CN102357965B - Hot-air cycling system for slobbering machine and use method - Google Patents
Hot-air cycling system for slobbering machine and use method Download PDFInfo
- Publication number
- CN102357965B CN102357965B CN2011102656670A CN201110265667A CN102357965B CN 102357965 B CN102357965 B CN 102357965B CN 2011102656670 A CN2011102656670 A CN 2011102656670A CN 201110265667 A CN201110265667 A CN 201110265667A CN 102357965 B CN102357965 B CN 102357965B
- Authority
- CN
- China
- Prior art keywords
- section
- drying tunnel
- air
- hot air
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Drying Of Solid Materials (AREA)
Abstract
The invention relates to a hot-air cycling system for a slobbering machine and a use method. The hot air derived from a system heater is divided into two paths, wherein one path is connected to a rear drum cavity; the other path is connected to an air inlet of static pressure boxes of a section of a lower drying channel with the highest temperature; the section of the lower drying channel is a section which is in front of and adjacent to a cooling section; hot air pipes which are derived from the section of the lower drying channel and the rear drum cavity are converged and then are connectedto an air inlet of a drying channel which is in front of and adjacent to the section of the lower drying channel; the hot air pipes derived from the air outlets of all sections of drying channels arein turn connected to the air inlets of the front adjacent drying channels and to an air outlet of a first upper drying channel close to a front drum; the hot air pipe of the first upper drying channel is divided into two paths; one path is connected to a solvent recovery device through a recycling fan and then returns to the heater for cycling again; and the other path is connected to an air feeding fan for directly cycling again. The method is used for adjusting the heater and each valve, controlling temperature and pressure of each drying channel and controlling the proportion of waste gas entering into the solvent recovery device. The hot air pipes of all drying sections in the hot-air cycling system are serially connected according to a from-high-to-low sequence of technical temperature; heat is fully utilized; energy is obviously saved; cost of equipment is low; and pollution is little.
Description
(1) technical field
The present invention relates to produce the structure of the slobbering machine of film, be specially a kind of hot air circulating system and using method of slobbering machine.
(2) background technology
Slobbering machine is the electromechanical integration equipment of film, plastic band, artificial leather and the similar synthetic material of solwution method production various uses.Mainly comprise hydrostomia mouth, preceding drum and main drive gear, steel band, back drum and drying device.Ring steel belt before being looped around on drum and the back drum is carrier, squeezes liquid film on steel band through the hot blast drying tunnel with the hydrostomia mouth, makes the solvent evaporation, obtains dried solid film material.
The drying tunnel of channel-type, hot blast and steel band drive in the wrong direction.Liquid film will move the regular hour in drying tunnel could be dry, influence speed of production, and temperature is wayward.
The drying tunnel up and down of more advanced drying device is divided into multistage, and each section of the following drying tunnel that the last drying tunnel that up steel band passes through and descending steel band pass through is divided into plenum chamber up and down again, and every section drying tunnel is furnished with independent heater and hot air circulation pipeline.This kind hot air drying system has improved heat transfer efficiency, and hot blast is evenly distributed, and speed of production and quality all significantly improve.It is energy-conservation that its shortcoming is that a plurality of heaters and many group hot air circulation pipelines are unfavorable for, moreover because of the pipeline complexity, and maintenance management is difficulty relatively also.
(3) summary of the invention
The objective of the invention is to design a kind of hot air circulating system and using method of slobbering machine, need each section hot air duct series connection of drying tunnel up and down of heating, hot air duct is from the following drying tunnel of that the highest section of temperature, introduce other section drying tunnel that temperature reduces one by one successively.
The hot air circulating system of the slobbering machine of the present invention's design comprises heater, blower fan, hot air duct and solvent recovery facility, the front end of upper and lower drying tunnel is that preceding tympanum, rear end are the back tympanum, steel band is around preceding drum and back drum, the following drying tunnel that the last drying tunnel that up steel band passes through and descending steel band pass through respectively is divided into 2～5 sections, every section is divided into upper and lower 2 plenum chambers by steel band, each plenum chamber is equipped with air inlet and air outlet, and each air inlet all leads to and is distributed in a plurality of nozzles facing to the steel strip surface salivation film in the plenum chamber.The 1st section of the inverse of the following drying tunnel of close preceding drum or inverse are cooling section for the 1st and the 2nd section, cooling section has the independent cooling air circulatory system (comprising filter), the following drying tunnel of that section in the place ahead that cooling section is adjacent is the highest drying tunnel of temperature in the native system, the hot blast of drawing from heater is divided into two-way after through filter and blower fan, one tunnel air inlet through filter access back tympanum, another road is through on the filter following drying tunnel of that section that cut-in temperature is the highest respectively, the air inlet of following plenum chamber, from then on section down drying tunnel on, the warm-air pipe that the air outlet of following plenum chamber is drawn and from the air outlet warm-air pipe of drawing of back tympanum converge by blower fan insert the following drying tunnel in one section in the highest adjacent the place ahead of one section following drying tunnel of this temperature or go up drying tunnel on, the air inlet of following plenum chamber.With aforementioned similar, the warm-air pipe that the air outlet of the upper and lower plenum chamber of every section drying tunnel is drawn all inserts the air inlet of the upper and lower plenum chamber of the one section drying tunnel in adjacent the place ahead again through blower fan, go up drying tunnel for first section of extremely close preceding drum, the warm-air pipe that this section gone up the upper and lower plenum chamber air outlet of drying tunnel is divided into 2 the tunnel, one the tunnel through reclaiming blower fan access solvent recovery facility, and breeze fan is then inserted on another road.Waste gas in the warm-air pipe of last road enters the solvent recovery facility and reclaims solvent vapo(u)r in the hot blast, and heater return again reheats afterwards, begins again to circulate again; The waste gas on another road then directly by the breeze fan suction, participate in hot air circulation again directly.
In order to guarantee the quality of salivation film, purification enters the gas of drying tunnel, the warm-air pipe of introducing the upper and lower plenum chamber air inlet of every section drying tunnel all is equipped with filter, hot blast enters the upper and lower plenum chamber of this section drying tunnel again through filter, and filter further purifies organic and inorganic and poly-doped impurities such as metal impurities in the hot air circulation gas, asbestos.
On 2 road pipelines that the warm-air pipe of the air outlet of final stage drying tunnel is divided into valve is installed all, can regulates the amount that enters the solvent recovery facility.The solvent recovery facility is when reclaiming solvent, to lower the temperature to waste gas, only be 1.0～15.0 ℃ so return the gas temperature of breeze fan participation circulation after reclaiming, and the EGT that does not enter the solvent recovery facility is generally 60～120 ℃, adopt the directly circulation again of part waste gas, can take full advantage of heat, cut down the consumption of energy.
Because the temperature of each section drying tunnel forwards progressively reduces from the following drying tunnel of the highest that section of temperature, so the hot blast that the rear plenum chamber is discharged can be used for the heat drying of the place ahead plenum chamber.
Temperature for the temperature of regulating the following drying tunnel of the highest that section of temperature and back tympanum, under this section, in the tympanum of in the plenum chamber of drying tunnel and back temperature sensor is installed all, according to the signal of this two temperature sensor, regulate the power of heater, namely regulate the hot blast temperature of heater output.
For wind speed and each the drying tunnel internal pressure that guarantees each plenum chamber nozzle that air inlet connects, in each section drying tunnel, pressure sensor is installed, on the pipeline before each section drying tunnel air inlet valve is installed, Signal Regulation valve control intake according to each section drying tunnel pressure sensor, thereby wind speed and pressure in the control plenum chamber have also been controlled the temperature of each section.
The using method of the hot air circulating system of the slobbering machine of the present invention's design is as follows:
Breeze fan is sent hot blast into the highest that section drying tunnel of temperature, regulates heater power, and regulates and enter the solvent recovery facility and enter valve on the exhaust piping of breeze fan, and making this section drying tunnel temperature is 160～220 ℃, and pressure is-200～50 handkerchiefs; Valve after adjusting enters on the hot air duct of tympanum, making the temperature of back tympanum is 160～220 ℃; Adjusting enters the valve on the hot air duct of each section drying tunnel at its rear, makes the pressure of rear each section drying tunnel remain-200～50 handkerchiefs, and temperature descends 15～20 ℃ than the place ahead drying tunnel successively.
Adjusting enters the solvent recovery facility and enters valve opening on the exhaust piping of breeze fan, makes the waste gas that reclaims blower fan suction solvent recovery facility account for 20%～80% of exhausted air quantity that warm-air pipe sends back to.
The hot air circulating system of slobbering machine of the present invention and the advantage of using method are: 1, the hot air duct of each section of drying tunnel is according to curtain coating technology design temperature connected in series, closed circulation from high to low, and the heat of hot blast takes full advantage of, and energy-saving effect is remarkable; 2, native system only need dispose a heater, a cover hot air circulation pipeline, and equipment cost reduces; 3, the power of the temperature sensor signal control heater of the temperature by the following drying tunnel of the highest that section of temperature and back tympanum, by the pressure sensor signal of each section, control valve is controlled wind speed and the pressure of each section hot blast, and operation is simple in field control; 4, hot blast circulates in the system of sealing, and the solvent recovery facility reclaims the solvent vapo(u)r in the hot blast, does not externally have the solvent exhaust gas discharging, has significantly reduced pollution; 5, the hot air circulation of salivation film drying need not to use external air in the film production process, thereby has improved the cleannes of hydrostomia hot blast, has guaranteed the surface quality of film product.
(4) description of drawings
Fig. 1 is the hot air circulating system example structure schematic diagram of this slobbering machine.
The figure internal label is: 1, preceding tympanum, 2, preceding drum, 3, steel band, 4, the back drum, 5, the back tympanum, 6, valve.
(5) specific embodiment
The hot air circulating system embodiment of slobbering machine
The hot air circulating system embodiment of this slobbering machine as shown in Figure 1, comprise heater, blower fan, hot air duct and solvent recovery facility, the front end of upper and lower drying tunnel is that preceding tympanum 1, rear end are back tympanum 5, steel band 3 is around preceding drum 2 and back drum 4, last drying tunnel and following drying tunnel respectively are divided into 2 sections, be the last drying tunnel 1 among Fig. 1, last drying tunnel 2, following drying tunnel 1, following drying tunnel 2, steel band is successively by four sections drying tunnels, every section is divided into upper and lower 2 plenum chambers by steel band, air inlet S and air outlet E are arranged in each plenum chamber, and each air inlet S all connects a plurality of nozzles facing to the steel strip surface salivation film.Following drying tunnel 2 near preceding drum 2 is cooling section, and the independent cooling air circulatory system is arranged.The following drying tunnel 1 in the place ahead that cooling section is adjacent is the highest drying tunnel of temperature in this routine system.The hot blast of drawing from heater is divided into two-way behind grade one filter 1F and breeze fan 2BA, one the tunnel after secondary filter 2Fa inserts the air inlet S of tympanum 5, another Lu Zejing secondary filter 2Fb inserts down the air inlet S of the upper and lower plenum chamber of drying tunnel 1 respectively, the warm-air pipe of drawing from the following air outlet E of the upper and lower plenum chamber of drying tunnel 1 and converge air inlet by the upper and lower plenum chamber of drying tunnel 2 in blower fan 3BA and the secondary filter 3Fb access from the warm-air pipe that the air outlet E of back tympanum 5 draws.The warm-air pipe that the air outlet of the upper and lower plenum chamber of last drying tunnel 2 is drawn is the air inlet of the upper and lower plenum chamber of drying tunnel 1 on blower fan 4BA the place ahead adjacent with secondary filter 4Fb access again, the warm-air pipe of the upper and lower plenum chamber air outlet of last drying tunnel 1 is divided on 2 road pipelines, and one tunnel pipeline insert to reclaim blower fan 1BA, enters the solvent recovery facility system again through valve; The pipeline on another road then inserts breeze fan 2BA through another valve, participates in hot air circulation again.
Send into the waste gas of solvent recovery facility through return air fan 1BA, solvent vapo(u)r in the hot blast is recovered afterwards heater return again, after reheating, begin again to circulate again, directly enter the hot air circulation that is directly participated in follow-up each bringing-up section by the waste gas of breeze fan 2BA again.Arrow among Fig. 1 on the hot air duct is represented the hot blast direct of travel.
In the back tympanum 5 temperature sensor 2TA is installed, in the plenum chamber of following drying tunnel 1, temperature sensor 1TA is installed.
Pressure sensor PA is installed in each section drying tunnel, on the pipeline before each section drying tunnel air inlet valve 6 is installed.
The using method embodiment of the hot air circulating system of slobbering machine
This using method embodiment adopts the hot air circulating system embodiment of above-mentioned slobbering machine,
Breeze fan is sent hot blast into the highest following drying tunnel 1 of temperature, regulate heater power, and regulate valve on the exhaust piping enter the solvent recovery facility and to enter breeze fan, this example makes down drying tunnel 1 temperature be respectively 160 ℃, 180 ℃, 190 ℃, 200 ℃, 220 ℃ after regulating, and pressure is controlled to be-20～50 handkerchiefs; Valve after adjusting enters on the hot air duct of tympanum, making the temperature of back tympanum is 160 ℃, 180 ℃, 180 ℃, 200 ℃, 220 ℃; Adjusting enters the valve on the hot air duct of each section drying tunnel at its rear, makes the pressure of rear each section drying tunnel remain-200～50 handkerchiefs, and temperature descends 15～20 ℃ than the place ahead drying tunnel successively.
Regulate to insert reclaim the valve on the hot air duct of blower fan 1BA and insert the aperture ratio of another valve of the hot air duct of breeze fan 2BA, make the waste gas of suction solvent recovery facility account for 20%～80% of waste gas total amount that warm-air pipe sends back to.
The temperature and pressure test result of each section of using method embodiment drying tunnel of the hot air circulating system of this slobbering machine and energy-conservation situation statistics are as shown in table 1.Liquid film passes through last drying tunnel 1 successively, goes up drying tunnel 2, descends drying tunnel 1, and temperature progressively raises, and film solidifies smoothly, cools at following drying tunnel 2, returns preceding tympanum, peels off from steel band.And compare with former hot-air system, the economize on electricity situation of native system is remarkable.
Each section of this example of table 1 drying tunnel temperature pressure test result and energy-conservation situation statistics list
Above-described embodiment is the specific case that purpose of the present invention, technical scheme and beneficial effect are further described only, and the present invention is defined in this.All any modifications of within scope of disclosure of the present invention, making, be equal to replacement, improvement etc., all be included within protection scope of the present invention.
Claims (7)
1. the hot air circulating system of slobbering machine, comprise heater, blower fan, hot air duct and solvent recovery facility, the front end of upper and lower drying tunnel is that preceding tympanum, rear end are the back tympanum, steel band is around preceding drum and back drum, the following drying tunnel that the last drying tunnel that up steel band passes through and descending steel band pass through respectively is divided into 2～5 sections, every section is divided into upper and lower 2 plenum chambers by steel band, and air inlet and air outlet are arranged in each plenum chamber, and each air inlet all connects a plurality of nozzles facing to the steel strip surface salivation film; The 1st section of the inverse of the following drying tunnel of close preceding drum or inverse are cooling section for the 1st and the 2nd section, it is characterized in that:
Described cooling section has the independent cooling air circulatory system;
The following drying tunnel of that section in the place ahead that cooling section is adjacent is the highest drying tunnel of temperature in the native system, the hot blast of drawing from heater is divided into two-way behind grade one filter and breeze fan, one the tunnel after secondary filter inserts the air inlet of tympanum, on another Lu Zejing secondary filter following drying tunnel of that section that cut-in temperature is the highest respectively, the air inlet of following plenum chamber, from then on section down drying tunnel on, the warm-air pipe that the air outlet of following plenum chamber is drawn and from the air outlet warm-air pipe of drawing of back tympanum converge by blower fan insert the following drying tunnel in one section in the highest adjacent the place ahead of one section following drying tunnel of this temperature or go up drying tunnel on, the air inlet of following plenum chamber; The warm-air pipe that the air outlet of the upper and lower plenum chamber of every section drying tunnel is drawn all inserts the air inlet of the upper and lower plenum chamber of the one section drying tunnel in adjacent the place ahead again through blower fan, go up drying tunnel for first section of extremely close preceding drum, the warm-air pipe that this section gone up the upper and lower plenum chamber air outlet of drying tunnel is divided into 2 the tunnel, one the tunnel through reclaiming blower fan access solvent recovery facility, and breeze fan is then inserted on another road; Waste gas in the warm-air pipe of last road enters the solvent recovery facility, afterwards heater return again.
2. the hot air circulating system of slobbering machine according to claim 1 is characterized in that:
On described first section 2 road pipeline that upward warm-air pipe of the upper and lower plenum chamber air outlet of drying tunnel is divided near preceding drum valve is installed all.
3. the hot air circulating system of slobbering machine according to claim 1 is characterized in that:
Warm-air pipe before the air inlet of the upper and lower plenum chamber of every section drying tunnel all is equipped with filter.
4. according to the hot air circulating system of each described slobbering machine in the claim 1 to 3, it is characterized in that:
In the interior and back tympanum of one section following drying tunnel that described temperature is the highest temperature sensor is installed all.
5. according to the hot air circulating system of each described slobbering machine in the claim 1 to 3, it is characterized in that:
In each section drying tunnel, pressure sensor is installed, on the pipeline before each section drying tunnel air inlet valve is installed.
6. the using method of the hot air circulating system of slobbering machine according to claim 5 is characterized in that:
Breeze fan is sent hot blast into the highest that section drying tunnel of temperature, regulates heater power, and regulates and enter the solvent recovery facility and enter valve on the exhaust piping of breeze fan, and making this section drying tunnel temperature is 160～220 ℃, and pressure is-200～50 handkerchiefs; Valve after adjusting enters on the hot air duct of tympanum, making the temperature of back tympanum is 160～220 ℃; Adjusting enters the valve on the hot air duct of each section drying tunnel at its rear, makes the pressure of rear each section drying tunnel remain-200～50 handkerchiefs, and temperature descends 15～20 ℃ than the place ahead drying tunnel successively.
7. the using method of the hot air circulating system of slobbering machine according to claim 6 is characterized in that:
Adjusting enters the solvent recovery facility and enters the aperture of the valve on the exhaust piping of breeze fan, makes the waste gas that reclaims blower fan suction solvent recovery facility account for 20%～80% of exhausted air quantity that warm-air pipe sends back to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102656670A CN102357965B (en) | 2011-09-08 | 2011-09-08 | Hot-air cycling system for slobbering machine and use method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102656670A CN102357965B (en) | 2011-09-08 | 2011-09-08 | Hot-air cycling system for slobbering machine and use method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102357965A CN102357965A (en) | 2012-02-22 |
| CN102357965B true CN102357965B (en) | 2013-09-18 |
Family
ID=45583372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102656670A Active CN102357965B (en) | 2011-09-08 | 2011-09-08 | Hot-air cycling system for slobbering machine and use method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102357965B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112606293A (en) * | 2020-12-14 | 2021-04-06 | 江苏五九设计营造有限公司 | Cast sheet workshop section clean system |
| CN116423726A (en) * | 2023-04-12 | 2023-07-14 | 山东欧亚新材料科技有限公司 | Baking oven of casting machine and novel thermal polyimide film production process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1868716A (en) * | 2006-04-27 | 2006-11-29 | 溧阳华晶电子材料有限公司 | Polyimide film curtain coating technology and equipment |
| CN101506697A (en) * | 2006-08-24 | 2009-08-12 | 柯尼卡美能达精密光学株式会社 | Optical film, process for producing the same, and polarization plate utilizing the film |
| CN201559281U (en) * | 2009-12-23 | 2010-08-25 | 天津恒通时代电工材料科技有限公司 | Ventilating system for casting machine |
| CN202293145U (en) * | 2011-09-08 | 2012-07-04 | 桂林电器科学研究院 | Hot air circulating system of slobbering machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101146660B (en) * | 2005-03-25 | 2011-07-13 | 富士胶片株式会社 | Polymer film and its manufacturing method |
-
2011
- 2011-09-08 CN CN2011102656670A patent/CN102357965B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1868716A (en) * | 2006-04-27 | 2006-11-29 | 溧阳华晶电子材料有限公司 | Polyimide film curtain coating technology and equipment |
| CN101506697A (en) * | 2006-08-24 | 2009-08-12 | 柯尼卡美能达精密光学株式会社 | Optical film, process for producing the same, and polarization plate utilizing the film |
| CN201559281U (en) * | 2009-12-23 | 2010-08-25 | 天津恒通时代电工材料科技有限公司 | Ventilating system for casting machine |
| CN202293145U (en) * | 2011-09-08 | 2012-07-04 | 桂林电器科学研究院 | Hot air circulating system of slobbering machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102357965A (en) | 2012-02-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203243888U (en) | Tea leaf continuous dryer capable of utilizing thermal energy circularly | |
| CN104329923B (en) | Utilize method and the equipment thereof of power-plant flue gas waste heat dried biomass fuel | |
| CN102851420A (en) | Steelmaking residual heat step recycling method | |
| CN106242229B (en) | Sludge dewatering treatment device | |
| CN203561164U (en) | Multilayer belt drying system | |
| CN105961582B (en) | Heat pump grain drying system | |
| CN106739468A (en) | A kind of printing machine hot air circulating system | |
| CN205014851U (en) | Sintering deposit shows heat reclamation device | |
| CN110078349B (en) | Sludge low-temperature drying device and method | |
| CN102357965B (en) | Hot-air cycling system for slobbering machine and use method | |
| CN201718382U (en) | Equal-pressure grain drying tower | |
| CN103712436A (en) | Waste heat recycling system and device | |
| CN202293145U (en) | Hot air circulating system of slobbering machine | |
| CN101693868B (en) | Energy-saving air preprocessing method and device thereof | |
| CN203572161U (en) | Thin film drying device | |
| CN203683993U (en) | Ordinary-pressure superheated steam molded pulp drier | |
| CN203642645U (en) | Drying system | |
| CN202768087U (en) | Small steam turbine exhaust steam cold source loss recovery system | |
| CN206368102U (en) | A kind of sludge two-stage dehumidifying anhydration system | |
| CN102072632A (en) | Forced central air intake and exhaust system of wood drying device | |
| CN101911969A (en) | Isobaric grain-drying tower | |
| CN201841669U (en) | Device for recovering heat energy of high-speed biaxially oriented polypropylene (BOPP) production line | |
| CN203704619U (en) | Waste heat recovery recycling apparatus | |
| CN201414374Y (en) | Novel cooling unit | |
| CN205939997U (en) | Grain drying machine with dual cycle wind channel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent for invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 541004 the Guangxi Zhuang Autonomous Region Guilin Qixing Road, No. 1 Applicant after: Guilin Electrical Equipment Scientific Research Institute Co., Ltd. Address before: 541004 the Guangxi Zhuang Autonomous Region Guilin Qixing Road, No. 1 Applicant before: Guilin Electrical Appliace Science Research Institute |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: GUILIN ELECTRICAL EQUIPMENT SCIENTIFIC RESEARCH INSTITUTE TO: GUILIN ELECTRICAL EQUIPMENT SCIENTIFIC RESEARCH INSTITUTE CO., LTD. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |