CN204773666U - Utilize production facility of inorganic converted materials's of vacuum adsorption vibration manipulation infiltration polyphenyl board - Google Patents
Utilize production facility of inorganic converted materials's of vacuum adsorption vibration manipulation infiltration polyphenyl board Download PDFInfo
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- CN204773666U CN204773666U CN201520340091.3U CN201520340091U CN204773666U CN 204773666 U CN204773666 U CN 204773666U CN 201520340091 U CN201520340091 U CN 201520340091U CN 204773666 U CN204773666 U CN 204773666U
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- styrofoam
- slip
- infiltration
- gas
- crawler belt
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Abstract
The utility model discloses an utilize production facility of inorganic converted materials's of vacuum adsorption vibration manipulation infiltration polyphenyl board. The material part is mixed including prepareeing material to this equipment, and the part is adsorbed in the infiltration, the vacuum pump unit, and stoving ventilation unit and reflux unit are constituteed. Through taking out during the material pumping over sends flourishing material container to, transporting to the infiltration workspace at lower polyphenyl board of actuating system work, falling the ground paste to on the infiltration board, even stream to the polyphenyl board that removes on the surface, the lower surface of polyphenyl board is with the track laminating that has the rectangle clearance, with the upper surface laminating that mixes the gas -liquid ware below the track, mixes the gas -liquid ware and passes through the breathing pipe and with vacuum pump connection, install the oscillating -column pump simultaneously on the layer board of hanging up, under negative pressure and oscillating -column pump vibratory action are breathed in to the vacuum pump, evenly permeates the granule clearance of polyphenyl intralamellar part to the ground paste above the polyphenyl board, during the collection container is wandered to one unnecessary ground paste, flows back to stirred vessel through the reflux unit. The polyphenyl board that has permeated modified ground paste is under drive arrangement's transmission, and it dries to stoving ventilation unit to advance accomplishes. Utilize this equipment swiftly the efficient permeate different converted materials between the granule gap of polyphenyl board, improved the defect of former polyphenyl board performance greatly, bigger safety problem has been solved to the performance such as more can prevent fires simultaneously that it keeps warm to play, the range of application is more extensive and practical.
Description
Technical field
The utility model belongs to a kind of styrofoam production technology and manufactures field, be specifically related to a kind of vacuum suction method for oscillating that utilizes and inorganic modified infiltration is entered the production equipment of the intergranular automation continous way of styrofoam, make up the defect of original styrofoam, improve the performance such as fire prevention or intensity of original styrofoam.
Background technology
Styrofoam full name polystyrene foam plate, has another name called cystosepiment or EPS plate.By the expandable polystyrene bead containing volatile fluid foaming agent, the white solid sheet material with fine hole-closing structure of hot briquetting in a mold after heating pre-sending out.Between adjacent grain pearl, leave microgap, have plenty of to be connected to each other between these microgaps and come round with outer surface, the performance like this for improving styrofoam provides possibility, and styrofoam has lightweight, and insulation, the low feature of thermal conductivity factor, is widely used in building heat preservation field.
Although styrofoam has lightweight, the advantage of insulation, has obvious shortcoming to be exactly not resistance to burning, along with country strengthens the requirement of fire safety, greatly limit the application of styrofoam.Based on the shortcoming of styrofoam, have in the market and severally on styrofoam basis, add flame retardant materials, improve its fire protecting performance, meet market fire protection requirement.One is: after styrofoam particle and fire retardant slip mix and blend, pour the mode that mold cured is shaping into, this mode can't realize production line balance, and production efficiency is low, they are two years old, what have is put into styrofoam in the permeability vessel of an opposing seal, fire retardant is sprayed onto on the surface of styrofoam, in the space of opposing seal, below styrofoam, there is getter device, under the air-breathing of vavuum pump, fire retardant is drawn onto in the particulate interspaces of styrofoam, and then take out from permeable work container, be put into next operation, this method can not realize streamline, simultaneously skewness in fire retardant gap between particles, they are three years old, although what have achieves pipeline system, when styrofoam passes to the permeable work region of streamline by drive system, fire retardant is sprayed at the upper surface of styrofoam, the lower surface of styrofoam has vacuum absorption device, but this at present also have imperfection local, the intergranular fire retardant skewness of such as styrofoam, be exactly that a large amount of the flowing to of fire retardant causes wasting phenomenon on the ground in addition, be exactly fire retardant proportioning inaccuracy in addition, major part does not adopt more accurate metrical instrument in slip proportioning, cause the unstable properties of fire retardant, only adopt the fire retardant of fire protecting performance in the market simultaneously, also requirement is can not meet at aspect of performances such as intensity.
Summary of the invention
In order to overcome the deficiency existing for above-mentioned prior art, the utility model provide a kind of utilize vacuum suction mode of vibration fire prevention or strengthen other performance inorganic modified homogenize material the gap penetrating between styrofoam internal particle in automatic assembly line production equipment.Both there is insulated fire effect, improved other mechanical property simultaneously, realized again the mass-produced demand of scale.
The production equipment utilizing vacuum suction method for oscillating to permeate the styrofoam of inorganic modified material provided by the utility model, is characterized in that: it comprises spice part of getting the raw materials ready, infiltration absorbed portion, air-breathing separator, transmission delivery system, dries the composition such as ventilation unit and reflux.
Described material blending device of getting the raw materials ready comprises by multiple weighing bucket, each weighing bucket is placed on the shelf that welded, this shelf welds different structures according to the quantity of weighing bucket, can make full use of the space in place like this, and place is reasonably utilized, simultaneously, the shelf being placed with weighing bucket is equipped with measurement mechanism, the material modified of different performance can be configured accurately by measurement mechanism, more accurately reach recipe requirements, make the modification stable performance often criticizing goods, the requirement of ensuring the quality of products.
After each described weighing bucket material modified is ready to, by filler program, according to product properties requirement, interval is poured in stirred vessel successively, feeds in raw material while stir, stirs in time requirement.
After described modification slip is stirred in stirred vessel, be transported in charge cask by the mateiral pump in conveying system and conveying pipeline, the folding lid of batch turning is arranged at the bottom of charge cask, folding lid connects with charge cask Spindle Links, when axle promotes the rotatable handle of axle head under pneumatic linear actuator work, folding lid realizes the action of opening (or conjunction), pneumatic linear actuator adopts chain connection by bearing pin with charge cask, pneumatic linear actuator can rotate with bearing pin, pneumatic linear actuator realizes controlling by electrical control gear, reach pneumatic linear actuator motion bar to stretch, realize the opening and closing movement of folding lid.
Described, when on the infiltration plate below slip is poured into from charge cask, infiltration plate is uniformly distributed the hole of multiple diameter 5 to 8 millimeters, slip flows to styrofoam below on the surface uniformly by the aperture above infiltration plate, left and right sides hinge two axles of infiltration plate, the length of axle is identical with the width of infiltration plate, when slip flows to styrofoam surperficial, the axle at infiltration plate two ends is with styrofoam contact, the two sides of styrofoam are with baffle plate contact, naturally form the rectangle capaciting material groove that is held slip like this, the axle of infiltration plate both sides is both along with the upper surface original place of styrofoam is rotated, play again the effect stopping slip simultaneously.
Contact with the upper surface of crawler belt below described styrofoam, crawler belt is that self-assembling formation rectangular apertures between drum crawler belt batten so between two, slip down can be trickled by space by the chain of the crawler belt batten of multiple drum with crawler belt both sides.
Contact with roller and gas-liquid mixed aspirator below described crawler belt, and under the suitable pressure of infiltration plate two side shaft, the lower surface of styrofoam and crawler belt, comparatively close contact between crawler belt and gas-liquid mixed aspirator, to reach good adsorption effect.
There are two blocks of supporting plates to weld together with the width of fixed mount below described crawler belt, two supporting plates are provided with vibration pump.
Described, when slip be poured on styrofoam above time, vibration pump vibrations and gas-liquid mixed aspirator under the acting in conjunction of vavuum pump intake negative-pressure, modification slip uniformly penetrating to styrofoam particle gap between, the styrofoam particle slip that is modified wraps up uniformly.
Described modification slip is under the style of work of vibration pump and gas-liquid mixed aspirator, and unnecessary bin is wandered in feeder below, from the accumulator tank below feeder flows to again.
The described slip flow down is withdrawn in stirred vessel by reflux, realizes recycling, does not waste cost-saving.
Described gas-liquid mixed aspirator is divided into upper and lower two parts, top is divided into a rectangle long recess, several comparatively macropore is uniformly had below groove, bottom is divided into the cross section of cavity to be the conical collector of rectangle, be connected with air intake duct below collector, in the groove that such air and slip are inhaled into gas-liquid mixed aspirator and collector, be withdrawn in gas-liquid separation device eventually through air intake duct.
Described, when gas and slip are drawn onto after in gas-liquid separation device, by separator, gas is separated with slip, unnecessary slip is again withdrawn in stirred vessel by reflux again and reuses.
Described, the styrofoam of having permeated slip, by the wiper of drive unit through twice soft scraper plate, is flowed to unnecessary slip wiper in collection container, then transports in oven dry ventilation unit, dries ventilation unit and intergranular for styrofoam modification slip is solidified.
Described inorganic modified material is made up of the material of different performance, comprises applied fireproofing, strengthens strength materials, improves toughness material, improves between inorganic and organic material and wrap up power performance materials etc.
The styrofoam of the complete slip of described infiltration, after drying and ventilating, neatly puts styrofoam on the shelf of airing.
Accompanying drawing explanation
Fig. 1 is general illustration of the present utility model
Fig. 2 permeates plate schematic diagram
Fig. 3 gets the raw materials ready mixing system schematic diagram
Fig. 4 gas-liquid mixed aspirator schematic diagram
Fig. 5 collector schematic diagram
Fig. 6 convergence tube schematic diagram
Fig. 7 crawler belt schematic diagram
Fig. 8 charge cask schematic diagram
The soft scraper plate schematic diagram of Fig. 9
A gets the raw materials ready conveying part; B vavuum pump unit; C dries ventilation unit; D permeates absorbed portion; E transmission delivery system; F reflux
1 weighing bucket 2 stirred vessel 3 conveying pipeline 4 charge cask 5 permeates plate 6 and permeates plate roll shaft 7 soft scraper plate 7-1 fastening bolt 7-2 binding 8 baffle plate 9 roller 10 styrofoam 11 drive sprocket 12 gas-liquid mixed aspirator 12-1 through hole 12-2 and converge the hole driven Athey wheel 18 convergence tube 18-1 air-breathing of 12-a aspirator upper part groove 12-b aspirator lower part feeder 13 air intake duct 14 vibration pump 15 collector 16 steady job frame 17 and be in charge of 19 stirring motor 20 recovery pump 21 weighing shelf 22 mateiral pump 23 measurement mechanism 24 crawler belt 24-1 crawler belt batten 24-2 crawler belt clearance groove 26 pneumatic linear actuator 27 folding lid 28 axles.
Detailed description of the invention
Be described further below in conjunction with the drawings and specific embodiments, to help understanding content of the present utility model.
As shown in Figure 1, be general structure schematic diagram of the present utility model, this figure is rough schematic view, illustrates basic structure of the present utility model.The utility model provides a kind of negative pressure vibrating method that utilizes the material modified production equipment penetrating into styrofoam internal particle gap.Comprise the spice conveying system a with metering device, infiltration adsorption system d, transmission delivery system e, vavuum pump unit b, dry blowing device c and reflux f and form.
Spice conveying system of the present utility model includes multiple charging basket 1, charging basket 1 is put on moveable welding shelf 21, the shelf 21 of welding is equipped with different metering devices 23, comparatively accurate quantification batching can be carried out by weighing or measuring volume mode, prepared modification slip is made to reach the ratio requirement of performance, make all stable performances of often a collection of goods, meet quality requirement.
In spice conveying system, when material preparation is joined by the institute of each charging basket 1, pour in stirred vessel 2 according to sequencing successively interval, the rotation of whisk handle is driven by motor 19, stir, be transported in charge cask 4 by mateiral pump 22 and conveying pipeline 3, the folding lid 27 of batch turning is arranged at the bottom of charge cask 4, folding lid 27 connects with charge cask 4 axle 28 link, when the rotatable handle of axle 28 impeller-hub 28 end under pneumatic linear actuator 26 works, folding lid 27 realizes the action of opening (or conjunction), pneumatic linear actuator 26 adopts chain connection by bearing pin with charge cask 4, pneumatic linear actuator 26 can rotate with bearing pin, pneumatic linear actuator 26 realizes controlling by electrical control gear, the motion bar reaching pneumatic linear actuator 27 stretches, the folding realizing folding lid 27 completes batch turning action.
When on the infiltration plate 5 below slip is poured into from charge cask 4, infiltration plate is uniformly distributed the through hole of multiple diameter 5 to 8 millimeters, slip flows to styrofoam below on the surface uniformly by the aperture above infiltration plate 5, left and right sides hinge two axles 6 of infiltration plate 5, the length of axle 6 is identical with the width of infiltration plate 5, when slip flows to styrofoam surperficial, the axle 6 at infiltration plate 5 two ends is with styrofoam contact, the two sides of styrofoam are with baffle plate 8 interior side contacts, naturally form the rectangle capaciting material groove that is held slip like this, the axle 6 of infiltration plate 5 both sides is both along with rolling in the upper surface original place of styrofoam, play again the effect stopping slip simultaneously.
Contact with the upper surface of crawler belt 24 below styrofoam, crawler belt 24 is that self-assembling formation rectangular apertures between drum batten 24-1 so between two, slip down can be trickled by space by the chain of the batten 24-1 of multiple drum with crawler belt 24 both sides.
Contact with roller 9 and gas-liquid mixed aspirator 12 below crawler belt 24, and under the suitable pressure of infiltration plate 5 liang of side shafts 6, the lower surface of styrofoam 10 and crawler belt 24, comparatively close contact between crawler belt 24 and gas-liquid mixed aspirator 12, to reach good adsorption effect.
Have two blocks of supporting plates to weld together with the width of fixed mount 16 below crawler belt 24, two supporting plates are provided with vibration pump 14, when styrofoam is in process of osmosis, vibration pump 14 shakes, and modification slip is penetrated into the inside of styrofoam.
Crawler belt 24 is arranged on two Athey wheels, and one of them is drive sprocket 11, and another is driven Athey wheel 17, and drive sprocket 11 is driven by drive unit.
When slip is poured on above styrofoam, vibration pump 14 shake and gas-liquid mixed aspirator 12 under the acting in conjunction of vavuum pump intake negative-pressure, modification slip uniformly penetrating to styrofoam particle gap between, the styrofoam particle slip that is modified wraps up uniformly.
Modification slip is under the style of work of vibration pump 14 and gas-liquid mixed aspirator 12, and the unnecessary bin of not infiltration drops onto in feeder 15 below, from the accumulator tank below feeder 15 flows to again.Then, the slip flow down is withdrawn in stirred vessel 2 by reflux, realizes recycling, does not waste cost-saving.
Gas-liquid mixed aspirator 12 is divided into upper and lower two parts, top is divided into a rectangle long recess 12-a, several comparatively macropore is uniformly had below groove 12-a, bottom is divided into the cross section of cavity to be the conical collector 12-b of rectangle, be connected with air intake duct 13 below collector 12-b, in the groove 12-a that such air and slip are inhaled into gas-liquid mixed aspirator 12 and collector 12-b, be withdrawn in gas-liquid separation device eventually through air intake duct 13, isolated slip is flowed back in stirred vessel 2 by reflux.
When gas and slip are drawn onto after in gas-liquid separation device, by separator, gas is separated with slip, unnecessary slip is withdrawn into 2 recyclings in stirred vessel again by reflux again.
The styrofoam of having permeated slip by crawler belt 24 at the wiper of drive unit through twice soft scraper plate 7, unnecessary slip wiper is flowed in collection container 15, transport to again and dry in ventilation unit c, dry ventilation unit c and intergranular for styrofoam modification slip is solidified.
Inorganic modified material is made up of the material of different performance, comprises applied fireproofing, material of gaining in strength, and improves toughness material, improves between inorganic and organic material and wrap up power performance materials etc.
Permeate the styrofoam of slip, after drying and ventilating, neat for styrofoam interval has been put on the shelf of airing, can not pile up.
Claims (10)
1. utilize vacuum suction vibratory drilling method to permeate the production equipment of the styrofoam of inorganic modified material, its feature is as follows: this equipment is by spice part (a) of getting the raw materials ready, infiltration absorbed portion (d), vavuum pump unit (b), dry ventilation unit (c), the composition such as transmission delivery system (e) and reflux (f): spice part (a) of wherein getting the raw materials ready is made up of multiple weighing bucket (1), each weighing bucket (1) is placed on the shelf (21) that welded, this shelf (21) can adjust structure according to the quantity of weighing bucket (1), fully effectively can utilize the space in place like this, the shelf (21) being placed with weighing bucket (1) is equipped with measurement mechanism, the material modified of different performance can be configured accurately by measurement mechanism, reach accurate recipe requirements, after each weighing bucket (1) material modified is ready to, according to performance requirement, pours into successively in stirred vessel (2), feed in raw material while stir, stir.
2. the production equipment utilizing vacuum suction vibratory drilling method to permeate the styrofoam of inorganic modified material according to claim 1, it is characterized in that: after modification slip is stirred in stirred vessel (2), be transported in charge cask (4) by the mateiral pump (22) in conveying system and conveying pipeline, the folding lid (27) of batch turning is arranged at the bottom of charge cask (4), folding lid (27) connects with Spindle Links with charge cask (4), when axle promotes the rotatable handle of axle head under pneumatic linear actuator (26) work, folding lid (27) realizes the action of opening (or conjunction), pneumatic linear actuator (26) adopts chain connection by bearing pin with charge cask (4), pneumatic linear actuator (26) can rotate with bearing pin, pneumatic linear actuator (26) is by the control of electrical control part, realize the flexible of pneumatic linear actuator (26) motion bar.
3. the production equipment utilizing vacuum suction vibratory drilling method to permeate the styrofoam of inorganic modified material according to claim 2, it is characterized in that: when on the infiltration plate (5) below modification slip is poured into from charge cask (4), infiltration plate (5) is uniformly distributed the hole of multiple diameter 5 to 8 millimeters, slip flows uniformly on the upper surface of styrofoam below by the aperture above infiltration plate (5), left and right sides hinge two axles (6) of infiltration plate (5), the length of axle (6) is identical with the width permeating plate (5), when slip flows to styrofoam surperficial, the axle (6) at infiltration plate (5) two ends contacts with styrofoam, the two sides of styrofoam are with baffle plate (8) contact, naturally form the capaciting material groove that a rectangle holds slip like this.
4. the production equipment utilizing vacuum suction vibratory drilling method to permeate the styrofoam of inorganic modified material according to claim 3, it is characterized in that: contact with the upper surface of crawler belt (24) below styrofoam (10), crawler belt (24) is by the shoe chain hinge of the crawler belt bar (24-1) of multiple " work " type with crawler belt (24) both sides, self-assembling formation rectangular apertures between " work " type crawler belt bar (24-1) so between two, slip down can be trickled by space.
5. the production equipment utilizing vacuum suction vibratory drilling method to permeate the styrofoam of inorganic modified material according to claim 4, it is characterized in that: contact with roller (9) and gas-liquid mixed aspirator (12) below crawler belt (24), and under the suitable pressure permeating over glaze (6) under plate (5), the lower surface of styrofoam and crawler belt (24), comparatively close contact between crawler belt (24) and gas-liquid mixed aspirator (12), when vavuum pump (b) vacuumizes, produce good adsorption effect.
6. the production equipment utilizing vacuum suction vibratory drilling method to permeate the styrofoam of inorganic modified material according to claim 4, it is characterized in that: below crawler belt (24), have two blocks of supporting plates to weld together with the width of fixed mount (16), two supporting plates are provided with vibration pump (14).
7. the vacuum suction vibratory drilling method that utilizes according to claim 5 or 6 permeates the production equipment of the styrofoam of inorganic modified material, it is characterized in that: when slip be poured on styrofoam (10) above time, vibration pump (14) vibration and gas-liquid mixed aspirator (12) are under the effect of vavuum pump (b) intake negative-pressure, modification slip uniformly penetrating to styrofoam (10) particle gap between, styrofoam (10) the particle slip that is modified wraps up uniformly.
8. the production equipment utilizing vacuum suction vibratory drilling method to permeate the styrofoam of inorganic modified material according to claim 7, it is characterized in that: modification slip is under the effect of vibration pump (14) and gas-liquid mixed aspirator (12), unnecessary bin flows in feeder (15) below, from the accumulator tank below feeder (15) flows to again, the slip flow down is withdrawn in stirred vessel (2) by reflux, realize recycling, do not waste cost-saving.
9. the production equipment utilizing vacuum suction vibratory drilling method to permeate the styrofoam of inorganic modified material according to claim 8, it is characterized in that: gas-liquid mixed aspirator (12) is divided into upper and lower two parts, top is divided into a groove (12-a), several comparatively macropore is uniformly had below groove, bottom is divided into the cross section of cavity to be the conical collector (12-b) of rectangle, be connected with air intake duct (13) below collector (12-b), in the groove (12-a) that such air and slip are inhaled into gas-liquid mixed aspirator (12) and collector (12-b), be withdrawn in air-breathing separator eventually through air intake duct (13), when gas and slip are drawn onto after in gas-liquid separation device, by separator, gas is separated with slip, unnecessary slip is withdrawn into recycling in stirred vessel (2) again by reflux again.
10. the production equipment utilizing vacuum suction vibratory drilling method to permeate the styrofoam of inorganic modified material according to claim 7, it is characterized in that: the styrofoam (10) of having permeated slip is transported in oven dry ventilation unit (c) by drive unit, dries ventilation unit (c) and intergranular for styrofoam (10) modification slip is solidified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520340091.3U CN204773666U (en) | 2015-05-23 | 2015-05-23 | Utilize production facility of inorganic converted materials's of vacuum adsorption vibration manipulation infiltration polyphenyl board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520340091.3U CN204773666U (en) | 2015-05-23 | 2015-05-23 | Utilize production facility of inorganic converted materials's of vacuum adsorption vibration manipulation infiltration polyphenyl board |
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| Publication Number | Publication Date |
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| CN204773666U true CN204773666U (en) | 2015-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520340091.3U Expired - Fee Related CN204773666U (en) | 2015-05-23 | 2015-05-23 | Utilize production facility of inorganic converted materials's of vacuum adsorption vibration manipulation infiltration polyphenyl board |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107009486A (en) * | 2017-05-16 | 2017-08-04 | 遵义泥牛黄工艺品有限公司 | Pumping slurry machine with self-cleaning function |
| CN108264697A (en) * | 2017-12-26 | 2018-07-10 | 山东信泰节能科技股份有限公司 | A kind of production method of decorative heat-preservation plate |
| CN108927932A (en) * | 2018-08-04 | 2018-12-04 | 郑州中天建筑节能有限公司 | A kind of fire prevention styrofoam infiltration process units |
| CN109849386A (en) * | 2019-03-28 | 2019-06-07 | 宁夏保利节能科技有限公司 | Composite polyphenylene plate producing process and high-frequency vibration composite polyphenylene plate production system |
-
2015
- 2015-05-23 CN CN201520340091.3U patent/CN204773666U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107009486A (en) * | 2017-05-16 | 2017-08-04 | 遵义泥牛黄工艺品有限公司 | Pumping slurry machine with self-cleaning function |
| CN107009486B (en) * | 2017-05-16 | 2022-11-01 | 遵义泥牛黄工艺品有限公司 | Slurry pumping machine with self-cleaning function |
| CN108264697A (en) * | 2017-12-26 | 2018-07-10 | 山东信泰节能科技股份有限公司 | A kind of production method of decorative heat-preservation plate |
| CN108927932A (en) * | 2018-08-04 | 2018-12-04 | 郑州中天建筑节能有限公司 | A kind of fire prevention styrofoam infiltration process units |
| CN109849386A (en) * | 2019-03-28 | 2019-06-07 | 宁夏保利节能科技有限公司 | Composite polyphenylene plate producing process and high-frequency vibration composite polyphenylene plate production system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151118 |
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| CF01 | Termination of patent right due to non-payment of annual fee |