CN103737699A - Specially shaped wood fiber molded product enclosed forming method - Google Patents
Specially shaped wood fiber molded product enclosed forming method Download PDFInfo
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- CN103737699A CN103737699A CN201410011559.4A CN201410011559A CN103737699A CN 103737699 A CN103737699 A CN 103737699A CN 201410011559 A CN201410011559 A CN 201410011559A CN 103737699 A CN103737699 A CN 103737699A
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Abstract
The invention discloses a specially shaped wood fiber molded product enclosed forming method. The method sequentially includes processes of drying, blending, mat formation, pre-pressing and hot press molding. By means of the method, the moisture content of wood fibers is kept in 8% to 18%, during hot press molding, the temperature is controlled between 95 DEG C to 130 DEG C, the hot-press pressure is controlled between 30kg/cm2 to 110kg/cm2, and the hot-pressing time is controlled between 2.5 minutes to 28 minutes. According to the method, the moisture content in the wood fibers is increased so as to increase heat transfer rate in products, the time consumed by a heated object core layer which reaches curing temperature in a glue process is shortened, the producing efficiency is increased, moreover, the heating temperature is properly lowered so as to eliminate phenomena of product layering and surface bulging in the compression molding process, and qualities of wood fiber molded products are improved.
Description
Technical field
The invention belongs to wood furniture manufacturing technology field, relate in particular to the manufacture method of special-shaped wood-fibred mold pressing furniture parts.
Background technology
At present, make furniture form parts mainly by the method for machinery and hand engraving, obtain the special-shaped decorative cover with complicated exquisite decorative pattern or pattern.This furniture parts of producing by machinery and hand engraving mainly be take solid wood as raw material, approximately has 75% timber not to be utilized effectively in engraving process, causes the direct cost of producing furniture significantly to increase; Meanwhile, machinery and hand engraving need to spend a large amount of processing equipments and man hour of labour, and production efficiency is low, cost of labor is high.And China is the relatively poor countries of the forest reserves, the annual breach of timber more than 600 sides, the timber utilization rate of antique traditional furniture manufacturing process only 50%-70%.Therefore with one or more in wood powder, wood shavings and fiber, be mixed into raw material, the wood furniture parts that environmental protection is manufactured in disposable compression molding will effectively improve timber utilization rate, save man hour of labour in a large number, improve furniture class, and Furniture manufacture is had to great economic benefit and social benefit.
The applicant has applied for a kind of shaped wooden mould pressing furniture part and manufacture method thereof on November 15th, 2010,---impregnation---applying glue---dress mould---precompressed---heating and mould pressing---pressurize---postprocessing working procedures that this manufacture method comprises the pretreatment of raw material successively, the moisture control of wood materials is 6～14%, hot pressing temperature 175-190 ℃, by hot-forming in mould again after microwave preheating, the method is being mainly used in making wood-fibred solid parts, clamp time is long, production efficiency is low, material consumption is high, and product easily produces layering, the phenomenons such as bulge, therefore be necessary above-mentioned defect to improve.
Summary of the invention
For the deficiencies in the prior art, the invention provides the method for the closed moulding of a kind of special-shaped wood-fibred pressing.
The present invention is achieved through the following technical solutions: 1) drying process: the wood fiber raw material that defibrator process is gone out enters and launch as surprise attack formula heated-air drying pipeline through feeding screw, through 115 ℃～180 ℃ heated air dryings, processes, and controls its moisture content 8%～18%; 2) modulation process: drying reaches the wood fiber raw material of technological requirement moisture content, adhesive and the appropriate amount of addition agent of adding 12%-30%, by wood-fibred sizing applicator mixing and stirring, enter and measure the station of mating formation; 3) metering paving process: according to small product size and target density, take the wood fiber raw material after appropriate modulation, evenly mat formation reinforced; 4) pre-pressing process: the wood fiber raw material through mating formation, carries out raw material precommpression by preformer, preload pressure 5～10 kg/cm
2, after precompressed, obtain pre-molding idiosome; 5) hot press forming technology: pre-molding base substrate is sent into corresponding special-shaped wood-fibred mold pressing assembling die, through temperature, pressure-acting, compression molding, 100 ℃～130 ℃ of hot pressing temperatures, hot pressing pressure 30kg/cm
2～110kg/cm
2, hot pressing time 2.5 min～28min.
In technique scheme, described wood materials is one or more the mixture in wood powder, wood shavings, fiber.
In technique scheme, described adhesive is one or more in modified urea-formaldehyde resin, phenolic resins, melmac.
In technique scheme, described auxiliary agent is ammonium chloride, ammonium sulfate, one or more in paraffin wax emulsions.
The present invention has following beneficial effect: in the heating object of mould inside, by wood-fibred, water, glue, air, formed heat transfer system.With respect to other three-phases, water is the fastest phase of heat conduction in this system, and mold heat is passed through to water, moisture vapor transfer to sandwich layer glue.
First, the present invention improves the heat transfer rate of interiors of products by the water content in increase wood-fibred, make heating object sandwich layer reach the time shorten of glue technique solidification temperature, enhances productivity; Secondly, suitably reduce the phenomenon that heating-up temperature is eliminated product layering, surperficial bulge in compression molding process, improve the quality of wood-fibred molded product; Finally, by adopting wood-fibred shaped die to press the structural design of thin-wall case, in the situation that not affecting furniture parts intensity, significantly reduce the raw material consumption of unidimensional product, shortened the heat transfer thickness of product, reduced cost.
The specific embodiment
Below the present invention is described in further detail, the method of the closed moulding of a kind of special-shaped wood-fibred pressing, the method comprises the steps: 1) drying process: the wood fiber raw material that defibrator process is gone out enters and launch as surprise attack formula heated-air drying pipeline through feeding screw, through 115 ℃～180 ℃ heated air dryings, process, control its moisture content 8%～18%, the too low heating effect that easily causes of water content is not obvious, water content is too high easily causes the unnecessary water yield in heating process, to be difficult to derive from mould with the form of steam, cause product surface layering, bulge; 2) modulation process: drying reaches the wood fiber raw material of technological requirement moisture content, adhesive and the appropriate amount of addition agent of adding 12%-30%, by wood-fibred sizing applicator mixing and stirring, enter and measure the station of mating formation; 3) metering paving process: according to small product size and target density, take the wood fiber raw material after appropriate modulation, evenly mat formation reinforced; 4) pre-pressing process: the wood fiber raw material through mating formation, carries out raw material precommpression by preformer, preload pressure 5～10 kg/cm
2, after precompressed, obtain pre-molding idiosome; 5) hot press forming technology: pre-molding base substrate is sent into corresponding special-shaped wood-fibred mold pressing assembling die, through temperature, pressure-acting, compression molding, 95 ℃～130 ℃ of hot pressing temperatures, hot pressing pressure 30kg/cm
2～110kg/cm
2, hot pressing time 2.5 min～28min.After the demoulding, obtain special-shaped wood-fibred pressing, hot pressing temperature can regulate according to the height of wood-fibred moisture content, and moisture content is lower in theory, and it is higher that hot pressing temperature need to regulate, and now hot pressing time reduces relatively; Moisture content is higher, and it is lower that hot pressing temperature can regulate, but hot pressing time increases relatively.
Described wood materials is one or more the mixture in wood powder, wood shavings, fiber.
In the heating object of mould inside of the present invention, by wood-fibred, water, glue, air, formed heat transfer system.With respect to other three-phases, water is the fastest phase of heat conduction in this system, and mold heat is passed through to water, moisture vapor transfer to sandwich layer glue.
First, the present invention improves the heat transfer rate of interiors of products by the water content in increase wood-fibred, make heating object sandwich layer reach the time shorten of glue technique solidification temperature, enhances productivity; Secondly, suitably reduce the phenomenon that heating-up temperature is eliminated product layering, surperficial bulge in compression molding process, improve the quality of wood-fibred molded product; Finally, by adopting wood-fibred shaped die to press the structural design of thin-wall case, in the situation that not affecting furniture parts intensity, significantly reduce the raw material consumption of unidimensional product, shortened the heat transfer thickness of product, reduced cost.
Claims (4)
1. the method for the closed moulding of a special-shaped wood-fibred pressing, it is characterized in that: the method comprises the steps: 1) drying process: the wood fiber raw material that defibrator process is gone out enters and launch as surprise attack formula heated-air drying pipeline through feeding screw, through 115 ℃～180 ℃ heated air dryings, process, control its moisture content 8%～18%; 2) modulation process: drying reaches the wood fiber raw material of technological requirement moisture content, adhesive and the appropriate amount of addition agent of adding 12%-30%, by wood-fibred sizing applicator mixing and stirring, enter and measure the station of mating formation; 3) metering paving process: according to small product size and target density, take the wood fiber raw material after appropriate modulation, evenly mat formation reinforced; 4) pre-pressing process: the wood fiber raw material through mating formation, carries out raw material precommpression by preformer, preload pressure 5～10 kg/cm
2, after precompressed, obtain pre-molding idiosome; 5) hot press forming technology: pre-molding base substrate is sent into corresponding special-shaped wood-fibred mold pressing assembling die, through temperature, pressure-acting, compression molding, 95 ℃～130 ℃ of hot pressing temperatures, hot pressing pressure 30kg/cm
2～110kg/cm
2, hot pressing time 2.5 min～28min.
2. the method for the closed moulding of a kind of special-shaped wood-fibred pressing as claimed in claim 1, is characterized in that: described wood materials is one or more in wood powder, wood shavings, fiber.
3. the method for the closed moulding of a kind of special-shaped wood-fibred pressing as claimed in claim 1, is characterized in that: described adhesive is one or more in modified urea-formaldehyde resin, phenolic resins, melmac.
4. the method for the closed moulding of a kind of special-shaped wood-fibred pressing as claimed in claim 1, is characterized in that: described auxiliary agent is one or more in ammonium chloride, ammonium sulfate and paraffin wax emulsions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410011559.4A CN103737699A (en) | 2014-01-10 | 2014-01-10 | Specially shaped wood fiber molded product enclosed forming method |
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|---|---|---|---|
| CN201410011559.4A CN103737699A (en) | 2014-01-10 | 2014-01-10 | Specially shaped wood fiber molded product enclosed forming method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104526827A (en) * | 2014-12-25 | 2015-04-22 | 浙江新木材料科技有限公司 | Wood fiber special shaped workpiece laminated thermal fixation method |
| CN104552548A (en) * | 2014-12-25 | 2015-04-29 | 浙江新木材料科技有限公司 | Equal-pressure forming method of wood fiber molded special-shaped parts |
| CN104552547A (en) * | 2014-12-25 | 2015-04-29 | 浙江新木材料科技有限公司 | Equal-density paving and cold pressing method for wood fiber molded special-shaped parts |
| CN104552528A (en) * | 2014-12-22 | 2015-04-29 | 浙江新木材料科技有限公司 | Cold pressing shock excitation forming and thermosetting method for wood fiber special-shaped workpiece |
| CN106042414A (en) * | 2016-05-29 | 2016-10-26 | 王正 | Automobile inner decoration mold-pressed profile preparation technique through wood fiber double mold pressing method |
| CN106079022A (en) * | 2016-06-15 | 2016-11-09 | 中南林业科技大学 | A kind of ultra-low formaldehyde release household material preparation method based on fast-growing grass |
| CN106079021A (en) * | 2016-06-15 | 2016-11-09 | 中南林业科技大学 | Prosthetic Form aldehyde release biology plate preparation method based on fast-growing grass |
| CN106079018A (en) * | 2016-06-15 | 2016-11-09 | 中南林业科技大学 | A kind of preparation method of prosthetic Form aldehyde release household material based on fast-growing grass |
| CN107586462A (en) * | 2017-09-14 | 2018-01-16 | 贵州思特技术有限公司 | Mechanograph and preparation method thereof |
| CN107629474A (en) * | 2017-09-14 | 2018-01-26 | 贵州思特技术有限公司 | Mechanograph and preparation method thereof |
| CN112325574A (en) * | 2020-04-28 | 2021-02-05 | 胡力涛 | Material moisture content detection device for microwave technology |
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| US5658511A (en) * | 1994-05-20 | 1997-08-19 | Lignotock Gmbh | Method of manufacturing molded articles |
| CN100999091A (en) * | 2006-12-26 | 2007-07-18 | 南京林业大学 | Manufacturing method of wood/hybrid Chinese pennisetum composite artificial board |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104552528A (en) * | 2014-12-22 | 2015-04-29 | 浙江新木材料科技有限公司 | Cold pressing shock excitation forming and thermosetting method for wood fiber special-shaped workpiece |
| CN104526827B (en) * | 2014-12-25 | 2017-07-18 | 浙江新木材料科技有限公司 | A kind of wood-fibred shaped piece lamination thermal curing methods |
| CN104552547A (en) * | 2014-12-25 | 2015-04-29 | 浙江新木材料科技有限公司 | Equal-density paving and cold pressing method for wood fiber molded special-shaped parts |
| CN104552548A (en) * | 2014-12-25 | 2015-04-29 | 浙江新木材料科技有限公司 | Equal-pressure forming method of wood fiber molded special-shaped parts |
| CN104552547B (en) * | 2014-12-25 | 2017-01-25 | 浙江新木材料科技有限公司 | Equal-density paving and coldpressing method for wood fiber molded special-shaped parts |
| CN104526827A (en) * | 2014-12-25 | 2015-04-22 | 浙江新木材料科技有限公司 | Wood fiber special shaped workpiece laminated thermal fixation method |
| CN106042414A (en) * | 2016-05-29 | 2016-10-26 | 王正 | Automobile inner decoration mold-pressed profile preparation technique through wood fiber double mold pressing method |
| CN106079022A (en) * | 2016-06-15 | 2016-11-09 | 中南林业科技大学 | A kind of ultra-low formaldehyde release household material preparation method based on fast-growing grass |
| CN106079021A (en) * | 2016-06-15 | 2016-11-09 | 中南林业科技大学 | Prosthetic Form aldehyde release biology plate preparation method based on fast-growing grass |
| CN106079018A (en) * | 2016-06-15 | 2016-11-09 | 中南林业科技大学 | A kind of preparation method of prosthetic Form aldehyde release household material based on fast-growing grass |
| CN107586462A (en) * | 2017-09-14 | 2018-01-16 | 贵州思特技术有限公司 | Mechanograph and preparation method thereof |
| CN107629474A (en) * | 2017-09-14 | 2018-01-26 | 贵州思特技术有限公司 | Mechanograph and preparation method thereof |
| CN112325574A (en) * | 2020-04-28 | 2021-02-05 | 胡力涛 | Material moisture content detection device for microwave technology |
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Application publication date: 20140423 |
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