CN106696043B - Production method and production device of aldehyde-free reinforced wood floor - Google Patents
Production method and production device of aldehyde-free reinforced wood floor Download PDFInfo
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- CN106696043B CN106696043B CN201710010486.0A CN201710010486A CN106696043B CN 106696043 B CN106696043 B CN 106696043B CN 201710010486 A CN201710010486 A CN 201710010486A CN 106696043 B CN106696043 B CN 106696043B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
- B27M3/00—Manufacture or reconditioning of specific semi-finished or finished articles
- B27M3/04—Manufacture or reconditioning of specific semi-finished or finished articles of flooring elements, e.g. parqueting blocks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D5/00—Other working of veneer or plywood specially adapted to veneer or plywood
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
A production method and a production device of an aldehyde-free laminate flooring comprise a stacking rack, a belt conveyor, a hot press, a plate discharging conveyor, a plate cooling machine, a cold pressing roller press, a shaking conveyor, a stacking machine, a heating chamber, a first fan and a second fan which are arranged in sequence; an air collecting cover is arranged above the stacking rack; the heating chamber is provided with an air inlet and an air outlet; an induced draft cover is covered over the plate cooling machine, the top end of the induced draft cover is communicated with one end of a first fan, and the other end of the first fan is respectively communicated with the bottom of the stacking rack and an air inlet of the heating chamber through pipelines; one end of the second fan is communicated with the top end of the air collecting cover and the air outlet of the heating chamber respectively; the other end of the second fan is connected to the bottom of the plate cooling machine through a pipeline; the production device disclosed by the invention is simple in structure, can greatly shorten the hot pressing time, can quickly eliminate the internal stress of the plate, reduces the deformation of the plate, reduces the curing time of the plate, and greatly improves the yield and the productivity.
Description
Technical Field
The invention relates to a production device and a production method of an aldehyde-free laminate flooring.
Background
According to incomplete statistics of the China Association of forestry industries on the basis of the Committee for the Special floor industry, the total sales of floor enterprises with certain scale in China in 2015 is about 3.8 hundred million m2Wherein the laminate wood floor is about 2.1 hundred million m2Accounting for more than 55 percent of the total sales volume, is the most important product for floor sales. Because the intensified wooden floor is pressed by the hot press under high temperature and high pressure, huge internal stress is accumulated due to the difference of the internal temperature gradient and the water content gradient of the intensified wooden floor board, and the intensified wooden floor after hot pressing is cooled to a certain temperature and then is automatically pressedThe stacker stacks and sends the plates to an intermediate warehouse for storage, and the life cycle of the plates reaches more than 7 days, which causes high production and operation cost of enterprises. On the other hand, the existing hot pressing process has long time reaching 30-40 seconds (determined according to the thickness of the plate), and the production efficiency of the press is limited.
Disclosure of Invention
The invention aims to solve one of the technical problems and provides a production device of an aldehyde-free reinforced wood floor.
The invention is realized by the following steps: a production device of an aldehyde-free laminate flooring comprises a stacking rack, a belt conveyor, a hot press, a plate discharging conveyor, a plate cooling machine, a cold pressing roller press, a shaking conveyor, a stacking machine, a heating chamber, a first fan and a second fan which are sequentially arranged from front to back according to the movement direction of a base material; an air collecting cover is arranged above the stacking rack; the heating chamber is provided with an air inlet and an air outlet;
an induced draft cover is covered over the plate cooling machine, the top end of the induced draft cover is communicated with one end of a first fan, and the other end of the first fan is respectively communicated with the bottom of the stacking rack and an air inlet of the heating chamber through pipelines; one end of the second fan is communicated with the top end of the air collecting cover and the air outlet of the heating chamber respectively; the other end of the second fan is connected to the bottom of the plate cooling machine through a pipeline.
Preferably, a first valve is respectively arranged between the first fan and the stacking rack and between the first fan and an air inlet of the heating chamber; and a second valve is respectively arranged between the second fan and the air collecting cover and between the second fan and the air outlet of the heating chamber.
Preferably, the shaking conveyor comprises a first roller conveyor, a bracket and at least one vibration motor, the first roller conveyor is positioned above the bracket, and a plurality of springs are connected between the first roller conveyor and the bracket; the vibration motor is fixedly connected with the first roller conveyor, and when the first roller conveyor is in a working state, the first roller conveyor is driven by the vibration motor to shake and move forwards.
Preferably, the cold pressing roller press comprises a second roller conveyor, a pressure unit and a gap control unit; the pressure unit is positioned above the second roller conveyor and comprises two support frames, two hanging frames, a plurality of pressing rollers and a plurality of pressure control units; the plurality of pressing rollers are respectively arranged between the two support frames at intervals, and the two hanging frames are correspondingly arranged above the two support frames one by one; the plurality of pressure control units are arranged between the hanging bracket and the supporting frame at intervals; when in the working state, the substrate moves forward under the nip of the down-pressure roller and the second roller conveyor.
The second technical problem to be solved by the present invention is to provide a method for producing aldehyde-free laminate flooring.
The invention is realized by the following steps: the production method of the aldehyde-free laminate wood floor utilizes the production device of the aldehyde-free laminate wood floor to produce, and specifically comprises the following steps:
(1) placing the base material, the decorative paper, the impregnated balance paper and the wear-resistant paper in a heating chamber, introducing hot air collected from the upper part of a plate cooling machine into the heating chamber, and preheating the base material, the decorative paper, the impregnated balance paper and the wear-resistant paper to 40-60 ℃;
(2) transferring the preheated base material, decorative paper, impregnated balance paper and wear-resistant paper from a heating chamber to a stacking rack, and blowing hot air collected from the upper part of a plate cooling machine upwards from the bottom of the stacking rack to continuously keep the temperature of the base material, the decorative paper, the impregnated balance paper and the wear-resistant paper at 40-60 ℃;
(3) assembling the decorative paper, the impregnated balance paper, the wear-resistant paper and the base material, and conveying the assembled components into a hot press by a belt conveyor for hot pressing to obtain a plate, wherein the hot pressing parameters are as follows: the temperature is 180-220 ℃, the pressure is 14-23 MPa, and the time is 18-30 seconds;
(4) the plate discharging conveyor conveys the plates into a plate cooling machine for cooling, hot air is sucked out from an induced air cover above the plate cooling machine, and meanwhile, air collected by the stacking rack and an air outlet of the heating chamber is blown upwards from the bottom of the plate cooling machine; then, the plates sequentially enter a cold-pressing roller press for rolling, a shaking conveyor shakes, and finally the plates enter a stacker for cutting, cutting small plates, preserving health, forming and sealing edges;
wherein the rolling pressure of the cold-pressing roller press is 1MPa-5MPa, and the speed is 2.5m/min-5 m/min; the vibration amplitude of the plate is 1-2mm, and the frequency is 1-5 HZ.
The invention has the advantages that: the production device disclosed by the invention is simple in structure, the heat energy discharged in production is fully utilized, the hot-pressing heating time can be greatly shortened, the internal stress of the plate can be quickly eliminated, the deformation of the plate is reduced, the curing time of the plate is reduced, and the yield and the productivity are greatly improved; the laminated flooring for producing the melamine modified urea-formaldehyde glue can also reduce a certain amount of free formaldehyde.
Drawings
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of an apparatus for manufacturing an aldehyde-free laminate wood flooring according to the present invention.
Fig. 2 is a schematic view of the structure of the jiggling conveyor of the present invention.
FIG. 3 is a schematic view of the construction of the cold rolling mill of the present invention.
Detailed Description
Referring to fig. 1, 2 and 3, a production apparatus for an aldehyde-free laminate flooring comprises a stacking rack 1, a belt conveyor 2, a hot press 3, a board discharging conveyor 4, a board cooling machine 5, a cold pressing roller 6, a shaking conveyor 7, a stacker 8, a heating chamber 9, a first fan 10 and a second fan 11, which are sequentially arranged from front to back according to a movement direction of a substrate; a wind collecting cover 12 is arranged above the piling bin 1; the heating chamber 9 has an air inlet 91 and an air outlet 92.
Referring to fig. 1 again, an induced draft cover 51 is covered over the cold plate machine 5, the top end of the induced draft cover 51 is communicated with one end of a first fan 10, and the other end of the first fan 10 is respectively communicated with the bottom of the stacking rack 1 and an air inlet 91 of the heating chamber 9 through a pipeline; first valves (namely a first valve 101 and a first valve 102) are respectively arranged between the first fan 10 and the stacking rack 1 and between the first fan 10 and the air inlet 91 of the heating chamber 9.
One end of the second fan 11 is respectively communicated with the top end of the air collecting cover 12 and the air outlet 92 of the heating chamber 9; the other end of the second fan 11 is connected to the bottom of the cold plate machine 5 through a pipeline. A second valve (i.e. a second valve 111 and a second valve 112) is respectively arranged between the second fan 11 and the air-collecting cover 12 and between the second fan 11 and the air outlet 92 of the heating chamber 9.
Referring to fig. 2 again, the jiggling conveyor 7 includes a first roller conveyor 71, a bracket 72 and at least one vibration motor 73, the first roller conveyor 71 is located above the bracket 72, and a plurality of springs 74 are connected between the first roller conveyor 71 and the bracket 72; the vibration motor 73 is fixedly connected with the first roller conveyor 71, and when the first roller conveyor 71 is in a working state, the first roller conveyor 71 is driven by the vibration motor 73 to shake and move forwards.
Referring to fig. 3, the cold pressing roller 6 includes a second roller conveyor 61, a pressure unit 62 and a gap control unit (not shown); the pressure unit 62 is located above the second roller conveyor 61, and the pressure unit 62 comprises two support frames 621, two hangers 622, a plurality of pressing rollers 623 and a plurality of pressure control units 624; the plurality of lower pressure rollers 623 are respectively arranged between the two support frames 621 at intervals, and the two hanging brackets 622 are correspondingly arranged above the two support frames 621 one by one; the plurality of pressure control units 624 are arranged between the hanging frame 622 and the supporting frame 621 at intervals; when in the working state, the substrate is moved forward under the nip of the down-pressure roller 623 and the second roller conveyor 61. The plurality of lower rollers 623 press the substrate at a predetermined pressure, and the substrate moves forward by the upper and lower pressures of the lower rollers 623 and the second roller conveyor 61. The gap control unit is used to control the spacing between the pressure unit 62 and the second drum conveyor 61.
Referring to fig. 1, 2 and 3 again, the method for producing the aldehyde-free laminate flooring comprises the following steps:
(1) placing the base material, the decorative paper, the impregnated balance paper and the wear-resistant paper in a heating chamber 9, introducing hot air collected from the upper part of a cold plate machine 5 into the heating chamber 9, and preheating the base material, the decorative paper, the impregnated balance paper and the wear-resistant paper to 40-60 ℃; the base material is a high-density fiberboard produced and manufactured by using isocyanate formaldehyde-free adhesive, and the requirement of formaldehyde emission of the impregnated balance paper and the impregnated coating wood-grain paper layer is less than or equal to 0.5 mg/L.
(2) Transferring the preheated base material, decorative paper, impregnated balance paper and wear-resistant paper from a heating chamber 9 to a stacking rack 1, wherein the stacking rack 1 is divided into different interlayers for respectively placing the base material, the decorative paper, the impregnated balance paper and the wear-resistant paper, hot air collected from the upper part of a plate cooling machine 5 is blown upwards from two sides of the bottom of the stacking rack 1, and then the hot air is collected by a wind collecting cover 12 and introduced into the bottom of the plate cooling machine 5, so that the temperature of the impregnated paper, the impregnated balance paper, the wear-resistant paper and the base material is continuously kept at 40-60 ℃; the heat preservation is carried out before the pre-assembly of the impregnated paper, the impregnated balance paper, the wear-resistant paper and the base material is pressed and pasted, so that the hot-pressing heating time of the plate blank can be reduced; each valve is used for adjusting the air quantity.
(3) The impregnated paper, the impregnated balance paper, the wear-resistant paper and the base material are assembled and conveyed into a hot press 3 by a belt conveyer 2 for hot pressing to obtain a plate, and the hot pressing parameters are as follows: the temperature is 180-220 ℃, the pressure is 14-23 MPa, and the time is 18-30 seconds;
(4) the plate discharging conveyor 4 is used for conveying the plates into the plate cooling machine 5 for cooling, the temperature of the plates which are just discharged from the hot press 3 reaches 200 ℃, so the plates heat the air around the plate cooling machine 5, then the hot air is sucked out from the air inducing cover 51 above the plate cooling machine 5, and the cooled air collected by the stacking rack 1 and the air outlet 92 of the heating chamber 9 is blown upwards from two sides of the bottom of the plate cooling machine 5, so that the air can be heated more quickly, and the circulation amount of waste heat is increased; then, the plates sequentially enter a cold-pressing roller 6 for rolling, a shaking conveyor 7 for shaking, and finally enter a stacker 8 for cutting, splitting, preserving, forming and edge sealing; wherein the rolling pressure of the cold press 6 is 1MPa-5MPa, and the rolling speed is 2.5m/min-5 m/min; the vibration amplitude of the plate is 1-2mm, and the frequency is 1-5 HZ.
The cold pressing rolling and shaking of the plate are carried out because the temperature of the plate is rapidly reduced to room temperature from 200 ℃, the temperature difference change is large and fast, the cold pressing rolling and shaking can enable the plate to rapidly release internal stress, the plate is not easy to deform, meanwhile, the curing time can be greatly reduced, the curing time only needs 1-2 days, and the prior art needs more than 7 days.
The production device 100 disclosed by the invention is simple in structure, the heat energy discharged in production is fully utilized, the hot-pressing heating time can be greatly shortened, the internal stress of the plate can be quickly eliminated, the deformation of the plate is reduced, the curing time of the plate is shortened, and the yield and the productivity are greatly improved. Taking a laminate wood floor with a thickness of 12 mm as an example: the annual production is 100 ten thousand square meters, the hot pressing time of the existing process is longer and reaches 40 seconds, and the hot pressing time of the invention is 30 seconds. The time of the inherent opening and closing of the hot press is 5 seconds, and the original whole production cycle of each large plate (1.22 m multiplied by 2.44 m) is 40 seconds +5 seconds, and the total time is 45 seconds. The whole production period of each large plate in the process is 30 seconds +5 seconds, and the total time is 35 seconds. The pressing time of each large plate is reduced by 45 seconds to 35 seconds to 10 seconds. The hot-pressing production efficiency is improved by (45-35)/22.22% for 45 x 100%, and the annual yield is improved by (1+ 22.22%) x 100 122.22 ten thousand square meters.
Even if the laminate flooring using the production apparatus 100 of the present invention produces the melamine modified urea-formaldehyde glue, a certain amount of free formaldehyde can be reduced because a certain amount of free formaldehyde is volatilized during the preheating of the substrate and the decorative paper.
Claims (3)
1. The production method of the aldehyde-free laminate wood floor is characterized by comprising the following steps: the production device adopted by the production method is as follows: the device comprises a stacking rack, a belt conveyor, a hot press, a plate discharging conveyor, a cold plate machine, a cold pressing roller press, a shaking conveyor, a stacking machine, a heating chamber, a first fan and a second fan which are sequentially arranged from front to back according to the movement direction of a base material; a wind collecting cover is arranged above the stacking rack; the heating chamber is provided with an air inlet and an air outlet;
an induced draft cover is covered over the plate cooling machine, the top end of the induced draft cover is communicated with one end of a first fan, and the other end of the first fan is respectively communicated with the bottom of the stacking rack and an air inlet of the heating chamber through pipelines; one end of the second fan is communicated with the top end of the air collecting cover and the air outlet of the heating chamber respectively; the other end of the second fan is connected to the bottom of the plate cooling machine through a pipeline;
a first valve is respectively arranged between the first fan and the stacking rack and between the first fan and the air inlet of the heating chamber; a second valve is respectively arranged between the second fan and the air collecting cover and between the second fan and the air outlet of the heating chamber;
the production method specifically comprises the following steps:
(1) placing the base material, the decorative paper, the impregnated balance paper and the wear-resistant paper in a heating chamber, introducing hot air collected from the upper part of a plate cooling machine into the heating chamber, and preheating the base material, the decorative paper, the impregnated balance paper and the wear-resistant paper to 40-60 ℃;
(2) transferring the preheated base material, decorative paper, impregnated balance paper and wear-resistant paper from a heating chamber to a stacking rack, and blowing hot air collected from the upper part of a plate cooling machine upwards from the bottom of the stacking rack to continuously keep the temperature of the base material, the decorative paper, the impregnated balance paper and the wear-resistant paper at 40-60 ℃;
(3) assembling the decorative paper, the impregnated balance paper, the wear-resistant paper and the base material, and conveying the assembled components into a hot press by a belt conveyor for hot pressing to obtain a plate, wherein the hot pressing parameters are as follows: the temperature is 180-220 ℃, the pressure is 14-23 MPa, and the time is 18-30 seconds;
(4) the plate discharging conveyor conveys the plates into a plate cooling machine for cooling, hot air is sucked out from an induced air cover above the plate cooling machine, and meanwhile air collected by the stacking rack and an air outlet of the heating chamber is blown upwards from the bottom of the plate cooling machine; then, the plates sequentially enter a cold-pressing roller press for rolling, a shaking conveyor shakes, and finally the plates enter a stacker for cutting, cutting small plates, preserving health, forming and sealing edges;
wherein the rolling pressure of the cold-pressing roller press is 1MPa-5MPa, and the speed is 2.5m/min-5 m/min; the vibration amplitude of the plate is 1-2mm, and the frequency is 1-5 HZ.
2. The method for producing aldehyde-free laminate wood flooring according to claim 1, wherein: the shaking conveyor comprises a first roller conveyor, a bracket and at least one vibration motor, wherein the first roller conveyor is positioned above the bracket, and a plurality of springs are connected between the first roller conveyor and the bracket; the vibration motor is fixedly connected with the first roller conveyor, and when the first roller conveyor is in a working state, the first roller conveyor is driven by the vibration motor to shake and move forwards.
3. The method for producing aldehyde-free laminate wood flooring according to claim 1, wherein: the cold pressing roller press comprises a second roller conveyor, a pressure unit and a gap control unit; the pressure unit is positioned above the second roller conveyor and comprises two support frames, two hanging frames, a plurality of pressing rollers and a plurality of pressure control units; the plurality of pressing rollers are respectively arranged between the two support frames at intervals, and the two hanging frames are correspondingly arranged above the two support frames one by one; the plurality of pressure control units are arranged between the hanging bracket and the supporting frame at intervals; when in the working state, the substrate moves forward under the nip of the down-pressure roller and the second roller conveyor.
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| CN201710010486.0A CN106696043B (en) | 2017-01-06 | 2017-01-06 | Production method and production device of aldehyde-free reinforced wood floor |
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| CN201710010486.0A CN106696043B (en) | 2017-01-06 | 2017-01-06 | Production method and production device of aldehyde-free reinforced wood floor |
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| CN1565818A (en) * | 2003-07-02 | 2005-01-19 | 段素英 | Method for producing hard wood composite floor |
| CN201981243U (en) * | 2011-03-09 | 2011-09-21 | 贵州华科铝材料工程技术研究有限公司 | Stress removing platform |
| CN102211409B (en) * | 2011-05-27 | 2013-06-05 | 常州市华星新材料科技有限公司 | Continuous fiber base cloth and thermoplastic resin composite board molding equipment |
| KR20140067516A (en) * | 2012-11-26 | 2014-06-05 | 한국철도기술연구원 | System for treatment of waste wood sleeper using thermal abstraction, and method for the same |
| CN103934867B (en) * | 2014-05-16 | 2016-01-20 | 南京林业大学 | The associating preheating hot-press method that large gauge bamboo recombined material is continuously shaped |
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Address after: 366099 No. 568, North District, nege Industrial Park, Yong'an City, Sanming City, Fujian Province Patentee after: Fujian Yonglin HOME Furnishings Co.,Ltd. Address before: 366099 No. 568, North District, nege Industrial Park, Yong'an City, Sanming City, Fujian Province Patentee before: FUJIAN YONGLIN HOUSEHOLD Co.,Ltd. |