CN102602112A - Method for improving stability of a die-molded composite door panel - Google Patents
Method for improving stability of a die-molded composite door panel Download PDFInfo
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- CN102602112A CN102602112A CN2012100559420A CN201210055942A CN102602112A CN 102602112 A CN102602112 A CN 102602112A CN 2012100559420 A CN2012100559420 A CN 2012100559420A CN 201210055942 A CN201210055942 A CN 201210055942A CN 102602112 A CN102602112 A CN 102602112A
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Abstract
The invention relates to a method for improving the stability of a die-molded composite door panel, which comprises the following four steps of: 1, selecting materials, to be specific, selecting a piece of melamine decorative paper and a middle-density fiberboard as materials for producing the die-molded composite door panel; 2, softening the middle-density fiberboard by spring an ammonia or urea solution; 3, limiting the depth and height of patterned fluctuation as well as a curvature radius of the patterned fluctuation transition of a mold; and 4, selecting a hot press for simultaneously closing multiple layers, setting high temperature and low temperature for press plates of the hot press at intervals one by one in die molding, doing different arrangements on a pavement sequence of raw materials on a high-temperature press plate and a low-temperature press plate, and giving special parameters to a closing speed, pressure, pressure holding time and pressure reduction speed in the pressurizing process so as to solve the stress balance problem of the die-molded composite door panel on different aspects. According to the invention, a set of feasible method is provided to guarantee the flatness of the die-molded composite door panel, reduce the fracture damage and guarantee the product quality.
Description
Technical field
The present invention relates to a kind of processing of laminate, specifically is to improve a kind of method with melamine facing paper and medium density fibre board (MDF) mold pressing composite gate panel stability.
Background technology
The panel of wooden decorative door in recent years comes into vogue and makes with the mold pressing composite plate of melamine facing paper and medium density fibre board (MDF); Advantages such as this forming laminated sheet material is wear-resisting because of melamine facing paper any surface finish, process equipment and technology simple, the mold pressing decorative pattern is various informative; Receive the favor of wooden composite door and ornament materials manufacturing enterprise; But because the ductility of the material of two layer materials, density, thickness, expansion and contraction, moisture expansion and drying shrinkage property, mold pressing etc. are multifactorial asymmetric; Cause the poor stability of the whole plate of this composite plate, easy buckling deformation, make the composite gate that makes also cause distortion, even influence is used.The compound rear stability difference of melamine facing paper and medium density fibre board (MDF) is a difficult problem, does not see the relevant report that overcomes this difficult problem so far.CN100408288 has announced Mr.'s Qian Jun the heat pressing process of stability of composite plate made from solid wood " improve " patented technology; Be merely from heat pressing process; Propose to improve the technology opinion of stability of composite plate made from solid wood, this patented technology still can not all solve the stable series of technical of two layers of mold pressing composite gate panel that the application is directed against.
Summary of the invention
The technical problem that the present invention will solve provides a kind of method that improves composite gate panel stability.
Solving this technical problem the technical scheme that is adopted is:
1, select materials: selecting thickness for use is that 4-6mm, moisture content are the medium density fibre board (MDF) of 9%-12%; Select 80g/m for use
2-100g/m
2The 200-300 g/m that facing paper is processed after in melamine, flooding
2The melamine facing paper;
2, the preliminary treatment of medium density fibre board (MDF): spray concentration is the ammoniacal liquor of 2.5%-3.0% (mass ratio) on the one side that medium density fibre board (MDF) will be pasted with the melamine facing paper, and discharge rate is 50-80g/m
2, or the spray concentration be the urea liquid of 20%-30% (mass ratio), discharge rate is 70-100g/m
2, the ammoniacal liquor or the spray concentration that are 2.5%-3.0% in non-stickup face spray concentration are the urea liquid of 20%-30%, discharge rate is 250-400 g/m
2Display a period of time after the spray, the concrete time of displaying changes by environment temperature and humidity, and is selected in 25-60min;
3, to the requirement of mould relative dimensions: the 1.5-2.0 that the concavo-convex degree of depth of decorative pattern and height should be less than or equal to the medium density fiber plate thickness on the mould doubly; Thickness is 5-6mm, gets 1.5-1.7 doubly, and thickness is 4-5mm, gets 1.8-2.0 doubly, and the concavo-convex transition radius of curvature of decorative pattern should be greater than 4 times of fiberboard thickness;
4, mold pressing: select simultaneously closed multi-daylight press for use, earlier with former and formpiston respectively with the last lower platen amalgamation of this press, again to the pressing plate heat supply, also need handle following three production links well:
(1) the temperature setting of closed multi-daylight press simultaneously: the temperature of adjacent pressing plates is provided with by one high and one low interval, and high temperature is 155-175 ℃, and low temperature is 135-150 ℃;
(2) order of mating formation: the low temperature pressing plate pastes by facing paper with melamine mutually, and the medium density fiber plate of mating formation is placed on the melamine facing paper, and mating formation on the high temperature pressing plate is in proper order then opposite, treating all mats formation finish after, send in the multi-daylight press simultaneously;
(3) exert pressure: in a single day top board contacts with slab, and the 10-15s that pauses immediately is closed with the speed of 0.15-0.20mm/s again, stops during for 2.5-3.0MPa up to pressure, keeps 60-100s, is depressurized to zero back ejecting plate with the speed of 0.10-0.15MPa/s again.
The invention has the beneficial effects as follows from select materials, the preliminary treatment of medium density fibre board (MDF), the temperature setting of pressing plate and the method that the aspects such as order, the parameter of exerting pressure of mating formation have proposed the stress equilibrium of a series of this mold pressing of solution composite gate panels during to the restriction of concavo-convex size of mould and knuckle radius thereof, mold pressing; Reduced buckling deformation; Cracking when reducing mold pressing is damaged, has improved composite gate panel product output.
The specific embodiment
Below in conjunction with embodiment the present invention is described in further detail:
1, select materials: selecting thickness for use is that 4-6mm, moisture content are the medium density fibre board (MDF) of 9%-12%; Select 80-100g/m for use
2The 200-300 g/m that facing paper is processed after in melamine, flooding
2The melamine facing paper; Material choice not only will satisfy the requirement of composite gate panel to thickness and surface smoothness and wearability, and being limited with of thickness and grammes per square metre is beneficial to minimizing cracking and damaged when mold pressing.
2, the preliminary treatment of medium density fibre board (MDF): spray concentration is the ammoniacal liquor of 2.5%-3.0% (mass ratio) on the one side of desiring to paste with the melamine facing paper at medium density fibre board (MDF), and discharge rate is 50-80g/m
2, or the spray concentration be the urea liquid of 20%-30% (mass ratio), discharge rate is 70-100g/m
2, the ammoniacal liquor or the spray concentration that are 2.5%-3.0% in non-stickup face spray concentration are the urea liquid of 20%-30%, discharge rate is 270-400 g/m
2Display a period of time after the spray, the concrete time of displaying changes by environment temperature and humidity, and is selected in 25-60min; Spray ammoniacal liquor and urea liquid are to be softening medium density fibre board (MDF), the moisture content on surface when high-temperature pressurizing easy rapid osmotic be heated to the medium-density plate middle part, help softening sheet material equally, the stress during the minimizing mold pressing; Few with discharge rate of melamine facing paper stickup; Be because the steam of face is not easy to discharge in this surface heating and pressurizing; Too high moisture content can influence their gummed, and the opposite side discharge rate height of medium density fibre board (MDF) helps the balancing water content of medium density fibre board (MDF) after quick transmission and the mold pressing of temperature in the mold process.
3, to the requirement of mould relative dimensions: the 1.5-2.0 that the concavo-convex degree of depth of decorative pattern and height should be less than or equal to the medium density fiber plate thickness on the mould doubly; Thickness is 5-6 mm; Get 1.5-1.7 doubly; Thickness is 4-5mm, gets 1.8-2.0 doubly, and the concavo-convex transition radius of curvature of decorative pattern should be greater than 4 times of fiberboard thickness; Purpose is that to reduce in the mold process cracking of medium density fibre board (MDF) and melamine facing paper damaged, reduces the stress of mold pressing distortion back generation simultaneously.
4, mold pressing: select simultaneously closed multi-daylight press for use, earlier with former and formpiston respectively with the last lower platen amalgamation of this press, again to the pressing plate heat supply, also need handle following three production links well:
(1) the temperature setting of hot press: the temperature of adjacent pressing plates is provided with by one high and one low interval, and high temperature is 155-175 ℃, and low temperature is 135-150 ℃; This setting is for adapting to the different of the expanding with heat and contract with cold of melamine facing paper and medium density fibre board (MDF), moisture expansion and drying shrinkage character.
(2) mat formation in proper order: the low temperature pressing plate pastes with the melamine facing paper mutually; Medium density fibre board (MDF) is mated formation on the melamine facing paper; The order of mating formation on the high temperature pressing plate is then opposite, and mating formation like this is for the expansion and contraction that adapts to the melamine facing paper needs greater than this characteristic of expansion and contraction of medium density fibre board (MDF).Treating all mats formation finish after, send into together in the simultaneously closed multi-daylight press, make all slab heating and pressurizing times even.
(3) exert pressure: in a single day top board contacts with slab, and the 10-15s that pauses immediately is to carry out rapidly pre-warming to composite plate blanks; Through the big humidity on medium density fibre board (MDF) surface, temperature is sent to the middle part of medium density fibre board (MDF), softening medium density fibre board (MDF) fast; Control deformation velocity with the speed closure of 0.15-0.20mm/s again, this is in order to reduce distortional stress better, the plasticizing deformable material; Stop during up to pressure, keep 60-100s for 2.5-3.0MPa so that by glueing material fully near; Gluing and solidifying; Be depressurized to zero back ejecting plate with the speed of 0.10-0.15MPa/s again, slowly discharge compression stress when purpose is step-down, reduce the influence of steam pressure simultaneously glue-line.
Composite panel with this method is molded into melamine facing paper and medium density fibre board (MDF) not only is suitable for the panel of making door, also is applicable to and makes interior decoration property wallboard, top board etc.
Claims (1)
1. one kind is improved the stable method of mold pressing composite gate panel, is characterized in carrying out as follows:
One, select materials: selecting thickness for use is that 4-6mm, moisture content are the medium density fibre board (MDF) of 9%-12%; Select 80g/m for use
2-100g/m
2The 200-300 g/m that facing paper is processed after in melamine, flooding
2The melamine facing paper;
Two, the preliminary treatment of medium density fibre board (MDF): spray concentration is the ammoniacal liquor of 2.5%-3.0% (mass ratio) on the one side that medium density fibre board (MDF) will be pasted with the melamine facing paper, and discharge rate is 50-80g/m
2, or the spray concentration be the urea liquid of 20%-30% (mass ratio), discharge rate is 70-100g/m
2, the ammoniacal liquor or the spray concentration that are 2.5%-3.0% in non-stickup face spray concentration are the urea liquid of 20%-30%, discharge rate is 250-400 g/m
2Display a period of time after the spray, the concrete time of displaying changes by environment temperature and humidity, and is selected in 25-60min;
Three, to the requirement of mould relative dimensions: the 1.5-2.0 that the concavo-convex degree of depth of decorative pattern and height should be less than or equal to the medium density fiber plate thickness on the mould doubly; Thickness is 5-6mm, gets 1.5-1.7 doubly, and thickness is 4-5mm, gets 1.8-2.0 doubly, and the concavo-convex transition radius of curvature of decorative pattern should be greater than 4 times of fiberboard thickness;
Four, mold pressing: select simultaneously closed multi-daylight press for use, earlier with former and formpiston respectively with the last lower platen amalgamation of this press, again to the pressing plate heat supply, also need handle following three production links well:
(1) the temperature setting of closed multi-daylight press simultaneously: the temperature of adjacent pressing plates is provided with by one high and one low interval, and high temperature is 155-175 ℃, and low temperature is 135-150 ℃;
(2) order of mating formation: the low temperature pressing plate pastes by facing paper with melamine mutually, and medium density fibre board (MDF) is mated formation on the melamine facing paper, and mating formation on the high temperature pressing plate is in proper order then opposite, treating all mats formation finish after, send in the multi-daylight press simultaneously;
(3) exert pressure: in a single day top board contacts with slab, and the 10-15s that pauses immediately is closed with the speed of 0.15-0.20mm/s again, stops during for 2.5-3.0MPa up to pressure, keeps 60-100s, is depressurized to zero back ejecting plate with the speed of 0.10-0.15MPa/s again.
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| CN201210055942.0A CN102602112B (en) | 2012-03-06 | 2012-03-06 | Method for improving stability of a die-molded composite door panel |
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| CN201210055942.0A CN102602112B (en) | 2012-03-06 | 2012-03-06 | Method for improving stability of a die-molded composite door panel |
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| CN102602112B CN102602112B (en) | 2014-07-09 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102953644A (en) * | 2012-11-08 | 2013-03-06 | 江山市永龙木业有限公司 | Manufacturing method of melamine molding and assembling door |
| CN102950627A (en) * | 2012-11-08 | 2013-03-06 | 江山市永龙木业有限公司 | Method for improving concave-convex modeling depth of tripolycyanamide molded panel |
| CN103302717A (en) * | 2013-07-02 | 2013-09-18 | 廊坊尊望木门有限公司 | Mold-pressed door skin manufacturing technique imitating model of concave-convex carved solid door |
| CN103624842A (en) * | 2012-08-22 | 2014-03-12 | 左尚明舍家居用品（上海）有限公司 | Board product and related manufacturing method thereof |
| CN103659996A (en) * | 2012-08-31 | 2014-03-26 | 江苏肯帝亚木业有限公司 | Manufacturing technique for laminate floor |
| CN108556089A (en) * | 2018-02-26 | 2018-09-21 | 赖东 | A kind of environment-friendly type raw wooden skin synthesis technology |
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|---|---|---|---|---|
| JPH03183513A (en) * | 1982-03-08 | 1991-08-09 | Ibiden Co Ltd | Manufacture of endless melamine resin decorative sheet |
| CN1803423A (en) * | 2006-01-24 | 2006-07-19 | 杜官本 | Heat pressing process for promoting artificial plate property |
| CN1958257A (en) * | 2006-05-29 | 2007-05-09 | 钱俊 | Hot pressing technique for raising stability of composite plate made from solid wood |
| CN101474808A (en) * | 2009-01-23 | 2009-07-08 | 桦甸市惠邦木业有限责任公司 | Melamine facing molding fibreboard and processing technique |
-
2012
- 2012-03-06 CN CN201210055942.0A patent/CN102602112B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03183513A (en) * | 1982-03-08 | 1991-08-09 | Ibiden Co Ltd | Manufacture of endless melamine resin decorative sheet |
| CN1803423A (en) * | 2006-01-24 | 2006-07-19 | 杜官本 | Heat pressing process for promoting artificial plate property |
| CN1958257A (en) * | 2006-05-29 | 2007-05-09 | 钱俊 | Hot pressing technique for raising stability of composite plate made from solid wood |
| CN101474808A (en) * | 2009-01-23 | 2009-07-08 | 桦甸市惠邦木业有限责任公司 | Melamine facing molding fibreboard and processing technique |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103624842A (en) * | 2012-08-22 | 2014-03-12 | 左尚明舍家居用品（上海）有限公司 | Board product and related manufacturing method thereof |
| CN103659996A (en) * | 2012-08-31 | 2014-03-26 | 江苏肯帝亚木业有限公司 | Manufacturing technique for laminate floor |
| CN102953644A (en) * | 2012-11-08 | 2013-03-06 | 江山市永龙木业有限公司 | Manufacturing method of melamine molding and assembling door |
| CN102950627A (en) * | 2012-11-08 | 2013-03-06 | 江山市永龙木业有限公司 | Method for improving concave-convex modeling depth of tripolycyanamide molded panel |
| CN102953644B (en) * | 2012-11-08 | 2014-12-24 | 江山市永龙木业有限公司 | Manufacturing method of melamine molding and assembling door |
| CN102950627B (en) * | 2012-11-08 | 2015-06-24 | 江山市永龙木业有限公司 | Method for improving concave-convex modeling depth of tripolycyanamide molded panel |
| CN103302717A (en) * | 2013-07-02 | 2013-09-18 | 廊坊尊望木门有限公司 | Mold-pressed door skin manufacturing technique imitating model of concave-convex carved solid door |
| CN108556089A (en) * | 2018-02-26 | 2018-09-21 | 赖东 | A kind of environment-friendly type raw wooden skin synthesis technology |
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|---|---|
| CN102602112B (en) | 2014-07-09 |
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Application publication date: 20120725 Assignee: Jiangshan Oupai Door Industry Co., Ltd. Assignor: Zhejiang A & F University Contract record no.: 2017330000044 Denomination of invention: Method for improving stability of a die-molded composite door panel Granted publication date: 20140709 License type: Common License Record date: 20170406 Application publication date: 20120725 Assignee: Jiangshan City Forestry Industry Association Assignor: Zhejiang A & F University Contract record no.: 2017330000038 Denomination of invention: Method for improving stability of a die-molded composite door panel Granted publication date: 20140709 License type: Common License Record date: 20170406 |