CN209491890U - Prepare thermosetting composite polystyrene foam heat-insulating board particular manufacturing craft - Google Patents
Prepare thermosetting composite polystyrene foam heat-insulating board particular manufacturing craft Download PDFInfo
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- CN209491890U CN209491890U CN201821605985.0U CN201821605985U CN209491890U CN 209491890 U CN209491890 U CN 209491890U CN 201821605985 U CN201821605985 U CN 201821605985U CN 209491890 U CN209491890 U CN 209491890U
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Abstract
It is a kind of to prepare thermosetting composite polystyrene foam heat-insulating board particular manufacturing craft, it is characterized in that it includes bottom plate, and four pieces of cant boards being connect with bottom plate, the body structure of top opening made of bottom plate and cant board enclose and inner hollow, it further include top board, opening made of top board is enclosed along cant board is put into and is linked together by locating part and cant board.The thermosetting composite polystyrene foam heat-insulating board particular manufacturing craft prepared with the particular manufacturing craft, thermal coefficient reach 0.043W/ (mK), are 0.17MPa perpendicular to plate face tensile strength, density 140-150kg/m3, combustibility is A grades.
Description
Technical field
This programme is related to a kind of preparing thermosetting composite polystyrene foam heat-insulating board particular manufacturing craft.
Background technique
Building energy conservation is the important measure of " building a conservation-minded society, the Implement of sustainable development strategy ".China is an energy
The task of paramount importance that energy utilization rate is Chinese society development improves in the barrenr country in source, therefore reasonable energy utilization.And
In building trade, exterior-wall heat insulation is the important content of building enclosed structure isothermal holding.On August 1st, 2018, Ministry of Construction's publication
Implement " thermosetting composite polystyrene foam heat-insulating board " professional standard, it is specified that thermosetting composite polystyrene foam heat-insulating board it is each
Item requires.The publication of this standard is an important measure to construction market in the ban to A grades of thermal insulation materials.A grades of thermal insulation materials care for
Name Si Yi belongs to the fireproof and heat-insulating material that fire-protection rating is A grades.Thermosetting composite polystyrene foam heat-insulating board belongs to A2 grades of guarantors
Adiabator, and the key index for reaching A2 grades is gross calorific value: it MJ/kg), is detected by homogeneous preparations, actually by Organic Ingredients matter
Accounting is measured to determine.Traditional thermosetting composite polystyrene foam heat-insulating board is broadly divided into two class of stirred type and osmosis type.Therefore, it researches and develops
A kind of thermosetting composite polystyrene foam heat-insulating board and preparation process and specific purpose tool with excellent effect is to building energy conservation
Develop important in inhibiting.
Utility model content
Being designed to provide for this programme a kind of prepares thermosetting composite polystyrene foam heat-insulating board particular manufacturing craft.
A kind of to prepare thermosetting composite polystyrene foam heat-insulating board particular manufacturing craft, it includes bottom plate, and connect with bottom plate
Four pieces of cant boards, the body structure of top opening made of bottom plate and cant board enclose and inner hollow, further includes top board,
Opening made of top board is enclosed along cant board is put into and is linked together by locating part and cant board.
The specific feature of this programme is in addition, four pieces of cant boards are respectively front side vertical plate, rear side vertical plate, left side vertical plate and right side
Plate face is made by 3mm thickness galvanized steel plain sheet in vertical plate, bottom plate, four pieces of cant boards and top board, bottom plate it is long × wide having a size of
1300mm × 1220mm, left and right side vertical plate is long × wide having a size of 1300mm × 1000mm, forward and backward cant board it is long × wide having a size of
1220mm × 1000mm, top board is long × wide having a size of 1215mm × 1215mm, and plate face outer surface is provided with reinforcement rib reinforcement, adds
Strong rib is the thick galvanized steel plain sheet of 50mm wide, 10mm.
Bottom plate is connected by a hinge with four pieces of cant boards, and hinge is irony, and zinc-plated processing is done on surface.Every piece of cant board lower part
3 hinges are set between bottom plate, and it is 500mm, the hinge of two sides that setting position, which is hinge spacing adjacent on each cant board,
Apart from cant board edge 50mm.
Several metal lock catchs are set on the stile of cant board.3 sets of metal lock catchs are provided on every piece of cant board unilateral side stile.
Metal lock catch includes that coiled hair straight pin and pin hole seat composition, pin hole seat are fixed by welding in the stile of cant board
On, pin hole is provided in pin hole seat, the pin hole in the pin hole seat on adjacent cant board is corresponding to be arranged, coiled hair straight pin and pin hole mistake
It is full of cooperation, adjacent cant board is fixed together by coiled hair straight pin insertion pin hole.
The locating part is the stop bit lock being arranged on cant board, and stop bit lock includes lock, and spring is provided in lock
And lock tongue, lock tongue stretch out cant board inner surface under the action of the spring, every piece of cant board is arranged 4 stop bits and locks, and every piece is edge-on
Adjacent stop bit locks spacing 200mm on plate, and stop bit lock in edge is not less than 200mm, stop bit lock setting height apart from cant board edge
At 600~670mm of cant board bottom margin.When top board passes through stop bit lock from top to bottom, lock tongue is pushed back, when on top board
When surface marches to stop bit lock lower section, lock tongue pops up under the action of the spring, and the periphery of the upper surface of top board has 12 stop bits
The lock tongue of lock, top board realizes vertical limit under the collective effect that slurry screen resilience and stop bit are locked, while cant board is for upper
Pressing plate realizes circumferential limit.It is required according in standard JG/T 536-2017 " thermosetting polystyrene foam insulation board ", insulation board is close
Degree should be controlled in 140~200kg/m3.Slurry according to raw material ratio and step of preparation process (1)~(5), after filling up mold
Quality is by being weighed as 125~140kg, on the basis of being 140kgm3 by density, calculate after slurry reduction fixing fabric structure 0.89~
1m3 can be met the requirements.Mould inside is long × wide having a size of 1220mm × 1220mm, by size calculate slurry by second
Height should be controlled in 600~670mm after second compression.
Compared with prior art, the beneficial effect of this programme is: 1, the thermosetting composite polystyrene foam of this programme preparation
Insulation board, density are 140~150/m3,0.043 W/ of thermal coefficient (mK), are 0.17MPa perpendicular to plate face tensile strength,
Burning behavior class is A2 grades, and performance is better than most of thermal insulation material on the market.
2, preparation method simple possible, equipment, human input are few, and with short production cycle, are conducive to industrial application.
3, slurry in mold is pushed by using press machine in insulation board preparation process twice, can be accurately controlled
Insulation board density improves insulation board mechanical property, so that insulation board is more closely knit, improves pine inside traditional stirred type insulation board
It dissipates, the disadvantage that gap is big, water absorption is big；
4, it is avoided using new exclusive mold so that various raw material injected volumes are more accurate in insulation board preparation process
Waste of raw materials, it is ensured that insulation board properties after molding are more stable；Top board and stop bit lock are arranged in mold to be kept away
Exempt to occur shrinking rebound when insulation board conserves in a mold.
Detailed description of the invention
Fig. 1 is thermosetting composite polystyrene foam heat-insulating board organigram.Fig. 2 is that inorganic coagulation material package graphite is poly-
Styrenic foams grain structure schematic diagram.Fig. 3 is Special mould structure schematic diagram.Fig. 4 is the A-A view of Fig. 3.Fig. 5 is upper pressure
Plate structural schematic diagram.Fig. 6 is the bottom view of Fig. 5.Fig. 7 is metal lock catch structural schematic diagram.Fig. 8 is stop bit lock construction schematic diagram.
In figure: 1- graphite polystyrene foam particles；2- inorganic coagulation material；3- top board；Vertical plate on front side of 4-；On the left of 5-
Vertical plate；6- right side vertical plate；Vertical plate on rear side of 7-；8- stop bit lock；9- hinge；10- metal lock catch；11- lock tongue；12- spring；13- disk
Head straight pin；14- pin hole seat；15- ribs；16- bottom plate；17- hanging ring；18- lock.
Specific embodiment
Embodiment 1: a kind of thermosetting composite polystyrene foam heat-insulating board, its raw material include in parts by weight such as the following group
Point: graphite granules of polystyrene: 80 parts, low-heat portland cement: 650 parts, hydroxypropyl methyl cellulose: 6 parts, polysiloxane powder
Last hydrophober: 6 parts, polyacrylamide thickeners: 2 parts, alumina silicate fibre: 6 parts, vinyl acetate-ethylene copolymerization emulsions: 250
Part.As shown in Figs. 1-2, graphite granules of polystyrene is that the auxiliary agents such as graphite, foaming agent are added in polystyrene raw material, passes through stone
Ink is wrapped in steep that wall inner wall and forms fireprotection layer, and the particle of diameter about 2~3mm is made up of prefoaming machine.Low-heat portland cement is strong
Spending grade is 42.5, is that proper amount of gypsum is added with the Portland clinker of proper composition, through levigate manufactured with low aquation
The hydraulic cementing materials of heat has good workability, low hydration heat, high later strength, high-durability, high erosion resisting etc.
Feature.Vinyl acetate-ethylene copolymerization emulsions solid content 50% possesses good caking property, flexibility, resistance to acid and alkali, as water
Mud modifying agent also has good water resistance and weatherability.
The preparation process of thermosetting composite polystyrene foam heat-insulating board includes the following steps:
(1) particle and flour weigh spare: 80 parts of graphite granules of polystyrene；650 parts of low-heat portland cement；Hydroxyl
6 parts of propyl methocel；4 parts of polysiloxanes powder hydrophober；2 parts of polyacrylamide thickeners；6 parts of alumina silicate fibre；Vinegar
250 parts of sour ethylene-vinyl copolymer emulsion；
(2) the sequencing that material, is added is: first taking low-heat portland cement, hydroxypropyl methyl cellulose, polysiloxanes
Five kinds of powders are put into respectively and stir 3min in blender together by powder hydrophober, polyacrylamide thickeners, alumina silicate fibre
~5min；Then graphite granules of polystyrene is added, while vinyl acetate-ethylene copolymerization emulsions are added, stirring 3min~
5min is prepared into slurry；
(3), the slurry prepared is delivered in particular manufacturing craft by blender, conveying capacity is controlled in 0.9~1m3；
Particular manufacturing craft includes the body structure of top opening and inner hollow made of being enclosed as bottom plate and cant board；
(4), particular manufacturing craft is pushed to below press machine, the slurry in particular manufacturing craft is carried out by the platen on press machine
Compression processing stops pushing, then stands 10 seconds at this pressure, pressure when pressure reaches 0.10MPa when press machine pushes
Machine resets；
(5), Xiang Shengyou adds slurry in the particular manufacturing craft of slurry until particular manufacturing craft is filled up again after compression；
(6), top board 3 is placed at the top of particular manufacturing craft, the gap control between 3 edge of top board and cant board inner wall
System is in 2~4mm；
(7), pushed by top board 3 of the press machine to particular manufacturing craft, until top board 3 is pressed to cant board inner wall
On stop bit lock 8 at, the lock tongue 11 of stop bit lock 8 protrudes horizontally up the top of top board 3, by top board 3 and the vertical limit of cant board
Stop afterwards, press machine resets；
(8) particular manufacturing craft, is pushed to fog room to conserve under field conditions (factors), curing time is 3 days.
(9) particular manufacturing craft, is removed, thermosetting composite polystyrene foam heat-insulating board is obtained after cutting.
Thermosetting composite polystyrene foam heat-insulating board particular manufacturing craft is prepared, it includes bottom plate 16, and connect with bottom plate 16
Four pieces of cant boards, the body structure of top opening made of bottom plate 16 and cant board enclose and inner hollow, further includes upper pressure
Plate 3, opening made of top board 3 is enclosed along cant board are put into and are linked together by locating part and cant board.
Four pieces of cant boards respectively front side vertical plate 4, rear side vertical plate 7, left side vertical plate 5 and right side vertical plate 6,16, four pieces of bottom plate
Plate face is made by 3mm thickness galvanized steel plain sheet in cant board and top board 3, and bottom plate 16 is long × wide having a size of 1300mm × 1220mm,
Left and right side vertical plate is long × wide having a size of 1300mm × 1000mm, and forward and backward cant board is long × wide having a size of 1220mm × 1000mm,
Top board 3 is long × wide having a size of 1215mm × 1215mm, and cant board plate face outer surface is provided with the reinforcing of ribs 15, ribs 15
For the thick galvanized steel plain sheet of 50mm wide, 10mm.
Bottom plate 16 is connect with four pieces of cant boards by hinge 9, and hinge 9 is irony, and zinc-plated processing is done on surface.Every piece of cant board
Three hinges 9 are set between lower part and bottom plate 16, it is 500mm that setting position, which is 9 spacing of hinge adjacent on each cant board, two
The hinge 9 of side is apart from cant board edge 50mm.
Several metal lock catchs 10 are set on the stile of cant board.Three sets of metal latch are provided on every piece of cant board unilateral side stile
Button 10.
Metal lock catch 10 includes that coiled hair straight pin 13 and pin hole seat 14 form, and pin hole seat 14 is fixed by welding in cant board
Stile on, pin hole is provided in pin hole seat 14, the corresponding arrangement of pin hole in the pin hole seat 14 on adjacent cant board, coiled hair cylinder
Pin 13 and pin hole are interference fitted, and coiled hair straight pin 13 is inserted into pin hole and is fixed together adjacent cant board.
The locating part is the stop bit lock 8 being arranged on cant board, and stop bit lock 8 includes lock 18, is arranged in lock 18
There are spring 12 and lock tongue 11, lock tongue 11 stretches out cant board inner surface under the action of spring 12, and the lock tongue 11 of stop bit lock 8 is horizontal
Reach the top of top board 3, every piece of cant board is arranged 4 stop bits and locks 8, setting height at away from cant board bottom margin 620mm,
Adjacent stop bit locks 8 spacing 200mm on every piece of cant board, and edge stop bit lock 8 is not less than 200mm apart from cant board edge.
Thermosetting polystyrene foam insulation board is completed in preparation, and according to JG/T 536-2017, " thermosetting polystyrene foam is kept the temperature
Plate " test method in standard carries out properties of product detection.
Formed heat-insulating board test data: density: 146kg/m3, thermal coefficient: 0.045 W/ (mK), tensile strength:
0.15MPa, combustibility: A2 grades.Experimental result: insulation board density, combustibility meet " thermosetting composite polystyrene foam guarantor
Warm plate " Industry code requirements, thermal coefficient, tensile strength are higher than standard performance criteria.
Embodiment 2: the present embodiment place same as Example 1 repeats no more, the difference is that, graphite polystyrene
Grain: 70 parts, low-heat portland cement: 700 parts, hydroxypropyl methyl cellulose: 6 parts, polysiloxanes powder hydrophober: 6 parts, poly- third
Acrylamide thickener: 2 parts, alumina silicate fibre: 6 parts, vinyl acetate-ethylene copolymerization emulsions: 300 parts.According to heat in embodiment 1
Gu the preparation process of composite polystyrene foam heat-insulating board carries out insulation board processing.Formed heat-insulating board test data: close
Degree: 154kg/m3, thermal coefficient: 0.049 W/ (mK), tensile strength: 0.17MPa, combustibility: A2 grades.Experimental result:
Insulation board density, thermal coefficient, combustibility meet " thermosetting composite polystyrene foam heat-insulating board " Industry code requirements, tension
Intensity is higher than standard performance criteria.
Embodiment 3: the present embodiment place same as Example 1 repeats no more, the difference is that, graphite polystyrene
Grain: 90 parts, low-heat portland cement: 600 parts, polysiloxanes powder hydrophober: 6 parts, vinyl acetate-ethylene copolymerization emulsions:
200 parts.According to the preparation process of thermosetting composite polystyrene foam heat-insulating board in embodiment 1, insulation board processing is carried out.At
The test data of type thermosetting composite polystyrene foam heat-insulating board: density: 133kg/m3, thermal coefficient: 0.043 W/ (mK),
Tensile strength: 0.11 MPa, combustibility: A2 grades.Experimental result: insulation board density, thermal coefficient, combustibility meet " heat
Gu composite polystyrene foam heat-insulating board " Industry code requirements, tensile strength is higher than standard performance criteria.
Embodiment 4: the present embodiment place same as Example 1 repeats no more, the difference is that, graphite polystyrene
Grain: 80 parts, low-heat portland cement: 800 parts, hydroxypropyl methyl cellulose: 6 parts, polysiloxanes powder hydrophober: 6 parts, poly- third
Acrylamide thickener: 2 parts, alumina silicate fibre: 6 parts, vinyl acetate-ethylene copolymerization emulsions: 400 parts.
According to the preparation process of thermosetting composite polystyrene foam heat-insulating board in embodiment 1, insulation board processing is carried out.
Formed heat-insulating board test data: density: 168kg/m3, thermal coefficient: 0.062W/ (mK), tensile strength: 0.18 MPa, combustion
Burning performance: A2 grades.Experimental result:
Insulation board thermal coefficient does not meet " thermosetting composite polystyrene foam heat-insulating board " Industry code requirements.
Analysis of experimental results: the comparison discovery of 1,2,3 experimental result of embodiment, 1 chinese raw materials of embodiment, which is matched, when prepares work
Skill is optimal case, and as inorganic coagulation material quality accounting increases, insulation board density, thermal coefficient, tensile strength increase.
Embodiment 5:(comparative example) a kind of preparation process of thermosetting composite polystyrene foam heat-insulating board, according to embodiment 1
Chinese raw materials component follows the steps below processing:
(1) raw material preparation stirring and assembly mold are carried out according to preparation process in embodiment 1, but stop bit is no longer arranged in mold
Lock 10；
(2) mold is pushed to below blender, the slurry prepared is delivered in mold by blender, conveying capacity control
System is in 0.9~1m3；
(3) mold is pushed to below press machine, compression processing is carried out to slurry in mold by the platen on press machine, when
Stop pushing when pressure reaches 0.10MPa when press machine pushes, then stand 10 seconds at this pressure, press machine resets；
(4) slurry after compression pushes to mold below blender, then the slurry prepared is delivered to by blender
In mold, until will be filled up in mold；
(5) mold is pushed to below press machine, die top no longer places top board 3, by the platen pair on press machine
Slurry carries out compression processing in mold, stops pushing when press machine pushes, pressure reaches 0.10MPa, then at this pressure
10 seconds are stood, press machine resets；
(6) mold is pushed to fog room to conserve under field conditions (factors), curing time is 3 days.
(7) insulation board demoulding, cutting.
Formed heat-insulating board test data: density: 108kg/m3, thermal coefficient: 0.053 W/ (mK), tensile strength:
0.07 MPa.Experimental result: insulation board density, thermal coefficient, tensile strength do not meet " thermosetting composite polystyrene foam guarantor
Warm plate " Industry code requirements.Analysis of experimental results: stress is sprung back in insulation board maintenance processes, causes insulation board internal structure loose
It dissipates, rigid is low；Insulation board internal voids are larger, cause insulation board density relatively low；Insulating plate structure is loose, rigid
It is low, cause insulation board intensity low, tensile strength is small；Due to the above problem, it will lead to the increase of insulation board water absorption, it is hidden to there is safety
Suffer from.
Embodiment 6: the present embodiment place same as Example 1 repeats no more, the difference is that stop bit when assembly mold
Lock 8 setting height for for away from cant board bottom margin 600mm locate, foundation embodiment 1 in thermosetting composite polystyrene foam thermal insulation
The preparation process of plate carries out insulation board processing.Formed heat-insulating board test data: density: 155kg/m3, thermal coefficient:
0.049 W/ (mK), tensile strength: 0.16MPa, combustibility: A2 grades.Experimental result: protect insulation board density, thermal coefficient,
Tensile strength, combustibility meet " thermosetting composite polystyrene foam heat-insulating board " Industry code requirements.
Embodiment 7: the present embodiment place same as Example 1 repeats no more, the difference is that stop bit when assembly mold
Lock 8 setting height for for away from cant board bottom margin 650mm locate, foundation embodiment 1 in thermosetting composite polystyrene foam thermal insulation
The preparation process of plate carries out insulation board processing.Formed heat-insulating board test data: density: 134kg/m3, thermal coefficient:
0.046 W/ (mK), tensile strength: 0.13MPa, combustibility: A2 grades.Experimental result: insulation board density, resists thermal coefficient
Tensile strength, combustibility meet " thermosetting composite polystyrene foam heat-insulating board " Industry code requirements.
Embodiment 8: the present embodiment place same as Example 1 repeats no more, the difference is that stop bit when assembly mold
Lock 8 setting height for for away from cant board bottom margin 670mm locate, foundation embodiment 1 in thermosetting composite polystyrene foam thermal insulation
The preparation process of plate carries out insulation board processing.Formed heat-insulating board test data: density: 129kg/m3, thermal coefficient:
0.045 W/ (mK), tensile strength: 0.11MPa, combustibility: A2 grades.Experimental result: insulation board density, resists thermal coefficient
Tensile strength, combustibility meet " thermosetting composite polystyrene foam heat-insulating board " Industry code requirements.
Embodiment 9: the present embodiment place same as Example 1 repeats no more, the difference is that stop bit when assembly mold
Lock 8 setting height for for away from cant board bottom margin 720mm locate, foundation embodiment 1 in thermosetting composite polystyrene foam thermal insulation
The preparation process of plate carries out insulation board processing.Formed heat-insulating board test data: density: 122kg/m3, thermal coefficient:
0.046 W/ (mK), tensile strength: 0.09MPa, combustibility: A2 grades.Experimental result: insulation board thermal coefficient, flammability
" thermosetting composite polystyrene foam heat-insulating board " Industry code requirements can be met, density, tensile strength are undesirable.
Embodiment 10: the present embodiment place same as Example 1 repeats no more, the difference is that stop bit when assembly mold
Lock 8 setting height for for away from cant board bottom margin 550mm locate, foundation embodiment 1 in thermosetting composite polystyrene foam thermal insulation
The preparation process of plate carries out insulation board processing.Formed heat-insulating board test data: density: 161kg/m3, thermal coefficient:
0.052W/ (mK), tensile strength: 0.17MPa, combustibility: A2 grades.Experimental result: insulation board density, tensile strength, combustion
It burns performance and meets " thermosetting composite polystyrene foam heat-insulating board " Industry code requirements, thermal coefficient is undesirable.
Analysis of experimental results: by comparative example 1,6,7,8,9,10, stop bit lock setting height is bigger, and insulation board is close
Degree, tensile strength are lower, and wherein stop bit lock setting height is optimal case in embodiment 1.
Claims (6)
1. a kind of prepare thermosetting composite polystyrene foam heat-insulating board particular manufacturing craft, it is characterized in that it includes bottom plate, and with bottom
Four pieces of cant boards of plate connection, the body structure of top opening made of bottom plate and cant board enclose and inner hollow further include
Top board, opening made of top board is enclosed along cant board are put into and are linked together by locating part and cant board.
2. preparation thermosetting composite polystyrene foam heat-insulating board particular manufacturing craft according to claim 1, it is characterized in that four pieces
Cant board is respectively that front side vertical plate, rear side vertical plate, left side vertical plate and right side vertical plate, bottom plate, four pieces of cant boards and top board are equal
Plate face is made by 3mm thickness galvanized steel plain sheet, bottom plate is connected by a hinge with four pieces of cant boards, and plate face outer surface is provided with ribs and adds
Gu.
3. preparation thermosetting composite polystyrene foam heat-insulating board particular manufacturing craft according to claim 1, it is characterized in that every piece
3 hinges are set between cant board lower part and bottom plate.
4. preparation thermosetting composite polystyrene foam heat-insulating board particular manufacturing craft according to claim 1, it is characterized in that edge-on
Several metal lock catchs are set on the stile of plate.
5. preparation thermosetting composite polystyrene foam heat-insulating board particular manufacturing craft according to claim 4, it is characterized in that metal
Lock includes that coiled hair straight pin and pin hole seat form, and pin hole seat is fixed by welding on the stile of cant board, sets in pin hole seat
It is equipped with pin hole, the corresponding arrangement of the pin hole in the pin hole seat on adjacent cant board, coiled hair straight pin and pin hole are interference fitted, by coiled hair
Adjacent cant board is fixed together by straight pin insertion pin hole.
6. preparation thermosetting composite polystyrene foam heat-insulating board particular manufacturing craft according to claim 1, it is characterized in that described
Locating part is the stop bit lock being arranged on cant board, and stop bit lock includes lock, spring and lock tongue is provided in lock, lock tongue exists
Cant board inner surface is stretched out under the action of spring, every piece of cant board is arranged 4 stop bits and locks.
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| Application Number | Priority Date | Filing Date | Title |
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Effective date of registration: 20200814 Address after: 250031 Shandong Province Flyover District of Ji'nan City Road 29. Co-patentee after: Shandong Jianke Special Construction Engineering Technology Center Co.,Ltd. Patentee after: Shandong Academy of Building Science Co.,Ltd. Address before: 250031 Shandong Province Flyover District of Ji'nan City Road 29. Patentee before: SHANDONG PROVINCIAL ACADEMY OF BUILDING RESEARCH |
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