CN100365234C - Strengthened composite wood floor imitating to real wood, and preparation method - Google Patents
Strengthened composite wood floor imitating to real wood, and preparation method Download PDFInfo
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- CN100365234C CN100365234C CNB2004100814114A CN200410081411A CN100365234C CN 100365234 C CN100365234 C CN 100365234C CN B2004100814114 A CNB2004100814114 A CN B2004100814114A CN 200410081411 A CN200410081411 A CN 200410081411A CN 100365234 C CN100365234 C CN 100365234C
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Abstract
The present invention discloses an emulating solid wood reinforced composite floor board. The lateral surfaces of a board body are provided with spliced tenons and spliced grooves, and four edges of a transparent wearproof layer and a wood grain decorating layer of the board body are provided with shallow groove impressions with a small chamfering formed by mutually spliced with adjacent board bodies. The present invention also discloses an emulating solid wood reinforced composite floor board rolling and moulding manufacturing method. Firstly, a board blank is preheated, and then, the transparent wearproof layer and the wood grain decorating layer are rolled and moulded to form transverse shallow groove impressions with a small chamfering, and finally, the board blank is put into a floor board grooving machine to carry out tenoning, grooving and cutting machining, the four edges of the transparent wearproof layer and the wood grain decorating layer are provided with tenons and grooves, in the rolling manufacturing process, the board blank can be put into the floor board grooving machine for tenoning and grooving before preheated and impressed. The present invention has strong solid wood emulating sense and individuation style, can meet the requirements of special-grade users, and improves the performance properties of reinforced composite floor boards. The manufacturing method of the present invention is simple, the manufacturing devices are general-purpose devices, and the manufacturing method is favorable for being popularized and used by the existing reinforced composite floor board manufacturers.
Description
Technical field
The present invention relates to the manufacturing of extraordinary floorboards of wood member, especially relate to a kind of roll extrusion preparation method of strengthened composite wood floor imitating to real wood.
Background technology
Along with development economic and society, wooden floor has become the flooring and has decorated one of used important materials, has obtained extensive use.Wooden floor is to make after timber drying, the processing, has texture attractive in appearance, feel is comfortable, advantage safe in utilization, decorated style is recovered one's original simplicity, the texture nature, it is the ideal material of ground surface finishings such as bedroom, parlor, study, also the withed a hook at the end natural wood veins of wooden floor and the solid wooden compound floor of comfortable feel have the advantages that the expand with wet and contract with dry rate is little, dimensional stability is good, but price are too high.Because there is bigger gap in people's economic bearing; especially the angle from protecting forest resources; impel the lower reinforced composite wooden floor of price also to become popular floor decorative material; it is after logs such as small dimension wood, brushwood are pulverized; add adhesive glue, anticorrisive agent and additive; form through hot press HTHP compression process, generally by the transparent wear on surface successively with stacked composition of moistureproof balance layer of graining layer, substrate layer and bottom surface.It has broken the physical arrangement of log, overcome the weakness of log poor stability, have intensity height, wearing coefficient height, anticorrosion mothproof, and surfacing, have that embossment is planar, silk is planar, crystal is planar and various decorative patterns such as tiger fur shape, good decorating effect, the characteristics of easily maintaining, but feel is harder, especially there is little chamfering shallow slot unlike wooden floor at the assembly unit seam bar place of adjacent two floors, cause its imitative solid wood sense and personalized style still to dislike not enough, can not satisfy the consumer demand that some have special grade.
Summary of the invention
The technical problem to be solved in the present invention is to remedy the deficiencies in the prior art, proposes a kind of roll extrusion preparation method of strengthened composite wood floor imitating to real wood.
This strengthened composite wood floor imitating to real wood, plate body by the transparent wear on surface successively with the stacked reinforced composite wooden floor of forming of the moistureproof balance layer of graining layer, substrate layer and bottom surface, its side has tenon, the groove with the mutual assembly unit of adjacent plate body respectively.The transparent wear of described plate body and graining layer four edges, be provided with the mutual assembly unit of adjacent plate body and form little chamfering shallow slot impression.If the imitative solid wood line sense of the strengthened composite wood floor imitating to real wood that adopts is true to nature, the strengthened composite wood floor imitating to real wood of the present invention after the assembly unit just almost can be mixed the spurious with the genuine, and is on people's visual perception, as broad as long with wooden floor.
For the roll extrusion preparation method of strengthened composite wood floor imitating to real wood of the present invention, above-mentioned technical problem can be solved like this:
The roll extrusion preparation method of this strengthened composite wood floor imitating to real wood is characterized in having successively following steps:
Elder generation vertically is placed on the reinforced composite wooden floor slab on the roller conveyor and is preheated by the transparent wear and the graining layer of at least one group of preposition closely spaced preheating roller tube pair to slab, makes its temperature reach 160～220 ℃ that soften transparent wear and graining layer; Transparent wear is to be made by melamine glue, and hardness is very high at normal temperatures, has only it to be preheated softening, in compacting slab be full of cracks or melamine glue obscission the time can not take place.If pre-heating temperature is lower than 160 ℃, the requirement that the melamine softening degree can not chap, come off when not reaching compacting, and pre-heating temperature is higher than 220 ℃, melamine glue can run off again, and the floor scuff resistance is reduced.
The closely spaced impression roller pair that then that transparent wear and graining layer is softening slab is placed on the longitudinal rolling machine by postposition carries out roll extrusion, at transparent wear and the longitudinally little chamfering shallow slot impression of graining layer formation;
And then will be vertically roll extrusion have the slab of impression laterally to be placed on the roller conveyor to preheat, make its temperature reach 160～220 ℃ that soften transparent wear and graining layer by transparent wear and the graining layer of the big preheating roller tube pair of at least one group of preposition spacing to slab;
Then the slab that transparent wear and graining layer have been softened is placed on the horizontal roller and carries out roll extrusion by the big impression roller pair of the spacing of postposition, forms horizontal little chamfering shallow slot impression in transparent wear and graining layer;
At last will be the vertical, horizontal slab that carries out impression send into floor groove cutting machine and carry out mortise, fluting processing of cutting, the cutting line that adds man-hour is the center line of little chamfering shallow slot impression, makes the strengthened composite wood floor imitating to real wood that there is little chamfering at four edges.
Described little chamfering shallow slot impression is the little chamfering shallow slot of a V-arrangement or U-shaped impression, or by the little chamfering shallow slot of combination shape impression that V-arrangement or U-shaped developed into.
For the roll extrusion preparation method of strengthened composite wood floor imitating to real wood of the present invention, above-mentioned technical problem also can be solved like this:
The roll extrusion preparation method of this strengthened composite wood floor imitating to real wood is characterized in having successively following steps:
Earlier the reinforced composite wooden floor slab is sent into floor groove cutting machine, carry out mortise, fluting processing of cutting, leave tenon, groove on four limits;
The slab that to hold groove, tenon more successfully vertically is placed on the roller conveyor and is preheated by the transparent wear and the graining layer of at least one group of preposition closely spaced preheating roller tube pair to slab, makes its temperature reach 160～220 ℃ that soften transparent wear and graining layer;
Then that transparent wear and graining layer is softening slab is placed on the longitudinal rolling machine by the closely spaced impression roller pair of postposition and carries out roll extrusion along the edge, vertical both sides of slab, suppresses at the edge, floor in the assembly unit of adjacent two floors and stitches the little inclined-plane that the bar place forms vertical little chamfering shallow slot;
And then the slab that edge, vertical both sides has suppressed little inclined-plane laterally is placed on the roller conveyor by transparent wear and the graining layer of the big preheating roller tube pair of at least one group of preposition spacing to slab preheats, make its temperature reach softening transparent wear and graining layer 160～220 ℃;
Then that transparent wear and graining layer is softening slab is placed on the horizontal roller by the big impression roller pair of the spacing of postposition and carries out roll extrusion along the edge, horizontal both sides of slab, suppresses at the edge, floor in the assembly unit of adjacent two floors and stitches the little inclined-plane that the bar place forms horizontal little chamfering shallow slot.
Described little chamfering shallow slot impression is the little chamfering shallow slot of a V-arrangement or U-shaped impression, or by the little chamfering shallow slot of combination shape impression that V-arrangement or U-shaped developed into.
For the roll extrusion preparation method of strengthened composite wood floor imitating to real wood of the present invention, above-mentioned technical problem can also further be solved like this:
Described preposition preheating roller tube pair is two smooth rolls that lay respectively at reinforced composite wooden floor slab above and below, above the inner chamber of smooth roll hollow be provided with the heat conduction oil duct of circuitous circulation, the Temperature controlled heater that conduction oil is heated is equipped with.
The impression roller pair of described postposition is one to be positioned at above the reinforced composite wooden floor slab and pressure roller and that both sides have a thrust is positioned at smooth roll below the reinforced composite wooden floor slab.
The inner chamber of top pressure roller hollow preferably is provided with the heat conduction oil duct of circuitous circulation, is equipped with the Temperature controlled heater that conduction oil is heated.The pressure roller of impression roller pair is provided with heating component, can make the softening melamine wearing layer can hardening, and slab be full of cracks or melamine glue obscission can not take place when impression.
The thrust that described rearmounted pressure roller both sides have is the impression die head that can form V-arrangement or the little chamfering shallow slot of U-shaped impression, or can form the impression die head of the little chamfering shallow slot of the combination shape impression that is developed into by V-arrangement or U-shaped.
The spacing of the thrust that the rearmounted pressure roller both sides of described vertical, horizontal impression have equals wide, the length of reinforced composite wooden floor finished product, less than the width of reinforced composite wooden floor slab 4mm at least.Redundance is the allowance of follow-up fluting, tenon.
The center line of described front preheating process roller is overlapping with the center line of the impression roller pair of postposition.
The track that described front preheating process roller rolls preheating in steel slab surface is overlapping at the track of steel slab surface roll extrusion trace with rearmounted impression roller pair, and the front preheating process roller rolls preheating in steel slab surface track width is greater than the impression roller pair of the postposition track width at steel slab surface roll extrusion trace.
The track width that described front preheating process roller rolls preheating in steel slab surface is at least 2mm.
The impression roller pair of described postposition is at the track width of steel slab surface roll extrusion trace, and the width of promptly little chamfering shallow slot impression is at least 2.2mm.
The described slab that will carry out impression is sent into floor groove cutting machine and is carried out before mortise, the fluting processing of cutting, earlier slab is cooled to board briquette and the room temperature temperature difference≤1 ℃.Slab through the heating impression does not cool off, directly send into floor groove cutting machine and carry out mortise, fluting, there is the strengthened composite wood floor imitating to real wood of little chamfering at four edges that make, in cooling procedure, can deform, cause tenon, groove splicing back bigger slit to occur, some tenon, groove even can not splice have a strong impact on its functional performance.
Described is the nature cooling with the slab cooling, or the blowing cooling.
Preparation method of the present invention is fairly simple, and equipment is common apparatus mostly, helps existing reinforced composite wooden floor manufacturer and promotes employing.
Description of drawings
Accompanying drawing is the sectional drawing of the strengthened composite wood floor imitating to real wood of preparation method's manufacturing of the present invention.
The specific embodiment
Below the contrast accompanying drawing and in conjunction with the specific embodiment the invention will be further described.
To grow in advance * wide * the teak line reinforced composite wooden floor of thick 1222 * 2444 * 12mm of being, be split into the reinforced composite wooden floor slab of 27 lengths of a film * wide * thick 814 * 130 * 12mm of being.The wear-resisting value of this reinforced composite wooden floor is changeed greater than 6000.
Slab vertically is positioned on the preheating roller, and becoming two center symmetries, spacing in floor wearing layer Surface Machining is the little chamfering shallow slot of the V-arrangement impression of 124mm.
Again slab is placed horizontally on the preheating roller, is processed into two center symmetries again on wearing layer surface, floor, spacing is the little chamfering shallow slot of the V-arrangement impression of 810mm.
The slab that will carry out impression at last is deposited on the supporting plate, carry out the nature cooling, behind board briquette and the room temperature temperature difference≤1 ℃, slab is sent into floor groove cutting machine and carry out mortise, fluting processing of cutting, the cutting line that adds man-hour is the center line of little chamfering shallow slot impression, removing beyond the center line, center line makes the strengthened composite wood floor imitating to real wood that there is little chamfering at four edges with interior reservation.Finished product as shown in drawings, long * wide * thick be 810 * 124 * 12mm, 1 is wearing layer among the figure, the 2nd, little chamfering, the 3rd, groove, the 4th, tenon.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to the scope of patent protection that the present invention is determined by claims of being submitted to.
Claims (18)
1. the roll extrusion preparation method of a strengthened composite wood floor imitating to real wood is characterized in that: following steps are arranged successively:
Elder generation vertically is placed on the reinforced composite wooden floor slab on the roller conveyor and is preheated by the transparent wear and the graining layer of at least one group of preposition closely spaced preheating roller tube pair to slab, makes its temperature reach 160～220 ℃ that soften transparent wear and graining layer;
The closely spaced impression roller pair that then that transparent wear and graining layer is softening slab is placed on the longitudinal rolling machine by postposition carries out roll extrusion, at transparent wear and the longitudinally little chamfering shallow slot impression of graining layer formation;
And then will be vertically roll extrusion have the slab of impression laterally to be placed on the roller conveyor to preheat, make its temperature reach 160～220 ℃ that soften transparent wear and graining layer by transparent wear and the graining layer of the big preheating roller tube pair of at least one group of preposition spacing to slab;
Then the slab that transparent wear and graining layer have been softened is placed on the horizontal roller and carries out roll extrusion by the big impression roller pair of the spacing of postposition, forms horizontal little chamfering shallow slot impression in transparent wear and graining layer;
At last will be the vertical, horizontal slab that carries out impression send into floor groove cutting machine and carry out mortise, fluting processing of cutting, the cutting line that adds man-hour is the center line of little chamfering shallow slot impression, makes the strengthened composite wood floor imitating to real wood that there is little chamfering at four edges.
2. according to the roll extrusion preparation method of the described strengthened composite wood floor imitating to real wood of claim 1, it is characterized in that: described preposition preheating roller tube pair is two smooth rolls that lay respectively at reinforced composite wooden floor slab above and below, the inner chamber of top smooth roll hollow is provided with the heat conduction oil duct of circuitous circulation, is equipped with the Temperature controlled heater that conduction oil is heated.
3. according to the roll extrusion preparation method of claim 1 or 2 described strengthened composite wood floor imitating to real wood, it is characterized in that: the impression roller pair of described postposition is one to be positioned at above the reinforced composite wooden floor slab and pressure roller and that both sides have a thrust is positioned at smooth roll below the reinforced composite wooden floor slab, the inner chamber of top pressure roller hollow can be provided with the heat conduction oil duct of circuitous circulation, is equipped with the Temperature controlled heater that conduction oil is heated.
4. according to the roll extrusion preparation method of the described strengthened composite wood floor imitating to real wood of claim 3, it is characterized in that: the thrust that described rearmounted pressure roller both sides have is the impression die head that can form V-arrangement or the little chamfering shallow slot of U-shaped impression, or can form the impression die head of the little chamfering shallow slot of the combination shape impression that is developed into by V-arrangement or U-shaped.
5. according to the roll extrusion preparation method of the described strengthened composite wood floor imitating to real wood of claim 4, it is characterized in that: the spacing of the thrust that the rearmounted pressure roller both sides of described vertical, horizontal impression have, equal wide, the length of reinforced composite wooden floor finished product, less than the width of reinforced composite wooden floor slab 4mm at least.
6. according to the roll extrusion preparation method of the described strengthened composite wood floor imitating to real wood of claim 5, it is characterized in that: the center line of described front preheating process roller is overlapping with the center line of the impression roller pair of postposition.
7. according to the roll extrusion preparation method of the described strengthened composite wood floor imitating to real wood of claim 6, it is characterized in that: the track that described front preheating process roller rolls preheating in steel slab surface is overlapping at the track of steel slab surface roll extrusion trace with rearmounted impression roller pair, and the front preheating process roller rolls preheating in steel slab surface track width is greater than the impression roller pair of the postposition track width at steel slab surface roll extrusion trace.
8. according to the roll extrusion preparation method of the described strengthened composite wood floor imitating to real wood of claim 7, it is characterized in that: the described slab that will carry out impression is sent into floor groove cutting machine and is carried out before mortise, the fluting processing of cutting, earlier slab is cooled to board briquette and the room temperature temperature difference≤1 ℃.
9. according to the roll extrusion preparation method of the described strengthened composite wood floor imitating to real wood of claim 8, it is characterized in that: described is the nature cooling with the slab cooling, or the blowing cooling.
10. the roll extrusion preparation method of a strengthened composite wood floor imitating to real wood is characterized in that: following steps are arranged successively:
Earlier the reinforced composite wooden floor slab is sent into floor groove cutting machine, carry out mortise, fluting processing of cutting, leave tenon, groove on four limits;
The slab that to hold groove, tenon more successfully vertically is placed on the roller conveyor and is preheated by the transparent wear and the graining layer of at least one group of preposition closely spaced preheating roller tube pair to slab, makes its temperature reach 160～220 ℃ that soften transparent wear and graining layer;
Then that transparent wear and graining layer is softening slab is placed on the longitudinal rolling machine by the closely spaced impression roller pair of postposition and carries out roll extrusion along the edge, vertical both sides of slab, suppresses at the edge, floor in the assembly unit of adjacent two floors and stitches the little inclined-plane that the bar place forms vertical little chamfering shallow slot;
And then the slab that edge, vertical both sides has suppressed little inclined-plane laterally is placed on the roller conveyor by transparent wear and the graining layer of the big preheating roller tube pair of at least one group of preposition spacing to slab preheats, make its temperature reach softening transparent wear and graining layer 160～220 ℃;
Then that transparent wear and graining layer is softening slab is placed on the horizontal roller by the big impression roller pair of the spacing of postposition and carries out roll extrusion along the edge, horizontal both sides of slab, suppresses at the edge, floor in the assembly unit of adjacent two floors and stitches the little inclined-plane that the bar place forms horizontal little chamfering shallow slot.
11. roll extrusion preparation method according to the described strengthened composite wood floor imitating to real wood of claim 10, it is characterized in that: described preposition preheating roller tube pair is two smooth rolls that lay respectively at reinforced composite wooden floor slab above and below, the inner chamber of top smooth roll hollow is provided with the heat conduction oil duct of circuitous circulation, is equipped with the Temperature controlled heater that conduction oil is heated.
12. roll extrusion preparation method according to the described strengthened composite wood floor imitating to real wood of claim 11, it is characterized in that: the impression roller pair of described postposition is one to be positioned at above the reinforced composite wooden floor slab and pressure roller and that both sides have a thrust is positioned at smooth roll below the reinforced composite wooden floor slab, the inner chamber of top pressure roller hollow can be provided with the heat conduction oil duct of circuitous circulation, is equipped with the Temperature controlled heater that conduction oil is heated.
13. roll extrusion preparation method according to the described strengthened composite wood floor imitating to real wood of claim 12, it is characterized in that: the thrust that described rearmounted pressure roller both sides have is the impression die head that can form V-arrangement or the little chamfering shallow slot of U-shaped impression, or can form the impression die head of the little chamfering shallow slot of the combination shape impression that is developed into by V-arrangement or U-shaped.
14. roll extrusion preparation method according to the described strengthened composite wood floor imitating to real wood of claim 13, it is characterized in that: the spacing of the thrust that the rearmounted pressure roller both sides of described vertical, horizontal impression have, equal wide, the length of reinforced composite wooden floor finished product, less than the width of reinforced composite wooden floor slab 4mm at least.
15. the roll extrusion preparation method according to the described strengthened composite wood floor imitating to real wood of claim 14 is characterized in that: the center line of described front preheating process roller is overlapping with the center line of the impression roller pair of postposition.
16. roll extrusion preparation method according to the described strengthened composite wood floor imitating to real wood of claim 15, it is characterized in that: the track that described front preheating process roller rolls preheating in steel slab surface is overlapping at the track of steel slab surface roll extrusion trace with rearmounted impression roller pair, and the front preheating process roller rolls preheating in steel slab surface track width is greater than the impression roller pair of the postposition track width at steel slab surface roll extrusion trace.
17. roll extrusion preparation method according to the described strengthened composite wood floor imitating to real wood of claim 16, it is characterized in that: the described slab that will carry out impression is sent into floor groove cutting machine and is carried out before mortise, the fluting processing of cutting, earlier slab is cooled to board briquette and the room temperature temperature difference≤1 ℃.
18. the roll extrusion preparation method according to the described strengthened composite wood floor imitating to real wood of claim 17 is characterized in that: described is the nature cooling with the slab cooling, or the blowing cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100814114A CN100365234C (en) | 2004-12-01 | 2004-12-01 | Strengthened composite wood floor imitating to real wood, and preparation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100814114A CN100365234C (en) | 2004-12-01 | 2004-12-01 | Strengthened composite wood floor imitating to real wood, and preparation method |
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| Publication Number | Publication Date |
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| CN1760488A CN1760488A (en) | 2006-04-19 |
| CN100365234C true CN100365234C (en) | 2008-01-30 |
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| CNB2004100814114A Expired - Fee Related CN100365234C (en) | 2004-12-01 | 2004-12-01 | Strengthened composite wood floor imitating to real wood, and preparation method |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2289664A1 (en) * | 2009-09-01 | 2011-03-02 | Spanolux N.V. Div. Balterio | Method of manufacturing a covering panel with a profiled edge |
| CN103174280B (en) * | 2013-01-30 | 2015-05-27 | 仙居县德忆装饰材料有限公司 | Elastic plastic floor and manufacturing method thereof |
| JP6736556B2 (en) * | 2014-12-22 | 2020-08-05 | セラロック、イノベーション、アクチボラグ | Mechanical fixing system for floor panel |
| CN104912297B (en) * | 2015-06-30 | 2018-01-16 | 浙江晶通塑胶有限公司 | Chamfering latch floor production method |
| CN111535544A (en) * | 2020-04-14 | 2020-08-14 | 安徽优胜美新材料科技有限公司 | Plastic floor and production equipment and production process thereof |
| CN111702231A (en) * | 2020-07-09 | 2020-09-25 | 博深普锐高（上海）工具有限公司 | Processing technology of stone plastic floor lock catch |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003049530A (en) * | 2001-08-06 | 2003-02-21 | Toppan Printing Co Ltd | Floor material and its manufacturing method |
| JP2003300203A (en) * | 2002-04-09 | 2003-10-21 | Asahi Woodtec Corp | Flooring and method for manufacturing the same and floor structure |
| CN2608248Y (en) * | 2003-01-22 | 2004-03-31 | 葛跃进 | Mould pressing steet board of reinforced wood floor hot press machine |
| CN1485184A (en) * | 2003-01-22 | 2004-03-31 | 葛跃进 | Stiffened timber floor and the manufacturing method thereof |
| CN2756745Y (en) * | 2004-10-13 | 2006-02-08 | 赵永军 | Mould press groove plate |
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2004
- 2004-12-01 CN CNB2004100814114A patent/CN100365234C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003049530A (en) * | 2001-08-06 | 2003-02-21 | Toppan Printing Co Ltd | Floor material and its manufacturing method |
| JP2003300203A (en) * | 2002-04-09 | 2003-10-21 | Asahi Woodtec Corp | Flooring and method for manufacturing the same and floor structure |
| CN2608248Y (en) * | 2003-01-22 | 2004-03-31 | 葛跃进 | Mould pressing steet board of reinforced wood floor hot press machine |
| CN1485184A (en) * | 2003-01-22 | 2004-03-31 | 葛跃进 | Stiffened timber floor and the manufacturing method thereof |
| CN2756745Y (en) * | 2004-10-13 | 2006-02-08 | 赵永军 | Mould press groove plate |
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| CN1760488A (en) | 2006-04-19 |
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Assignee: Efloor (Gaungzhou) Timber Industry Co.,Ltd. Assignor: Zhou Zuquan Contract record no.: 2010440020083 Denomination of invention: Strengthened composite wood floor imitating to real wood, and preparation method Granted publication date: 20080130 License type: Exclusive License Open date: 20060419 Record date: 20100613 |
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Granted publication date: 20080130 Termination date: 20121201 |