CN103009443A - Preparation method of light-weight plywood - Google Patents
Preparation method of light-weight plywood Download PDFInfo
- Publication number
- CN103009443A CN103009443A CN 201210556807 CN201210556807A CN103009443A CN 103009443 A CN103009443 A CN 103009443A CN 201210556807 CN201210556807 CN 201210556807 CN 201210556807 A CN201210556807 A CN 201210556807A CN 103009443 A CN103009443 A CN 103009443A
- Authority
- CN
- China
- Prior art keywords
- preparation
- light
- processing
- husky
- described step
- 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.)
- Pending
Links
Landscapes
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention discloses a preparation method of a light-weight plywood. A manufacturing process comprises selecting materials, pre-treating, maintaining, molding, sizing, spreading glue, blank assembling, prepressing, hot pressing, maintaining, polishing and subsequent treatment. Through the technical scheme, the characteristic of light weight of light wood is utilized, so that the light-weight plywood can be prepared; meanwhile, the difference between the mechanical properties in the rift grain direction and cross grain direction of a plate is utilized, so that the problem of low strength caused by low density of the plate is solved; and a gradient cooling and pressure lowering method is adopted, so that the intensity of the light-weight plywood can be enhanced.
Description
Technical field
The invention discloses a kind of manufacture craft of glued board, specific design be a kind of preparation method of lightweight plywood.
Background technology
In the industrial trees of China, because the climatic characteristic of China, great majority are present in the northern territory of China in the industrial trees of China.The Main physical character of timber has: density: the weight that refers to unit volume timber.The weight and volume of timber is affected by moisture content all.Volume when the oven-dry weight of wood sample and its saturation moisture, the ratio of the volume the when volume after the oven dry and stove are done is called basic density. Absolute Dry Density and stove dry density.The ratio of the volume after the weight of timber after gas is done is done with gas is called the air-dry density of timber.Density of wood is different with seeds.The air-dry density of most of timber is about 0.3～0.9 gram per centimeter.The timber that density is large, its mechanical strength is generally higher.Moisture content: refer to that water heavily accounts for the heavy percentage of kiln dried wood in the timber.Moisture in the timber can divide two parts, and a part is present in the wood cell cell wall, is called adsorbed water; Another part is present between lumen and the space between cells, is called Free water (free water).When adsorbed water reaches capacity and there is no Free water, be called fibre saturated point.The fibre saturated point of timber is variant because of seeds, between 23～33%.When moisture content during greater than fibre saturated point, moisture is very little on the impact of wood property.When moisture content when fibre saturated point reduces, physics and the mechanical property of timber change thereupon.Timber can absorb or transpiring moisture in atmosphere, adapts with the relative humidity of surrounding air and temperature and reaches constant moisture content, is called equilibrium moisture content.Wood equilibrium moisture content changes with factors such as area, season and weathers, between 10～18%.Swell-shrink characteristic: volumetric expansion behind the timber absorption moisture, forfeiture moisture then shrinks.The contract with dry rate that timber is done to stove from fibre saturated point, the rift grain direction is about 0.1%, radially is about 3～6%, tangentially is about 6～12%.Radially with tangential contract with dry rate be not both the main cause that timber produces crack and warpage.The mechanical property of timber: timber has good mechanical property, but timber is organic anisotropic material, and the mechanical property of rift grain direction and band direction has very big difference.Rift grain tension and the compression strength of timber are all higher, but band tension and compression strength are lower.Strength of wood is also different because of seeds, and is subjected to the impact of the factors such as defects in timber, load action time, moisture content and temperature, wherein with both have the greatest impact of defects in timber and load action time.Because of different with the position, the stressed character of knaur size (draw or press) difference, there is the strength ratio of joint timber can reduce by 30～60% without joint timber.The long-term strength of timber almost only has half of instantaneous strength under the load long term.For in low-density seeds exist intensity low, the characteristics that material is soft, the timber that density is little, its mechanical strength is generally lower.The invention disclosed number of patent application is 201010017212.2 on the State Intellectual Property Office website, denomination of invention is the manufacture method of light high-intensity wood composite plywood plate and the patent of invention of structure, its technical scheme is by with glass fibre and the compound restructuring of veneer, change the combination of carrying out as central layer and panel with veneer of original dullness of the prior art, the main feature of this technique is the bulk strength that increases the intensity of glass fibre and then strengthen glued board, although this method can play the bulk strength that strengthens glued board, but the mechanical property of not utilizing sheet material rift grain direction and band direction fully has very these characteristics of big difference, and self intensity with sheet material does not use.
Summary of the invention
The present invention is according to above-mentioned deficiency, discloses the preparation method that a kind of characteristic of utilizing sheet material self strengthens the lightweight plywood of intensity.
For achieving the above object, technical scheme of the present invention is a kind of preparation method's of lightweight plywood preparation method, and its manufacturing process is:
1) selection: choose thickness and be the plank of 2.7-2.8mm light weight as central layer; Thickness is that the 0.3-0.4mm plank is as facial tissue;
2) preliminary treatment: the central layer in the step 1 and panel are carried out drying and processing;
3) health, moulding and typing: with being placed on behind the drying and processing in the step 2 under the dry indoor environment, left standstill 2～3 days; Blank moulding: use the automatic plate-splicing machine splicing, make three plates form the integral body without connecting sewing; Typing: with stone compacting 10～12 hours, make its typing;
4) gluing: carry out gluing by automatic glue spreaders;
5) assembly: after carry out step 4, carry out assembly according to the order of the both sides that are arranged in central layer corresponding to panel;
6) precompressed: by preformer, precompressed makes its moulding;
7) hot pressing: carry out hot pressing by hot press;
8) health: be placed under the dry indoor environment, left standstill 1～2 day;
9) husky light: selecting sandbag order number is that 40 purpose sandbags carry out husky light;
10) subsequent treatment: treatment step comprises smears masking agent, and melamine glue is smeared in preliminary health, clad can paper, and pre-health, precompressed is processed, cutting edge, hot pressing, facial tissue is repaired, and repairs the limit mouth, degree of depth health and Sha Guang.
Central layer in the described step 1 can be selected paulownia wood or poplar.
The bake out temperature of the drying and processing in the described step 2 is 90-110 ℃, and the time is 8-15 minute.
Central layer moisture behind the drying and processing in the described step 2 is 10-12%.
Gluing in the described step 4 the glue kind be E2 or WBP glue.
Glue-spread in the described step 4 is whole 70-75 gram of single face.
Squeeze time in the described step 6 is 45 minutes-1 hour, and pressure is 1.4-1.6MPa.
In the hot pressing in the described step 7, pressure is 1.2-1.4MPa, and temperature is 130-140 ℃, and the time is 35-45 minute; Hot-pressing processing adopts gradient increased temperature, gradient boost, gradient cooling then, the processing method of gradient step-down; After the hot-pressing processing, make its moisture≤12%; Husky optical thickness is 17mm ± 0.02.
Smearing in the masking agent process in the described step 10, applying amount are whole 0.15kg of single face; Preliminary conditioned time is 12-13 hour, makes its moisture≤12%; Smear in the process of melamine glue, applying amount is 0.75kg; Facial tissue can be selected birch; The pre-health time is 30-35 minute; Pressure is 1.4-1.6MPa in the precompressed processing procedure, and squeeze time is 30-35 minute; Temperature is 95-110 ℃ in the hot pressing, and the time is 240-360 second, and pressure is 0.8-1.0MPa; In the husky photoreduction process, selecting sandbag order number is 240 orders and 360 orders.
Then the husky photoreduction process of described sandbag repeats husky light with 360 purpose sandbags at first carrying out husky light with 240 purpose sandbags.
Beneficial effect by above-mentioned technique is, utilized the light characteristics of light wood material, can prepare lightweight plywood; Distinctiveness with the mechanical property of sheet material rift grain direction and band direction uses simultaneously, has solved because the low low characteristics of intensity of bringing of the density of sheet material.Adopt the method for gradient cooling and step-down, can strengthen the intensity of lightweight plywood.
The specific embodiment
The present invention is further illustrated below in conjunction with the specific embodiment.
Embodiment one:
A kind of preparation method's of lightweight plywood preparation method, its manufacturing process is:
1) selection: choosing poplar or the paulownia carpentery workshop that thickness is the 2.7mm light weight is central layer; Thickness is that the 0.3mm birch is as facial tissue;
2) preliminary treatment: the central layer in the step 1 and panel are carried out drying and processing; Bake out temperature is 90 ℃, and the time is 8 minutes;
3) health, moulding and typing: with being placed on behind the drying and processing in the step 2 under the dry indoor environment, left standstill 2 days; Blank moulding: use the automatic plate-splicing machine splicing, make three plates form the integral body without connecting sewing; The typing: with stone be compressed on forming without connecting sewing on the whole, below the stone pad on interlayer, suppressed 10 hours, make its typing; Central layer moisture behind the drying and processing is 10%;
4) gluing: smear WBP glue by automatic glue spreaders; Glue-spread is whole 70 gram of single face;
5) assembly: after carry out step 4, stereotype plate behind the gluing in the step 4 is transversely arranged, qualitative plate behind the monolithic gluing is all placed up and down vertically plate of paulownia wood, that poplar is horizontal, paulownia is wooden vertically, poplar is horizontal, paulownia is wooden vertically, poplar is horizontal, paulownia is wooden vertically, poplar is horizontal successively, then coat E2 glue at upper surface and the horizontal lower surface of undermost poplar of the superiors' poplar transverse plate, on the top and bottom of the above-mentioned panel that sets, all stick the birch plate as facial tissue at last;
6) precompressed: must be by preformer within 6 hours after step 5, precompressed makes its moulding; Squeeze time is 45 minutes, and pressure is 1.4MPa;
7) hot pressing: carry out hot pressing by hot press; In the hot pressing, pressure is 1.2MPa, and temperature is 130 ℃, and the time is 35 minutes; Hot-pressing processing adopts gradient increased temperature, gradient boost, gradient cooling then, the processing method of gradient step-down; After the hot-pressing processing, make its moisture 12%; Husky optical thickness is 17mm ± 0.02; Before hot pressing, furnace temperature is raise rapidly, and then shove charge, in the process of shove charge, progressively supercharging, be controlled in this process within 50 minutes, the best time is about 25 minutes, then valve-off, lower the temperature, can adopt nature cooling or Physical temperature-lowering, preferably adopt Physical temperature-lowering, temperature fall time was controlled at about 38 minutes, when temperature drops to 60 ℃, measure by thermometer, collect steam and carry out quantitative analysis, when water from steam divides content to be 12%, employing is lowered the temperature naturally, in the process of naturally cooling, with the direct zero clearing of pressure, this time was controlled within 30 minutes, if in the natural temperature-fall period, ambient temperature is higher, adopts Physical temperature-lowering, and the time was controlled within 30 minutes;
8) health: be placed under the dry indoor environment, left standstill 1 day;
9) husky light: selecting sandbag order number is that 40 purpose sandbags carry out husky light;
10) subsequent treatment: treatment step comprises smears masking agent, and melamine glue is smeared in preliminary health, clad can paper, and pre-health, precompressed is processed, cutting edge, hot pressing, facial tissue is repaired, and repairs the limit mouth, degree of depth health and Sha Guang; Smear in the masking agent process, applying amount is whole 0.15kg of single face; Preliminary conditioned time is 12 hours, makes its moisture≤12%; Smear in the process of melamine glue, applying amount is 0.75kg; Facial tissue can be selected birch; The pre-health time is 30 minutes; Pressure is 1.4MPa in the precompressed processing procedure, and squeeze time is 30 minutes; Carry out cutting edge, carry out cutting edge according to client's requirement; Temperature is 95 ℃ in the hot pressing, and the time is 240 seconds, and pressure is 0.8MPa; Facial tissue is repaired, and removes dying for the sake of honour on the facial tissue, facial tissue is repaired complete by spreading putty; Repair the limit mouth: will be from core, repairing of few layer carried out washboard with sand paper, makes Qi Biankou smooth; In the husky photoreduction process, selecting sandbag order number is 240 orders and 360 orders.Then the husky photoreduction process of sandbag repeats husky light with 360 purpose sandbags at first carrying out husky light with 240 purpose sandbags, can make the plate face smooth, without revealing the exact details, gnaws head, leaks sand, partially husky phenomenon.
Embodiment two:
In the assembly process, the stereotype plate behind the gluing is transversely arranged, then central layer is carried out sorting, choose loose side and tight face, with the location loose side of coarse texture, opposite be decided to be tight face; Qualitative plate behind the monolithic gluing is all placed up and down vertically plate of paulownia wood, the laterally tight face of poplar, the wooden vertically loose side of paulownia, the laterally tight face of poplar, the vertical loose side of paulownia wood, the laterally tight face of poplar, paulownia wood vertically loose side, the horizontal tight face of poplar successively, then coat E2 glue at upper surface and the horizontal lower surface of undermost poplar of the superiors' poplar transverse plate, on the top and bottom of the above-mentioned panel that sets, all stick the birch plate as facial tissue at last; Carry out hot pressing by hot press in the hot pressing; In the hot pressing, pressure is 1.3MPa, and temperature is 135 ℃, and the time is 38 minutes; Hot-pressing processing adopts gradient increased temperature, gradient boost, gradient cooling then, the processing method of gradient step-down; After the hot-pressing processing, make its moisture 10%; Husky optical thickness is 17mm ± 0.02; Before hot pressing, furnace temperature is raise rapidly, and then shove charge, in the process of shove charge, progressively supercharging, be controlled in this process within 50 minutes, the best time is about 25 minutes, then valve-off, lower the temperature, can adopt nature cooling or Physical temperature-lowering, preferably adopt Physical temperature-lowering, temperature fall time was controlled at about 38 minutes, when temperature drops to 50 ℃, measure by thermometer, collect steam and carry out quantitative analysis, when water from steam divides content to be 10%, employing is lowered the temperature naturally, in the process of naturally cooling, with the direct zero clearing of pressure, this time was controlled within 30 minutes, if in the natural temperature-fall period, ambient temperature is higher, adopts Physical temperature-lowering, and the time was controlled within 30 minutes.
Certainly, the technical matters in other steps belongs to prior art, is not again giving unnecessary details.
Claims (10)
1. the preparation method of a lightweight plywood is characterized in that its manufacturing process is:
1) selection: choose thickness and be the plank of 2.7-2.8mm light weight as central layer; Thickness is that the 0.3-0.4mm plank is as facial tissue;
2) preliminary treatment: the central layer in the step 1 and panel are carried out drying and processing;
3) health, moulding and typing: with being placed on behind the drying and processing in the step 2 under the dry indoor environment, left standstill 2～3 days; Blank moulding: use the automatic plate-splicing machine splicing, make three plates form the integral body without connecting sewing; Typing: with stone compacting 10～12 hours, make its typing;
4) gluing: carry out gluing by automatic glue spreaders;
5) assembly: after carry out step 4, carry out assembly according to the order of the both sides that are arranged in central layer corresponding to panel;
6) precompressed: by preformer, precompressed makes its moulding;
7) hot pressing: carry out hot pressing by hot press;
8) health: be placed under the dry indoor environment, left standstill 1～2 day;
9) husky light: selecting sandbag order number is that 40 purpose sandbags carry out husky light;
10) subsequent treatment: treatment step comprises smears masking agent, and melamine glue is smeared in preliminary health, clad can paper, and pre-health, precompressed is processed, cutting edge, hot pressing, facial tissue is repaired, and repairs the limit mouth, degree of depth health and Sha Guang.
2. the preparation method of lightweight plywood according to claim 1, it is characterized in that: the central layer in the described step 1 can be selected paulownia wood or poplar.
3. the preparation method of lightweight plywood according to claim 1, it is characterized in that: the bake out temperature of the drying and processing in the described step 2 is 90-110 ℃, the time is 8-15 minute.
4. the preparation method of lightweight plywood according to claim 1, it is characterized in that: the central layer moisture behind the drying and processing in the described step 2 is 10-12%.
5. the preparation method of lightweight plywood according to claim 1 is characterized in that: the gluing in the described step 4 the glue kind be E2 or WBP glue.
6. the preparation method of lightweight plywood according to claim 1 is characterized in that: the glue-spread in the described step 4 is whole 70-75 gram of single face.
7. the preparation method of lightweight plywood according to claim 1, it is characterized in that: the squeeze time in the described step 6 is 45 minutes-1 hour, and pressure is 1.4-1.6MPa.
8. the preparation method of lightweight plywood according to claim 1, it is characterized in that: in the hot pressing in the described step 7, pressure is 1.2-1.4MPa, and temperature is 130-140 ℃, and the time is 35-45 minute; Hot-pressing processing adopts gradient increased temperature, gradient boost, gradient cooling then, the processing method of gradient step-down; After the hot-pressing processing, make its moisture≤12%; Husky optical thickness is 17mm ± 0.02.
9. the preparation method of lightweight plywood according to claim 1, it is characterized in that: smearing in the masking agent process in the described step 10, applying amount are whole 0.15kg of single face; Preliminary conditioned time is 12-13 hour, makes its moisture≤12%; Smear in the process of melamine glue, applying amount is 0.75kg; Facial tissue can select birch originally; The pre-health time is 30-35 minute; Pressure is 1.4-1.6MPa in the precompressed processing procedure, and squeeze time is 30-35 minute; Temperature is 95-110 ℃ in the hot pressing, and the time is 240-360 second, and pressure is 0.8-1.0MPa; In the husky photoreduction process, selecting sandbag order number is 240 orders and 360 orders.
10. the preparation method of lightweight plywood according to claim 1, it is characterized in that: then the husky photoreduction process of described sandbag repeats husky light with 360 purpose sandbags at first carrying out husky light with 240 purpose sandbags.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210556807 CN103009443A (en) | 2012-12-07 | 2012-12-07 | Preparation method of light-weight plywood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210556807 CN103009443A (en) | 2012-12-07 | 2012-12-07 | Preparation method of light-weight plywood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103009443A true CN103009443A (en) | 2013-04-03 |
Family
ID=47958822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210556807 Pending CN103009443A (en) | 2012-12-07 | 2012-12-07 | Preparation method of light-weight plywood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103009443A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104942912A (en) * | 2015-06-12 | 2015-09-30 | 柳州市骏马木业有限公司 | Method for processing high-performance environment-friendly eucalyptus plywood |
| CN106217507A (en) * | 2016-08-08 | 2016-12-14 | 李军 | The sheet material of a kind of aviation clamp and manufacture method thereof |
| CN107020669A (en) * | 2017-05-05 | 2017-08-08 | 贵港市鑫宏木业有限公司 | A kind of technique for producing core-board |
| CN108075158A (en) * | 2016-11-18 | 2018-05-25 | 中国科学院大连化学物理研究所 | A kind of preparation method of fuel cell CCM membrane electrodes |
| CN115674371A (en) * | 2022-09-20 | 2023-02-03 | 贺州市恒轩木业有限公司 | Preparation method of low-formaldehyde environment-friendly plywood and low-formaldehyde environment-friendly plywood |
-
2012
- 2012-12-07 CN CN 201210556807 patent/CN103009443A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104942912A (en) * | 2015-06-12 | 2015-09-30 | 柳州市骏马木业有限公司 | Method for processing high-performance environment-friendly eucalyptus plywood |
| CN106217507A (en) * | 2016-08-08 | 2016-12-14 | 李军 | The sheet material of a kind of aviation clamp and manufacture method thereof |
| CN108075158A (en) * | 2016-11-18 | 2018-05-25 | 中国科学院大连化学物理研究所 | A kind of preparation method of fuel cell CCM membrane electrodes |
| CN108075158B (en) * | 2016-11-18 | 2020-10-02 | 中国科学院大连化学物理研究所 | Method for preparing CCM membrane electrode of fuel cell |
| CN107020669A (en) * | 2017-05-05 | 2017-08-08 | 贵港市鑫宏木业有限公司 | A kind of technique for producing core-board |
| CN115674371A (en) * | 2022-09-20 | 2023-02-03 | 贺州市恒轩木业有限公司 | Preparation method of low-formaldehyde environment-friendly plywood and low-formaldehyde environment-friendly plywood |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101456195B (en) | Structure plywood plate for timber-construction and production method thereof | |
| CN102554980B (en) | Manufacturing method of laminated veneer lumber | |
| CN102107447B (en) | Wood sectional material and manufacturing method thereof | |
| CN103009443A (en) | Preparation method of light-weight plywood | |
| CN101863058B (en) | Novel laminated wood and manufacturing method thereof | |
| Zhang et al. | Novel engineered scrimber with outstanding dimensional stability from finely fluffed poplar veneers | |
| CN108214729B (en) | Surface layer enhanced plywood and preparation method thereof | |
| CN104191471A (en) | High-strength poplar laminated veneer lumber and manufacturing method thereof | |
| CN201677368U (en) | Bamboo composite plywood used for container floor | |
| CN102107452A (en) | Cork solid wood flooring and manufacturing method thereof | |
| US8221894B2 (en) | Surface reinforced solid wood profiles, flooring and manufacturing method | |
| CN103481348A (en) | Integral reinforced solid wood section bar and manufacturing method thereof | |
| CN1004126B (en) | method for manufacturing bamboo plywood | |
| CN104608211A (en) | Plywood with super-thick core layer and preparation process thereof | |
| Choowang et al. | PROPERTIES OF THERMALLY-COMPRESSED OIL PALM TRUNKS"(ELAEIS GUINEENSIS)" | |
| CN102407548B (en) | Method for manufacturing solid wood floorings by utilizing densified fast growing woods | |
| CN103600379A (en) | OSB4 (oriented strand board 4) bamboo-wood composite film-faced plywood for container bottom board and fabricating method thereof | |
| CN111113586A (en) | Preparation method of oriented strand board | |
| CN108501478A (en) | A kind of compound laminated veneer lumber of high intensity eucalyptus poplar and its manufacturing method | |
| CN106891588A (en) | A kind of wood skin veneer laminate wood floors and preparation method thereof | |
| CN103433982A (en) | Processing method of crosswise laminated plate | |
| CN201581603U (en) | Broad block wood floor | |
| CN109808011A (en) | A kind of impregnating by pressure fire retardant formula cemented bamboo component and preparation method thereof | |
| CN103978537A (en) | One-time formed methanal-free compound panel and processing technique | |
| CN103465318B (en) | A kind of bamboo wood composite container baseboard and manufacture method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130403 |