medium density fibre board (MDF) MOR in the dry state of comparative example 1 is 22Mpa, elastic modelling quantity 2300；
The 15mm medium density fibre board (MDF) MOR in the dry state of comparative example 2 is 20Mpa, elastic modelling quantity 2500；
Under drying regime, MOR, elastic modelling quantity detection method are with reference to GB/T11718-2009.
Above-described be only presently preferred embodiments of the present invention, all made in the range of the spirit and principles in the present invention appoint What amendment, equivalent and improvement etc., should be included within the scope of the present invention.

Claims (4)

1. the preparation method of a 15mm medium density fibre board (MDF), it is characterised in that comprise the following steps:
Step 1: mixing, obtains the lignocellulosic mixture of moisture content 7-9% by raw material combination drying；Wherein, described raw material Including wood fibre, the Lauxite of 4-6 weight portion of 90-95 weight portion, described wood fibre contains the tree of 26-36% Skin；
Step 2: precompressed, by lignocellulosic mixture pre-molding under the conditions of 1-2MPa；
Step 3: hot pressing, hot pressing is divided into following steps to carry out:
S31: one-level hot pressing, 210kg/cm2Under conditions of hot pressing 6s, be then depressurized to 80kg/cm in 1-2s2；
S32: two grades of hot pressing, 80kg/cm2Under conditions of hot pressing 3s, be then depressurized to 60kg/cm in 1s2；
S33: three grades of hot pressing, 60kg/cm2Under conditions of hot pressing 3s, be then depressurized to 25-35kg/cm in 1-2s2；
S34: level Four hot pressing, 25-35kg/cm2Under conditions of hot pressing 110s, then boost to 45-50kg/cm in 1-2s2；
S35: Pyatyi hot pressing, 45-50kg/cm2Under conditions of hot pressing 25s, then boost to 80-100kg/cm in 1-2s2
S36: six grades of hot pressing, 80-100kg/cm2Under conditions of hot pressing 45s, be then depressurized to 60kg/cm in 2s2；
S37: seven grades of hot pressing, 60kg/cm2Under conditions of hot pressing 6s, be then depressurized to 40kg/cm in 1-2s2；
S38: eight grades of hot pressing, 40kg/cm2Under conditions of hot pressing 8s, be then depressurized to 20kg/cm in 1s2；
S39: nine grades of hot pressing, 20kg/cm2Under conditions of hot pressing 2s, hot pressing terminates and get final product；
The hot pressing temperature of S31-S39 is 170-190 DEG C.
The preparation method of 15mm medium density fibre board (MDF) the most according to claim 1, it is characterised in that described wood fibre In the 20 above fibers of mesh account for 30-35%；20-40 mesh fiber accounts for 20-25%；40-60 mesh fiber accounts for 20-25%；Remaining is 60 Fiber below mesh.
The preparation method of 15mm medium density fibre board (MDF) the most according to claim 2, it is characterised in that close in described 15mm The moisture content of degree fibre board is 5.5-6%.
The preparation method of 15mm medium density fibre board (MDF) the most according to claim 1, it is characterised in that described Lauxite PH value is 7-8, viscosity be coated with 4-cup, be 20s under conditions of 25 DEG C, solid content 54-56%, hardening time 54-56s.
CN201610738069.3A 2016-08-26 2016-08-26 Manufacturing method of 15 mm medium density fiberboard Pending CN106313266A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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CN106313266A true CN106313266A (en) 2017-01-11

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1044113A (en) * 1996-05-31 1998-02-17 Yamaha Corp Manufacture of ligneous board
DE19632997A1 (en) * 1996-08-16 1998-02-19 Siempelkamp Gmbh & Co Parallel sided timber strands for use in manufacture of composite beams
JPH10119014A (en) * 1996-10-16 1998-05-12 Kanegafuchi Chem Ind Co Ltd Manufacture of fiber board
CN1425541A (en) * 2001-12-14 2003-06-25 株式会社瑞可 Medium density flame-retardant fibrous plate and its producing method
CN1947976A (en) * 2006-10-30 2007-04-18 叶吉明 Hot pressing technique for producing medium density fibreboard
CN102001121A (en) * 2010-10-20 2011-04-06 饶显生 Method for producing bark mixed medium-density fiber plate
CN102407553A (en) * 2010-09-21 2012-04-11 大亚科技股份有限公司 Manufacturing method of high density fiberboard for whitened type E1 grade floor substrate
CN105349093A (en) * 2015-12-25 2016-02-24 广西丰林木业集团股份有限公司 Soybean meal-based adhesive for fiber boards and synthetic method

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1044113A (en) * 1996-05-31 1998-02-17 Yamaha Corp Manufacture of ligneous board
DE19632997A1 (en) * 1996-08-16 1998-02-19 Siempelkamp Gmbh & Co Parallel sided timber strands for use in manufacture of composite beams
JPH10119014A (en) * 1996-10-16 1998-05-12 Kanegafuchi Chem Ind Co Ltd Manufacture of fiber board
CN1425541A (en) * 2001-12-14 2003-06-25 株式会社瑞可 Medium density flame-retardant fibrous plate and its producing method
CN1947976A (en) * 2006-10-30 2007-04-18 叶吉明 Hot pressing technique for producing medium density fibreboard
CN102407553A (en) * 2010-09-21 2012-04-11 大亚科技股份有限公司 Manufacturing method of high density fiberboard for whitened type E1 grade floor substrate
CN102001121A (en) * 2010-10-20 2011-04-06 饶显生 Method for producing bark mixed medium-density fiber plate
CN105349093A (en) * 2015-12-25 2016-02-24 广西丰林木业集团股份有限公司 Soybean meal-based adhesive for fiber boards and synthetic method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
李绍昆: "《中密度纤维板多层热压机的热压过程分析》", 《中国人造板》 *

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