CN101264614A - Wood veneer for container bottom board and producing method thereof - Google Patents

Wood veneer for container bottom board and producing method thereof Download PDF

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Publication number
CN101264614A
CN101264614A CNA2007100870438A CN200710087043A CN101264614A CN 101264614 A CN101264614 A CN 101264614A CN A2007100870438 A CNA2007100870438 A CN A2007100870438A CN 200710087043 A CN200710087043 A CN 200710087043A CN 101264614 A CN101264614 A CN 101264614A
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CN
China
Prior art keywords
temperature
board
pressure
container
plate
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CNA2007100870438A
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Chinese (zh)
Inventor
李洁
赵显劲
曾庆祝
陈振耀
张益民
郑根期
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湖北康欣木制品有限公司
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Priority to CNA2007100870438A priority Critical patent/CN101264614A/en
Publication of CN101264614A publication Critical patent/CN101264614A/en

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Abstract

The invention relates to a plywood used on the container floorings, which is characterized in that a plurality of laminated boards are arranged symmetrically, three longitudinal core boards are used as veneers, and a plurality of transverse core boards and the longitudinal core boards are alternatively arranged; the transverse core boards are made of aspen wood. The invention also discloses a manufacturing method for the plywood used in the container floorings, which comprises the following steps: making the aspen wood into core boards, applying glue on the core boards, assembly, prepressing and forming, secondary assembly, hot pressing, sawing, and chamber processing; wherein, the hot pressing technique is carried out as follows: under the pressure of 2.6-2.7 mpa and at the temperature of 130-140 DEG C, the boards are fed below 80 DEG C, and the temperature as well as the pressure are increased in the meanwhile; when the temperature quickly reaches 130 DEG C, time keeping is begun and lasts for 35 minutes, in which the temperature and the pressure remain constant; when the temperature reaches 140 DEG C, a steam inlet valve is closed, and the temperature is maintained at approximately 140 DEG C, then hot pressing is conducted for 20 minutes before stopping stamping; 35 minutes later, the steam is discharged, and the pressure is reduced section by section; after that, cooling is performed by introducing water, the pressure and temperature fall naturally, and when the temperature drops to 90 DEG C, a water inlet valve is closed; subsequently, the pressure is lowered to 0.8-1.1 mpa, the temperature and pressure are reduced naturally on a regular basis, when the temperature is lowered to 70-80 DEG C, the boards are ejected out by means of pressure relief; the overall cooling time should exceed 20 minutes.

Description

A kind of composite board for bottom board of container and production method thereof

Technical field

The invention belongs to a kind of composite board for bottom board of container and production method thereof, particularly a kind of composite board for bottom board of container and production method thereof of producing with poplar.

Background technology

Container is formed by steel plate, paint with as the shockproof base plate-thick glued board of buffering, owing to container bottom board mainly is same as transportation, must have good antidetonation, shock-resistant, weatherability, performance such as ageing-resistant.Therefore, except apparent size, very high requirement has been proposed physical properties such as the glue of the glued board that is used for container bottom board and durability, MOR, elastic modelling quantity.For satisfying the requirement of product physical performance index, it is raw material that container is generally selected the high density rigid broad-leaved wood for use with timber apron, because the growth cycle of such seeds is long, generally about 100 years, and human wants day by day increases, and causes worldwide hard broad-leaved wood resource sharply to reduce.In order to seek alternative raw material, people have done a large amount of work, proposing with the eucalyptus as Chinese patent application 02271498.7 and 02134300.4 is that main raw material(s) is produced composite board for bottom board of container, and 94218435.1 and 94114944.7 propositions are that raw material is produced composite board for bottom board of container with the bamboo wood.

Eucalyptus is grown in the torrid zone, subtropical zone, and as in China South China establishing in large scale being arranged, northern area should not be planted, so its source still is restricted.Bamboo wood also is in the southern area growth, and because it belongs to the path material, bamboo wood is made the bamboo veneer need carry out loaded down with trivial details braiding or concatenation.

Summary of the invention

The objective of the invention is to overcome the deficiencies in the prior art part, the quick-growing plantation material-poplar production composite board for bottom board of container of the national large-scale popularization of a kind of usefulness and the production method of this glued board are provided.

Technical scheme of the present invention is: a kind of composite board for bottom board of container, laminate are symmetric arrangement, and the facing plate is three layers of vertical central layer, and horizontal central layer arranges alternately that with vertical central layer described horizontal central layer is the poplar plate between the facing plate.

Described vertical central layer is a kind of in poplar plate, clone wood, bamboo wood, Eucalyptus plate, larch plank and the birch plate.

The centre of described base plate is provided with three layers of vertical central layer.

The facing plate of described base plate is a kind of in painting layer, clone plank, bamboo mat, the tectorial paper.

The present invention also provides a kind of production method of composite board for bottom board of container, this method comprises makes central layer, central layer gluing, assembly, pre-molding, secondary assembly, hot pressing, sawing, chamfered step with poplar, it is characterized in that said heat pressing process is:

Pressure 2.6-2.7mpa, temperature 130-140 ℃, advance plate below 80 ℃, while increasing temperature and pressure, timing when temperature reaches 130 ℃ fast, 35 minutes heat-insulation pressure keepings, close admission valve when temperature reaches 140 ℃, maintain the temperature at about 140 ℃, the hot pressing timing stopped punching press after 20 minutes, steam discharge after 35 minutes, pressure drop stage;

Water flowing cooling, pressure, temperature descend naturally, close inlet valve after temperature drops to 90 ℃, are depressurized to the natural decrease temperature and pressure of timing behind the 0.8-1.1mpa, and temperature is the ejecting plate of release afterwards about 70-80 ℃, whole cool time>20 minute.

The product that provides of the present invention has passed through the check of national quality department by national standard method, result such as following table:

As seen, product provided by the invention meets relevant national standard fully, satisfies the requirement that container uses fully.

Describe the present invention in detail below in conjunction with drawings and Examples.

Description of drawings

Fig. 1 is an assembly structure legend 1.

Fig. 2 is an assembly structure legend 2.

Fig. 3 is an assembly structure legend 3.

Fig. 4 is an assembly structure legend 4.

Among the figure: 1. horizontal central layer, 2. vertical central layer

The specific embodiment

The production method of used for bottom plate of container poplar plywood provided by the invention comprises that the poplar log makes qualified central layer through peeling, rotary-cut, drying, shearing, sorting, arrangement, spreading, central layer is through gluing, assembly, pre-molding, secondary assembly<add clone's wooden boards, bamboo mat panel, impregnated paper panel etc. 〉, coldly advance coldly to go out hot pressing, deposit, operations such as sawing, chamfered, check obtain finished product.

Introduce technological process of the present invention below in detail.

One, slave board

1, the log that timber field trickle is preserved moisture blocks according to the boxboard specification, in the reasonably combined blanking of specification ratio, throws in the fermentation vat emerge in worm water 3-4 hour.

2, the log center of getting ready of reserving is contained on the peeler, mixes up and revolve cutter, keep revolving knife edge profit, the limit rotating side plate that is turned.

3, the veneer after the rotary-cut is put on the drying machine dryly, according to the type of the size Selection drying machine of veneer, puts mesh dryer as 8 chi veneers, and 4 chi veneers are put roller drier longitudinal feeding drying.Baking temperature 120-140 ℃, meet the requirements of drying effect by regulating the speed, moisture content is controlled at below 8%.

4, veneer is sheared: shear according to boxboard specification and specification breadth, the veneer classify and pile up after the shearing is repaired and rim charge is combined into plate the veneer in defectiveness cavity.The hole material of repairing is bonding with porose gummed paper.

In order to make high-quality glued board, require veneer thickness even, do not have hard rib and gnaw silk, the plate face does not have burr, and groove mark is no more than 1/3 of thickness of slab, and the tool marks that penetrate mustn't be arranged, and two ends does not have scollop, scallop.That veneer after the arrangement mustn't have is rotten, go mouldy.

Veneer thickness is 1.6-2.0mm, allows the error+0.05mm of local thickness, mustn't minus deviation.Length, width allowable error+10mm, not allowed minus deviation.

Two, oven dry

Baking temperature 120-140 ℃, veneer moisture content 6-8%.

Should stack a period of time after the veneer drying allows its cooling, makes moisture content even.Require material to deposit that the veneer surface temperature must not be higher than 40 ℃ after 12 hours.

Three, veneer gluing;

1, adhesive: use synvaren, add insect-proof agent and flour in the glue, the even existing existing usefulness of transferring of flour addition 5-10% (percentage by weight) modulation modulates glue and must use up in 8 hours.Flour increases adhesiveness as a kind of active filler, can avoid the glue-line be full of cracks, strengthens toughness.

2, glue-spread: 310-340g/m 2

Veneer behind the gluing is assembly as early as possible, requires as far as possible sticking hand during assembly.

Four, assembly

According to assembly structure chart assembly.Referring to Fig. 1-4, composite board for bottom board of container laminate of the present invention is a symmetric arrangement, and laminate is meant facing plate, vertical central layer and horizontal central layer.The facing plate is three layers of vertical central layer 2, is that the horizontal central layer 1 of one deck arranges alternately that with the vertical central layer 2 of one deck total number of plies is the 19-27 layer between the facing plate.Also three layers of vertical central layer can be set in the centre.Laterally central layer 1 and vertical central layer 2 are the poplar plate.Vertically central layer 2 also can be that bamboo wood, hard wood are as cloning wood, Eucalyptus, Larch and birch etc.The facing plate can be poplar plate, painting layer, clone's wood, bamboo mat or tectorial paper.

Veneer thickness is 1.6-2.0mm, allows the error+0.05mm of local thickness, mustn't minus deviation.Length, width allowable error+10mm, not allowed minus deviation.

Five, precompressed

1, the good blanket of group, per 22 stack propelling preformer<according to preformer upper and lower plates spacing 〉:

2, unit pressure is 0.9-1.2mpa, time 30-40 minute.

Pull out stacking, ageing after the precompressed, the digestion time winter-spring season should be less than 24 hours:

Six, hot pressing synthesis technique:

Sheet material after the precompressed adds top surface, carries out hot pressing, adopts the cold cold heat pressing process that goes out that advances:

Finger gauge 28.3mm, unit pressure: 2.6-2.7mpa, temperature 130-140 ℃.

Advance plate below 80 ℃, while increasing temperature and pressure, timing when temperature reaches 130 ℃ fast, 35 minutes heat-insulation pressure keepings are closed admission valve when temperature reaches 140 ℃, maintain the temperature at about 140 ℃, the hot pressing timing stopped punching press after 20 minutes, steam discharge after 35 minutes, pressure drop stage.

Water flowing cooling, pressure, temperature descend naturally, close inlet valve after temperature drops to 80-90 ℃, are depressurized to the natural decrease temperature and pressure of timing behind the 0.8-1.1mpa, and temperature is the ejecting plate of release afterwards about 70-80 ℃, and whole cool time>20 minute prevent bubbling.

Carry out sanding, mitre saw limit, finishing mandrel, chamfered behind the ejecting plate, obtain qualified products.

For preventing the sheet material imbibition, can carry out edge sealing to sheet material, with the polyurethane lacquer edges of boards four bandings are lived.

Embodiment 1:

Assembly structure shown in Figure 1, vertically central layer is the Eucalyptus plate, and laterally central layer and facing plate are the poplar plate, and heat pressing process is as follows:

Pressure 2.6mpa advances plate below 80 ℃, while increasing temperature and pressure, timing when temperature reaches 130 ℃ fast, 35 minutes heat-insulation pressure keepings are closed admission valve when temperature reaches 140 ℃, maintain the temperature at about 140 ℃, the hot pressing timing stopped punching press after 20 minutes, steam discharge after 35 minutes, pressure drop stage;

Water flowing cooling, pressure, temperature descend naturally, close inlet valve after temperature drops to 90 ℃, are depressurized to the natural decrease temperature and pressure of timing behind the 0.8mpa, and temperature is the ejecting plate of release afterwards about 70 ℃, whole cool time>20 minute.

Products obtained therefrom is through being up to the standards.

Embodiment 2:

Assembly structure shown in Figure 4, vertically central layer and horizontal central layer and facing plate are the poplar plate, and heat pressing process is as follows:

Pressure 2.7mpa advances plate below 80 ℃, while increasing temperature and pressure, timing when temperature reaches 130 ℃ fast, 35 minutes heat-insulation pressure keepings are closed admission valve when temperature reaches 140 ℃, maintain the temperature at about 140 ℃, the hot pressing timing stopped punching press after 20 minutes, steam discharge after 35 minutes, pressure drop stage;

Water flowing cooling, pressure, temperature descend naturally, close inlet valve after temperature drops to 90 ℃, are depressurized to the natural decrease temperature and pressure of timing behind the 1.1mpa, and temperature is the ejecting plate of release afterwards about 70 ℃, whole cool time>20 minute.

Products obtained therefrom is through being up to the standards.

Claims (9)

1. composite board for bottom board of container, it is characterized in that: laminate is a symmetric arrangement, the facing plate is three layers of vertical central layer, between the facing plate laterally central layer arrange alternately that with vertical central layer described horizontal central layer is the poplar plate.
2. composite board for bottom board of container as claimed in claim 1 is characterized in that: described vertical central layer is a kind of in poplar plate, clone wood, bamboo wood, Eucalyptus plate, larch plank and the birch plate.
3. as the described composite board for bottom board of container of arbitrary claim among the claim 1-3, it is characterized in that: the centre of described base plate is provided with three layers of vertical central layer.
4. as the described composite board for bottom board of container of claim 1-3, it is characterized in that: the facing plate of described base plate is a kind of in painting layer, clone plank, bamboo mat, the tectorial paper.
5. as any described composite board for bottom board of container of claim 1-3, it is characterized in that: the layout number of plies of described glued board is the 19-27 layer.
6. as any described composite board for bottom board of container of claim 1-3, it is characterized in that: the edges of boards of described glued board are lived with the polyurethane stop-off lacquer.
7. as any described composite board for bottom board of container of claim 1-3, it is characterized in that: veneer thickness is 1.6-2.0mm, allows the error+0.05mm of local thickness.
8. the production method of a composite board for bottom board of container, this method comprises makes central layer, central layer gluing, assembly, pre-molding, secondary assembly, hot pressing, sawing, chamfered step with poplar, it is characterized in that said heat pressing process is:
Pressure 2.6-2.7mpa, temperature 130-140 ℃, advance plate below 80 ℃, while increasing temperature and pressure, timing when temperature reaches 130 ℃ fast, 35 minutes heat-insulation pressure keepings, close admission valve when temperature reaches 140 ℃, maintain the temperature at about 140 ℃, the hot pressing timing stopped punching press after 20 minutes, steam discharge after 35 minutes, pressure drop stage;
Water flowing cooling, pressure, temperature descend naturally, close inlet valve after temperature drops to 90 ℃, are depressurized to the natural decrease temperature and pressure of timing behind the 10mpa, and temperature is the ejecting plate of release afterwards about 75 ℃, whole cool time>20 minute.
9. the production method of composite board for bottom board of container as claimed in claim 8 is characterized in that the central layer gluing uses synvaren, adds flour, flour addition 5-10% in the glue.
CNA2007100870438A 2007-03-15 2007-03-15 Wood veneer for container bottom board and producing method thereof CN101264614A (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
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CN101264614A true CN101264614A (en) 2008-09-17

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101973052A (en) * 2010-09-15 2011-02-16 王炳忠 Production method of parallel laminated plate combining poplar and paulownia
CN102303338A (en) * 2011-09-05 2012-01-04 宿迁市曙光木业有限公司 Process for manufacturing aspen container floor
CN102424741A (en) * 2011-09-15 2012-04-25 范会芳 Compound glue film for full-bamboo container floor gluing and full-bamboo container floor
CN102490233A (en) * 2011-12-02 2012-06-13 朱江福 Manufacture method for bamboo wood composite boards
CN102642220A (en) * 2012-04-26 2012-08-22 武汉双龙木业发展有限责任公司 Paint-free ecological core-board of poplar substrate and production process thereof
CN102642222A (en) * 2012-05-03 2012-08-22 北京林业大学 Method for preparing aldehyde-free veneer boards by biological oil starch adhesives
CN102717415A (en) * 2012-07-12 2012-10-10 福建篁城科技竹业有限公司 Sectional type bamboo plate hot pressing technology
CN102744760A (en) * 2012-07-12 2012-10-24 福建篁城科技竹业有限公司 Bamboo plate manufacturing process
CN102745356A (en) * 2012-07-12 2012-10-24 福建篁城科技竹业有限公司 Bamboo container bottom board and hot-pressing technology thereof
CN102837339A (en) * 2012-09-28 2012-12-26 康欣新材料科技股份有限公司 Plywood for base plate of full-poplar container
CN104385386A (en) * 2014-09-19 2015-03-04 广西天利恒木业有限公司 Full fast-growing tree timber composite plywood for container soleplate
CN106335110A (en) * 2016-10-27 2017-01-18 福建隆达竹业有限公司 Preparation method for bamboo plywood
CN108081405A (en) * 2017-11-24 2018-05-29 南宁科天水性科技有限责任公司 A kind of hot pressing humidity discharging method of glued board and core-board
CN110576481A (en) * 2019-10-09 2019-12-17 南平市华泰木竹有限公司 Novel bamboo-wood restructuring structure processing technology

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101973052A (en) * 2010-09-15 2011-02-16 王炳忠 Production method of parallel laminated plate combining poplar and paulownia
CN102303338A (en) * 2011-09-05 2012-01-04 宿迁市曙光木业有限公司 Process for manufacturing aspen container floor
CN102424741B (en) * 2011-09-15 2013-08-14 范会芳 Compound glue film for full-bamboo container floor gluing and full-bamboo container floor
CN102424741A (en) * 2011-09-15 2012-04-25 范会芳 Compound glue film for full-bamboo container floor gluing and full-bamboo container floor
CN102490233A (en) * 2011-12-02 2012-06-13 朱江福 Manufacture method for bamboo wood composite boards
CN102642220A (en) * 2012-04-26 2012-08-22 武汉双龙木业发展有限责任公司 Paint-free ecological core-board of poplar substrate and production process thereof
CN102642222A (en) * 2012-05-03 2012-08-22 北京林业大学 Method for preparing aldehyde-free veneer boards by biological oil starch adhesives
CN102642222B (en) * 2012-05-03 2015-06-17 北京林业大学 Method for preparing aldehyde-free veneer boards by biological oil starch adhesives
CN102745356B (en) * 2012-07-12 2015-05-20 洪敏雄 Bamboo container bottom board and hot-pressing technology thereof
CN102717415A (en) * 2012-07-12 2012-10-10 福建篁城科技竹业有限公司 Sectional type bamboo plate hot pressing technology
CN102744760A (en) * 2012-07-12 2012-10-24 福建篁城科技竹业有限公司 Bamboo plate manufacturing process
CN102745356A (en) * 2012-07-12 2012-10-24 福建篁城科技竹业有限公司 Bamboo container bottom board and hot-pressing technology thereof
CN102837339A (en) * 2012-09-28 2012-12-26 康欣新材料科技股份有限公司 Plywood for base plate of full-poplar container
CN104385386A (en) * 2014-09-19 2015-03-04 广西天利恒木业有限公司 Full fast-growing tree timber composite plywood for container soleplate
CN106335110A (en) * 2016-10-27 2017-01-18 福建隆达竹业有限公司 Preparation method for bamboo plywood
CN108081405A (en) * 2017-11-24 2018-05-29 南宁科天水性科技有限责任公司 A kind of hot pressing humidity discharging method of glued board and core-board
CN110576481A (en) * 2019-10-09 2019-12-17 南平市华泰木竹有限公司 Novel bamboo-wood restructuring structure processing technology

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