CN103950083B - Agricultural crop straw flakeboard laying device - Google Patents
Agricultural crop straw flakeboard laying device Download PDFInfo
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- CN103950083B CN103950083B CN201410203246.9A CN201410203246A CN103950083B CN 103950083 B CN103950083 B CN 103950083B CN 201410203246 A CN201410203246 A CN 201410203246A CN 103950083 B CN103950083 B CN 103950083B
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- mating formation
- roller
- laying device
- agricultural crop
- crop straw
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Abstract
The invention discloses a kind of agricultural crop straw flakeboard laying device, comprise the supplied materials mouth being positioned at feeding station, the brace table being positioned at station of mating formation and the feed mechanism for material to be transported to station of mating formation from feeding station, the top of brace table is provided with the first lift drive mechanism of frame lifting of mating formation for mat formation frame and driving that flakeboard is shaping, the second lift drive mechanism that the top of mating formation frame is provided with pressing plate and drives pressing plate to be elevated, laying device is also provided with the connecting gear for being transported to by backing plate on brace table.The present invention has that structure is simple, with low cost, floor space is little, efficiency of mating formation is high, is easy to manipulation, integration can complete and mat formation and the advantage such as precompressed.
Description
Technical field
The present invention relates to wood-based plate manufacturing technology field, be specifically related to a kind of agricultural crop straw flakeboard laying device.
Background technology
Agricultural crop straw flakeboard is mated formation flooring modes such as mainly comprising machinery is mated formation, airflow pavement, machinery-airflow pavement.These flooring modes are all to mat formation and precompressed split is carried out, and have that floor space is large, system complex of mating formation, and Design and manufacture high in cost of production shortcoming, for the manufacturer that some scales of investment are less, equipment and factory building investment burden larger.Therefore, simple, that design and manufacture cost is lower agricultural crop straw flakeboard system and method for mating formation is developed significant.
Summary of the invention
The technical problem to be solved in the present invention overcomes the deficiency that prior art exists, and provides that a kind of structure is simple, with low cost, floor space is little, efficiency of mating formation is high, is easy to manipulate, integration can complete and mat formation and the agricultural crop straw flakeboard laying device of precompressed.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A kind of agricultural crop straw flakeboard laying device, comprise the supplied materials mouth being positioned at feeding station, the brace table being positioned at station of mating formation and the feed mechanism for material to be transported to station of mating formation from feeding station, the top of described brace table is provided with the first lift drive mechanism for shaping mat formation frame and the frame lifting of mating formation described in driving of flakeboard, the second lift drive mechanism that the top of described frame of mating formation is provided with pressing plate and drives described pressing plate to be elevated, described laying device is also provided with the connecting gear for being transported to by backing plate on brace table.
As a further improvement on the present invention:
Described connecting gear comprises makes backing plate support to elasticity conveying member on brace table by the effect of pressing plate downforce.
Described elasticity conveying member is belt conveyor, and described belt conveyor is located at directly over described brace table, and described belt conveyor is connected with a belt drives assembly and by the conveying backing plate of described belt drives Component driver discontinuous.
Described first lift drive mechanism comprises two telescopic oil cylinders, the both sides of frame of mating formation described in described two telescopic oil cylinders are connected to; Described second lift drive mechanism is plunger cylinder.
The driven in translation assembly that described feed mechanism comprises the spreading head for putting material and is connected with spreading head, described spreading head is provided with the material-holding chamber of up/down perforation, the upper and lower of described material-holding chamber is respectively equipped with one group of roller group, each group of roller group comprises and being arranged side by side and spaced multiple rollers of mating formation, described in roller of mating formation be provided with roller thorn.
Be arranged in the roller group on material-holding chamber top, described multiple roller of mating formation is divided into two groups, and two groups of rollers of mating formation are symmetrical arranged and are driven by independently driven unit respectively; Described two groups of rollers of mating formation rotate backward.
Be arranged in the roller group of material-holding chamber bottom, all rollers of mating formation all are connected with same driven unit, and drive rotating in same direction by described driven unit.
Described driven in translation assembly comprises guide rail, road wheel and ground drive mechanism, one end of described guide rail is positioned at the below of supplied materials mouth, the other end of described guide rail is positioned at the top of brace table, described spreading head is installed on described guide rail by described road wheel, and described ground drive mechanism is connected with road wheel and drives spreading head to move back and forth along guide rail.
Described roller of mating formation establishes multiple roller to sting circle in interval vertically, and each roller thorn circle comprises the many roller thorns arranged around roller of mating formation; Be arranged in the roller group of material-holding chamber bottom, adjacent roller thorn circle of mating formation on roller is arranged in the mode of patho-occlusion.
Be arranged in the roller group on material-holding chamber top, the diameter of roller of respectively mating formation is 160mm ~ 480mm, and adjacent spacing of mating formation between roller is 40mm ~ 120mm; Be arranged in the roller group of material-holding chamber bottom, the diameter of roller of respectively mating formation is 100mm ~ 300mm, and adjacent spacing of mating formation between roller is 120mm ~ 360mm; The length of described roller thorn is 15mm ~ 45mm, and the spacing between same adjacent two rollers thorn circle of mating formation on roller is 5 ~ 20mm.
Compared with prior art, the invention has the advantages that: agricultural crop straw flakeboard laying device of the present invention, integration can complete mating formation and precompressed to agricultural crop straw, solve traditional flooring mode because need separately carry out mating formation and precompressed and causing mats formation that efficiency is low, occupation area of equipment is large, the complicated loaded down with trivial details problem of manual operation, it has, and structure is simple, floor space is little, efficiency of mating formation is high, be easy to the advantage manipulating, be conducive to realizing Automated condtrol; Meanwhile, the manufacturing cost of this laying device also reduces greatly, and mating formation with common flakeboard to reduce 50% compared with system nearly.
Accompanying drawing explanation
Fig. 1 is the structural representation that agricultural crop straw flakeboard laying device of the present invention is in material loading state.
Fig. 2 is the structural representation that agricultural crop straw flakeboard laying device of the present invention is in discharging state.
Fig. 3 is the structural representation that agricultural crop straw flakeboard laying device of the present invention is in preloading condition.
Fig. 4 is the structural representation that agricultural crop straw flakeboard laying device of the present invention is in reset mode.
Fig. 5 is the upper structural representation arranging roller of mating formation in agricultural crop straw flakeboard laying device of the present invention.
Fig. 6 is the lower structural representation arranging roller of mating formation in agricultural crop straw flakeboard laying device of the present invention.
Fig. 7 is the structure for amplifying schematic diagram at A place in Fig. 6.
Marginal data:
1, supplied materials mouth; 2, brace table; 3, feed mechanism; 31, spreading head; 311, material-holding chamber; 312, to mat formation roller; 313, roller thorn; 314, drive motors; 315, chain-drive mechanism; 32, driven in translation assembly; 321, guide rail; 322, road wheel; 4, to mat formation frame; 5, backing plate; 6, pressing plate; 7, the second lift drive mechanism; 8, connecting gear; 81, belt conveyor.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in Figures 1 to 4, agricultural crop straw flakeboard laying device of the present invention, comprise supplied materials mouth 1, brace table 2 and feed mechanism 3, supplied materials mouth 1 is positioned at feeding station, for being sent by agricultural crop straw; Brace table 2 is positioned at station of mating formation, and for coordinating, agricultural crop straw is pressed into flakeboard in advance; Feed mechanism 3 is for being transported to from feeding station station of mating formation by material (agricultural crop straw).The top of brace table 2 is provided with mat formation frame 4 and the first lift drive mechanism, and the first lift drive mechanism and frame 4 two telescopic oil cylinder (not shown) of mating formation, two telescopic oil cylinders are connected to the both sides of frame 4 of mating formation, and frame 4 of mating formation can be driven to move up and down.The mat formation top of frame 4 is provided with pressing plate 6 and the second lift drive mechanism 7, second lift drive mechanism 7 is plunger cylinder, and it is connected with pressing plate 6 and pressing plate 6 can be driven to move up and down.Laying device is also provided with connecting gear 8, and backing plate 5 can be transported on brace table 2 by connecting gear 8, and frame 4 of mating formation, backing plate 5 and pressing plate 6 coordinate agricultural crop straw is pressed into flakeboard in advance.Agricultural crop straw flakeboard laying device of the present invention, integration can complete mating formation and precompressed to agricultural crop straw, solve traditional flooring mode because need separately carry out mating formation and precompressed and causing mats formation that efficiency is low, occupation area of equipment is large, the complicated loaded down with trivial details problem of manual operation, it has, and structure is simple, floor space is little, efficiency of mating formation is high, be easy to the advantage manipulating, be conducive to realizing Automated condtrol; Meanwhile, the manufacturing cost of this laying device also reduces greatly, and mating formation with common flakeboard to reduce 50% compared with system nearly.
In the present embodiment, connecting gear 8 comprises makes backing plate 5 support to elasticity conveying member on brace table 2 by the effect of pressing plate 6 downforce, elasticity conveying member is belt conveyor 81, the middle part of belt conveyor 81 is positioned at directly over brace table 2, its upper surface being close to brace table 2 is run, when pressing plate 6 presses down, belt conveyor 81 can be made to rely on natural resiliency to be out of shape the upper surface clinging to brace table 2, thus make to support on brace table 2 across belt conveyor 81 between backing plate 5.Belt conveyor 81 is connected with a belt drives assembly, and belt drives assembly can drive the conveying backing plate 5 of belt conveyor 81 discontinuous, and during work, backing plate 5 constantly adds on belt conveyor 81, and adjacent backing plate 5 be between across being placed on belt conveyor 81.This connecting gear 8 specifically can adopt wide belt conveyer, and its length is 12000mm, and width is 1400mm.
In the present embodiment, the driven in translation assembly 32 that feed mechanism 3 comprises spreading head 31 and is connected with spreading head 31, spreading head 31 can be contained loading and unloading and puts material, driven in translation assembly 32 comprises guide rail 321, road wheel 322 and ground drive mechanism (not shown), one end of guide rail 321 is positioned at the below of supplied materials mouth 1, the other end of guide rail 321 is positioned at the top of brace table 2, spreading head 31 is installed on guide rail 321 by road wheel 322, ground drive mechanism is connected with road wheel 322 and drives spreading head 31 to move back and forth along guide rail 321, ground drive mechanism can adopt motor and chain drive to rotate walking to order about road wheel 322 at guide rail 321.During convey materials, ground drive mechanism drives spreading head 31 to move to the below of supplied materials mouth 1 along guide rail 321, material is fallen spreading head 31 from supplied materials mouth 1, and ground drive mechanism drives spreading head 31 to move to the top of brace table 2 along guide rail 321, and spreading head 31 unloads as required again puts material.
The concrete structure of spreading head 31 is: spreading head 31 is provided with the material-holding chamber 311 of up/down perforation, the upper and lower of material-holding chamber 311 is respectively equipped with one group of roller group, each group of roller group comprises and being arranged side by side and spaced multiple rollers 312 of mating formation, and the material-holding chamber 311 between two groups of roller groups is the spatial accommodation of material.Roller 312 of mating formation establishes multiple roller to sting circle in interval vertically, and each roller thorn circle comprises the many roller thorns 313 arranged around roller 312 of mating formation, and the length of roller thorn 313 is 15mm ~ 45mm, and the spacing between same adjacent two rollers thorn circle of mating formation on roller 312 is 5 ~ 20mm.
Wherein, be arranged in the roller group on material-holding chamber 311 top, the diameter of roller 312 of respectively mating formation is 160mm ~ 480mm, and adjacent spacing of mating formation between roller 312 is 40mm ~ 120mm; Multiple roller 312 of mating formation is divided into two groups, and two groups of rollers 312 of mating formation are symmetrical arranged and are driven by independently driven unit respectively; Driven by driven unit when two groups of rollers 312 of mating formation work and rotate backward, as shown in Figure 5.Like this, the agricultural crop straw particle that supplied materials mouth 1 can be fallen to both sides sub-material, in the spatial accommodation that agricultural crop straw particle is evenly distributed between two groups of roller groups.
Be arranged in the roller group of material-holding chamber 311 bottom, the diameter of roller 312 of respectively mating formation is 100mm ~ 300mm, and adjacent spacing of mating formation between roller 312 is 120mm ~ 360mm; All rollers 312 of mating formation all are connected with same driven unit, and drive rotating in same direction by driven unit, and adjacent roller thorn circle of mating formation on roller 312 is arranged in the mode of patho-occlusion, as shown in Figure 6 with shown in Fig. 7.Mating formation when roller 312 operates to make material fall, and when not operating, material then can not fall.
The parameters of above-mentioned each roller group is preferably: the length of roller thorn 313 is 30mm, and the spacing between same adjacent two rollers thorn circle of mating formation on roller 312 is 10mm; Be arranged in the roller group on material-holding chamber 311 top, the diameter of roller 312 of respectively mating formation is 320mm, and adjacent spacing of mating formation between roller 312 is 80mm; Be arranged in the roller group of material-holding chamber 311 bottom, the diameter of roller 312 of respectively mating formation is 200mm, and adjacent spacing of mating formation between roller 312 is 235mm.Each driving driven unit that roller 312 rotates of mating formation adopts drive motors 314 and chain-drive mechanism 315 to drive.
The course of work of agricultural crop straw flakeboard laying device of the present invention is as follows:
Material loading, as shown in Figure 1, backing plate 5 is transported to directly over brace table 2 by belt conveyor 81, first lift drive mechanism drives frame 4 of mating formation to drop to the position be affixed with backing plate 5, second lift drive mechanism 7 drives pressing plate 6 to rise to the top of guide rail 321, ground drive mechanism orders about spreading head 31 and moves to feeding station along guide rail 321, and spreading head 31 is just in time positioned at immediately below supplied materials mouth 1.Now, sized agricultural crop straw is fallen spreading head 31 from supplied materials mouth 1, and the inventory of amount needed for one block of slab of agricultural crop straw, completes material loading.
Conveying and discharging, as shown in Figure 2, ground drive mechanism orders about spreading head 31 and moves to precompressed station along guide rail 321, and spreading head 31 is positioned at directly over backing plate 5 and frame 4 of mating formation.In from feeding station to the process of precompressed station, be positioned at the roller group work on material-holding chamber 311 top, and the roller group being positioned at material-holding chamber 311 bottom does not work, and makes agricultural crop straw evenly be full of spreading head 31; After arriving precompressed station, the roller group being positioned at material-holding chamber 311 upper and lower works simultaneously, and the agricultural crop straw in spreading head 31 drops into mats formation in frame 4, forms certain thickness slab.
Precompressed, as shown in Figure 3, discharging completes rear walking wheel driving mechanism and orders about spreading head 31 immediately and move to feeding station along guide rail 321, spreading head 31 is immediately below supplied materials mouth 1 of newly arriving, second lift drive mechanism 7 drives pressing plate 6 to decline and implements precompressed to slab, and precompression is 1MPa, belt conveyor 81 and on backing plate 5 be depressed into and be closely affixed with the upper surface of brace table 2, under the acting in conjunction of pressing plate 6, brace table 2 and frame 4 of mating formation, the thickness of slab is reduced, complete flakeboard shaping; While precompressed, spreading head 31 synchronously carries out material loading at feeding station.
Flakeboard is sent, and as shown in Figure 4, after flakeboard is shaping, the second lift drive mechanism 7 drives pressing plate 6 to rise to the top of guide rail 321, and the first lift drive mechanism also drives frame 4 of mating formation to rise to the top of guide rail 321.Now, shaping flakeboard is carried, until next the block backing plate 5 on belt conveyor 81 arrives directly over brace table 2 along traffic direction by belt conveyor 81.
When next the block backing plate 5 on belt conveyor 81 arrives after directly over brace table 2, from the step of above-mentioned conveying and discharging, carry out mating formation of next block flakeboard.So repeatedly, thus realize mating formation continuously of flakeboard.
The above is only the preferred embodiment of the present invention, and protection scope of the present invention is also not only confined to above-described embodiment.For those skilled in the art, do not departing from the improvement that obtains under the technology of the present invention concept thereof and conversion also should be considered as protection scope of the present invention.
Claims (9)
1. an agricultural crop straw flakeboard laying device, it is characterized in that: comprise the supplied materials mouth (1) being positioned at feeding station, be positioned at the brace table (2) of station of mating formation and the feed mechanism (3) for material to be transported to station of mating formation from feeding station, the top of described brace table (2) is provided with the first lift drive mechanism be elevated for frame (4) of mating formation described in the shaping frame of mating formation (4) of flakeboard and driving, the second lift drive mechanism (7) that the top of described frame of mating formation (4) is provided with pressing plate (6) and drives described pressing plate (6) to be elevated, described laying device is also provided with the connecting gear (8) for being transported to by backing plate (5) on brace table (2), the driven in translation assembly (32) that described feed mechanism (3) comprises the spreading head (31) for putting material and is connected with spreading head (31), described spreading head (31) is provided with the material-holding chamber (311) of up/down perforation, the upper and lower of described material-holding chamber (311) is respectively equipped with one group of roller group, each group of roller group comprises and being arranged side by side and spaced multiple rollers of mating formation (312), described in roller (312) of mating formation be provided with roller thorn (313).
2. agricultural crop straw flakeboard laying device according to claim 1, is characterized in that: described connecting gear (8) comprises makes backing plate (5) support to elasticity conveying member on brace table (2) by pressing plate (6) downforce effect.
3. agricultural crop straw flakeboard laying device according to claim 2, it is characterized in that: described elasticity conveying member is belt conveyor (81), described belt conveyor (81) is located at directly over described brace table (2), and described belt conveyor (81) is connected with a belt drives assembly and by the conveying backing plate (5) of described belt drives Component driver discontinuous.
4. agricultural crop straw flakeboard laying device according to claim 1, is characterized in that: described first lift drive mechanism comprises two telescopic oil cylinders, the both sides of frame (4) of mating formation described in described two telescopic oil cylinders are connected to; Described second lift drive mechanism (7) is plunger cylinder.
5. agricultural crop straw flakeboard laying device according to claim 1, it is characterized in that: the roller group being arranged in material-holding chamber (311) top, described multiple roller of mating formation (312) is divided into two groups, and two groups of rollers of mating formation (312) are symmetrical arranged and are driven by independently driven unit respectively; Described two groups of rollers of mating formation (312) rotate backward.
6. agricultural crop straw flakeboard laying device according to claim 1, is characterized in that: the roller group being arranged in material-holding chamber (311) bottom, all rollers of mating formation (312) are all connected with same driven unit, and drives rotating in same direction by described driven unit.
7. agricultural crop straw flakeboard laying device according to claim 1, it is characterized in that: described driven in translation assembly (32) comprises guide rail (321), road wheel (322) and ground drive mechanism, one end of described guide rail (321) is positioned at the below of supplied materials mouth (1), the other end of described guide rail (321) is positioned at the top of brace table (2), described spreading head (31) is installed on described guide rail (321) by described road wheel (322), described ground drive mechanism is connected with road wheel (322) and drives spreading head (31) to move back and forth along guide rail (321).
8. agricultural crop straw flakeboard laying device according to claim 1, is characterized in that: described in roller (312) of mating formation establish multiple roller to sting circle in interval vertically, each roller thorn circle comprises many rollers thorn (313) arranged around roller of mating formation (312); Be arranged in the roller group of material-holding chamber (311) bottom, the roller thorn circle on adjacent roller of mating formation (312) is arranged in the mode of patho-occlusion.
9. agricultural crop straw flakeboard laying device according to claim 8, it is characterized in that: the roller group being arranged in material-holding chamber (311) top, the diameter of roller (312) of respectively mating formation is 160mm ~ 480mm, and the spacing between adjacent roller of mating formation (312) is 40mm ~ 120mm; Be arranged in the roller group of material-holding chamber (311) bottom, the diameter of roller (312) of respectively mating formation is 100mm ~ 300mm, and the spacing between adjacent roller of mating formation (312) is 120mm ~ 360mm; The length of described roller thorn (313) is 15mm ~ 45mm, and the spacing between adjacent two rollers thorn circle on same roller of mating formation (312) is 5 ~ 20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410203246.9A CN103950083B (en) | 2014-05-15 | 2014-05-15 | Agricultural crop straw flakeboard laying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410203246.9A CN103950083B (en) | 2014-05-15 | 2014-05-15 | Agricultural crop straw flakeboard laying device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103950083A CN103950083A (en) | 2014-07-30 |
| CN103950083B true CN103950083B (en) | 2016-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410203246.9A Expired - Fee Related CN103950083B (en) | 2014-05-15 | 2014-05-15 | Agricultural crop straw flakeboard laying device |
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| CN (1) | CN103950083B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106003354A (en) * | 2016-05-13 | 2016-10-12 | 安徽瑞丝环保能源有限公司 | Crop straw compressed panel system |
| CN110039624A (en) * | 2019-05-29 | 2019-07-23 | 机械科学研究总院海西（福建）分院有限公司 | A kind of laying device of sheet plate or bamboo wood |
| CN111941560A (en) * | 2020-08-20 | 2020-11-17 | 苏州伍得人造板设备有限公司 | Solid wood floor assembly device and process |
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| CN1827329A (en) * | 2005-12-22 | 2006-09-06 | 昆明人造板机器厂 | Technological method and device for wood particle-moulding tray |
| CN101104287A (en) * | 2007-07-20 | 2008-01-16 | 吉发 | Production method for manufacturing moulded chipboard and its special-purpose forming mould |
| CN201077104Y (en) * | 2007-07-17 | 2008-06-25 | 四川东华机械集团有限公司 | Wood-based panel blank pressed paving work section |
| CN101502976A (en) * | 2008-02-05 | 2009-08-12 | 重庆星星套装门有限责任公司 | Method for preparing bamboo wood shaving crushed aggregates molded sheet material with three-dimensional ridge design and equipment combination for realizing the method |
| CN201645593U (en) * | 2009-11-24 | 2010-11-24 | 四川省新岷江人造板机器有限责任公司 | Novel paving device for oriented strand board |
| CN102328337A (en) * | 2011-10-28 | 2012-01-25 | 无锡清大天工塑木材料有限公司 | Automatic paving machine |
| CN203945457U (en) * | 2014-05-15 | 2014-11-19 | 中南林业科技大学 | Agricultural crop straw flakeboard laying device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003311716A (en) * | 2002-04-25 | 2003-11-05 | Komatsu Ltd | Manufacturing method of molded article having carbonized material, and the molded article |
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2014
- 2014-05-15 CN CN201410203246.9A patent/CN103950083B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1827329A (en) * | 2005-12-22 | 2006-09-06 | 昆明人造板机器厂 | Technological method and device for wood particle-moulding tray |
| CN201077104Y (en) * | 2007-07-17 | 2008-06-25 | 四川东华机械集团有限公司 | Wood-based panel blank pressed paving work section |
| CN101104287A (en) * | 2007-07-20 | 2008-01-16 | 吉发 | Production method for manufacturing moulded chipboard and its special-purpose forming mould |
| CN101502976A (en) * | 2008-02-05 | 2009-08-12 | 重庆星星套装门有限责任公司 | Method for preparing bamboo wood shaving crushed aggregates molded sheet material with three-dimensional ridge design and equipment combination for realizing the method |
| CN201645593U (en) * | 2009-11-24 | 2010-11-24 | 四川省新岷江人造板机器有限责任公司 | Novel paving device for oriented strand board |
| CN102328337A (en) * | 2011-10-28 | 2012-01-25 | 无锡清大天工塑木材料有限公司 | Automatic paving machine |
| CN203945457U (en) * | 2014-05-15 | 2014-11-19 | 中南林业科技大学 | Agricultural crop straw flakeboard laying device |
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Effective date of registration: 20170602 Address after: 433300, No. 8, Huarong Road, Rong town, Jianli County, Jingzhou, Hubei Patentee after: Fu Jiang Group Co., Ltd Address before: 410000 Shaoshan South Road, Hunan, No. 498, No. Patentee before: Central South University of Forestry and Technology |
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Granted publication date: 20160330 Termination date: 20210515 |