CN101444823A - 一种粘结剂 - Google Patents
一种粘结剂 Download PDFInfo
- Publication number
- CN101444823A CN101444823A CNA2008101876008A CN200810187600A CN101444823A CN 101444823 A CN101444823 A CN 101444823A CN A2008101876008 A CNA2008101876008 A CN A2008101876008A CN 200810187600 A CN200810187600 A CN 200810187600A CN 101444823 A CN101444823 A CN 101444823A
- Authority
- CN
- China
- Prior art keywords
- binding agent
- parts
- weight
- agent according
- sand
- 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.)
- Granted
Links
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 50
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 46
- 239000004094 surface-active agent Substances 0.000 claims abstract description 10
- 239000003607 modifier Substances 0.000 claims abstract description 3
- 239000011230 binding agent Substances 0.000 claims description 59
- 229920002401 polyacrylamide Polymers 0.000 claims description 20
- 239000007864 aqueous solution Substances 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 9
- 229920002521 macromolecule Polymers 0.000 claims description 8
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 8
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 7
- 229940114926 stearate Drugs 0.000 claims description 7
- BZSXEZOLBIJVQK-UHFFFAOYSA-N 2-methylsulfonylbenzoic acid Chemical compound CS(=O)(=O)C1=CC=CC=C1C(O)=O BZSXEZOLBIJVQK-UHFFFAOYSA-N 0.000 claims description 5
- ANBFRLKBEIFNQU-UHFFFAOYSA-M potassium;octadecanoate Chemical compound [K+].CCCCCCCCCCCCCCCCCC([O-])=O ANBFRLKBEIFNQU-UHFFFAOYSA-M 0.000 claims description 5
- 239000001488 sodium phosphate Substances 0.000 claims description 5
- 229910000162 sodium phosphate Inorganic materials 0.000 claims description 5
- 239000013638 trimer Substances 0.000 claims description 5
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 5
- 229910021538 borax Inorganic materials 0.000 claims description 4
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 4
- 235000013539 calcium stearate Nutrition 0.000 claims description 4
- UQGFMSUEHSUPRD-UHFFFAOYSA-N disodium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound [Na+].[Na+].O1B([O-])OB2OB([O-])OB1O2 UQGFMSUEHSUPRD-UHFFFAOYSA-N 0.000 claims description 4
- 239000004328 sodium tetraborate Substances 0.000 claims description 4
- 239000008116 calcium stearate Substances 0.000 claims description 3
- 229940114930 potassium stearate Drugs 0.000 claims description 3
- 239000011368 organic material Substances 0.000 claims description 2
- 239000004576 sand Substances 0.000 abstract description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 24
- 239000003795 chemical substances by application Substances 0.000 abstract description 11
- 239000000203 mixture Substances 0.000 abstract description 10
- 238000011084 recovery Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000004140 cleaning Methods 0.000 abstract description 2
- 229920000620 organic polymer Polymers 0.000 abstract 1
- 239000002861 polymer material Substances 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 21
- 239000007921 spray Substances 0.000 description 18
- 238000000034 method Methods 0.000 description 12
- 238000005266 casting Methods 0.000 description 9
- 238000002360 preparation method Methods 0.000 description 9
- 238000003756 stirring Methods 0.000 description 9
- 238000004064 recycling Methods 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 239000004743 Polypropylene Substances 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 150000001408 amides Chemical class 0.000 description 6
- -1 polypropylene Polymers 0.000 description 6
- 229920001155 polypropylene Polymers 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 230000002950 deficient Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000004115 Sodium Silicate Substances 0.000 description 4
- 238000007664 blowing Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000003110 molding sand Substances 0.000 description 4
- 229910052911 sodium silicate Inorganic materials 0.000 description 4
- FYSNRPHRLRVCSW-UHFFFAOYSA-N dodecasodium;tetraborate Chemical class [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[O-]B([O-])[O-].[O-]B([O-])[O-].[O-]B([O-])[O-].[O-]B([O-])[O-] FYSNRPHRLRVCSW-UHFFFAOYSA-N 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 102100025222 CD63 antigen Human genes 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 101000934368 Homo sapiens CD63 antigen Proteins 0.000 description 2
- 208000034189 Sclerosis Diseases 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229940088417 precipitated calcium carbonate Drugs 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 239000000375 suspending agent Substances 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Landscapes
- Mold Materials And Core Materials (AREA)
Abstract
Description
射砂压力 | 吹气(空气)压力 | 吹气温度 | 吹气(空气)时间 |
0.5MPa | 0.4MPa | 100℃ | 30秒 |
成品砂型 | 固化15秒的强度 | 固化24小时的强度 | 溃散性能 |
S1 | 0.82MPa | 1.32MPa | 水喷淋后全部溃散 |
S2 | 0.88MPa | 1.54MPa | 水喷淋后大部分溃散,水蒸汽喷淋全部溃散 |
S3 | 0.65MPa | 1.10MPa | 水喷淋后全部溃散 |
S4 | 0.90MPa | 1.58MPa | 水喷淋后大部分溃散,水蒸汽喷淋全部溃散 |
S5 | 0.84MPa | 1.47MPa | 水喷淋后大部分溃散,水蒸汽喷淋全部溃散 |
S6 | 0.85MPa | 1.49MPa | 水喷淋后大部分溃散,水蒸汽喷淋全部溃散 |
S7 | 0.73MPa | 1.25MPa | 水喷淋后全部溃散 |
S8 | 0.77MPa | 1.31MPa | 水喷淋后全部溃散 |
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 200810187600 CN101444823B (zh) | 2008-12-26 | 2008-12-26 | 一种粘结剂 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 200810187600 CN101444823B (zh) | 2008-12-26 | 2008-12-26 | 一种粘结剂 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN101444823A true CN101444823A (zh) | 2009-06-03 |
CN101444823B CN101444823B (zh) | 2013-08-21 |
Family
ID=40740873
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN 200810187600 Active CN101444823B (zh) | 2008-12-26 | 2008-12-26 | 一种粘结剂 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN101444823B (zh) |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101941046A (zh) * | 2010-09-28 | 2011-01-12 | 河北科技大学 | 砂型用复合水玻璃粘结剂及其制作方法 |
CN103146914A (zh) * | 2013-04-06 | 2013-06-12 | 江西理工大学 | 一种冷压高强度萤石球团粘结剂及其使用方法 |
CN103521709A (zh) * | 2013-08-22 | 2014-01-22 | 内蒙古第一机械集团有限公司 | 一种co2气硬自硬耦合硬化水玻璃砂型芯制芯方法 |
CN103553800A (zh) * | 2013-10-31 | 2014-02-05 | 湖北富邦科技股份有限公司 | 一种高浓度圆颗粒氯化钾的制造方法 |
CN104815943A (zh) * | 2015-03-04 | 2015-08-05 | 宁夏共享化工有限公司 | 一种铝合金铸造用新型改性磷酸盐无机粘结剂及其制备方法 |
CN105414465A (zh) * | 2015-11-23 | 2016-03-23 | 合肥李诺新材料贸易有限公司 | 一种泵阀铸件用高活性复合改性水玻璃砂及其制备方法 |
CN105414464A (zh) * | 2015-11-23 | 2016-03-23 | 合肥李诺新材料贸易有限公司 | 一种薄小高光洁度泵阀钢铸件用复合改性水玻璃砂及其制备方法 |
CN106925717A (zh) * | 2017-04-28 | 2017-07-07 | 三门峡阳光铸材有限公司 | 铸造材料用无机粘结剂 |
CN107617716A (zh) * | 2017-10-12 | 2018-01-23 | 东风精密铸造安徽有限公司 | 一种铸造工艺用粘结剂及其制备方法 |
CN110003267A (zh) * | 2019-04-02 | 2019-07-12 | 上海多纶化工有限公司 | 磷酸酯稳定剂 |
CN110015863A (zh) * | 2019-04-17 | 2019-07-16 | 郑州纬通耐火材料科技有限公司 | 一种电熔砖铸造砂型用水玻璃的改性剂及其制备的改性水玻璃 |
CN110640078A (zh) * | 2019-09-29 | 2020-01-03 | 佛山市高明利钢精密铸造有限公司 | 一种铸造用型砂粘结剂 |
CN110732631A (zh) * | 2019-11-28 | 2020-01-31 | 山东永创材料科技有限公司 | 一种铸造材料用粘结剂及其制备工艺 |
CN110961575A (zh) * | 2019-12-16 | 2020-04-07 | 宁国市铸丰钢球铸造有限公司 | 一种砂型模具的成型方法 |
CN113523186A (zh) * | 2021-07-19 | 2021-10-22 | 北京科技大学 | 一种铸造模具及工艺 |
CN114472796A (zh) * | 2022-01-21 | 2022-05-13 | 中国第一汽车股份有限公司 | 一种具有溃散性的改性无机粘结剂砂及制取方法 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1007043B (zh) * | 1987-02-26 | 1990-03-07 | 大连起重机器厂 | 有机改性水玻璃粘结剂的制造方法 |
CN1020370C (zh) * | 1990-05-11 | 1993-04-28 | 天津碱厂 | 水玻璃砂溃散剂 |
CN1069559C (zh) * | 1999-05-26 | 2001-08-15 | 沈阳市铸造材料研究所 | 一种铸造用改性水玻璃及其制备 |
CN1304140C (zh) * | 2004-06-23 | 2007-03-14 | 上海市机械制造工艺研究所 | 型砂粘结剂及其制备方法 |
CN1721103A (zh) * | 2004-07-17 | 2006-01-18 | 王继启 | 铸造用型砂粘溃剂 |
CA2576158C (en) * | 2004-08-05 | 2020-10-27 | Corium International, Inc. | Adhesive composition |
-
2008
- 2008-12-26 CN CN 200810187600 patent/CN101444823B/zh active Active
Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101941046A (zh) * | 2010-09-28 | 2011-01-12 | 河北科技大学 | 砂型用复合水玻璃粘结剂及其制作方法 |
CN101941046B (zh) * | 2010-09-28 | 2013-01-09 | 河北科技大学 | 砂型用复合水玻璃粘结剂及其制作方法 |
CN103146914A (zh) * | 2013-04-06 | 2013-06-12 | 江西理工大学 | 一种冷压高强度萤石球团粘结剂及其使用方法 |
CN103146914B (zh) * | 2013-04-06 | 2014-11-05 | 江西理工大学 | 一种冷压高强度萤石球团粘结剂及其使用方法 |
CN103521709A (zh) * | 2013-08-22 | 2014-01-22 | 内蒙古第一机械集团有限公司 | 一种co2气硬自硬耦合硬化水玻璃砂型芯制芯方法 |
CN103521709B (zh) * | 2013-08-22 | 2015-12-02 | 内蒙古第一机械集团有限公司 | 一种co2气硬自硬耦合硬化水玻璃砂型芯制芯方法 |
CN103553800A (zh) * | 2013-10-31 | 2014-02-05 | 湖北富邦科技股份有限公司 | 一种高浓度圆颗粒氯化钾的制造方法 |
CN103553800B (zh) * | 2013-10-31 | 2014-12-31 | 湖北富邦科技股份有限公司 | 一种高浓度圆颗粒氯化钾的制造方法 |
CN104815943A (zh) * | 2015-03-04 | 2015-08-05 | 宁夏共享化工有限公司 | 一种铝合金铸造用新型改性磷酸盐无机粘结剂及其制备方法 |
CN105414464A (zh) * | 2015-11-23 | 2016-03-23 | 合肥李诺新材料贸易有限公司 | 一种薄小高光洁度泵阀钢铸件用复合改性水玻璃砂及其制备方法 |
CN105414465A (zh) * | 2015-11-23 | 2016-03-23 | 合肥李诺新材料贸易有限公司 | 一种泵阀铸件用高活性复合改性水玻璃砂及其制备方法 |
CN106925717A (zh) * | 2017-04-28 | 2017-07-07 | 三门峡阳光铸材有限公司 | 铸造材料用无机粘结剂 |
CN107617716A (zh) * | 2017-10-12 | 2018-01-23 | 东风精密铸造安徽有限公司 | 一种铸造工艺用粘结剂及其制备方法 |
CN110003267A (zh) * | 2019-04-02 | 2019-07-12 | 上海多纶化工有限公司 | 磷酸酯稳定剂 |
CN110003267B (zh) * | 2019-04-02 | 2021-05-07 | 上海多纶化工有限公司 | 磷酸酯稳定剂 |
CN110015863A (zh) * | 2019-04-17 | 2019-07-16 | 郑州纬通耐火材料科技有限公司 | 一种电熔砖铸造砂型用水玻璃的改性剂及其制备的改性水玻璃 |
CN110640078A (zh) * | 2019-09-29 | 2020-01-03 | 佛山市高明利钢精密铸造有限公司 | 一种铸造用型砂粘结剂 |
CN110732631A (zh) * | 2019-11-28 | 2020-01-31 | 山东永创材料科技有限公司 | 一种铸造材料用粘结剂及其制备工艺 |
CN110961575A (zh) * | 2019-12-16 | 2020-04-07 | 宁国市铸丰钢球铸造有限公司 | 一种砂型模具的成型方法 |
CN110961575B (zh) * | 2019-12-16 | 2021-07-13 | 宁国市铸丰钢球铸造有限公司 | 一种砂型模具的成型方法 |
CN113523186A (zh) * | 2021-07-19 | 2021-10-22 | 北京科技大学 | 一种铸造模具及工艺 |
CN114472796A (zh) * | 2022-01-21 | 2022-05-13 | 中国第一汽车股份有限公司 | 一种具有溃散性的改性无机粘结剂砂及制取方法 |
Also Published As
Publication number | Publication date |
---|---|
CN101444823B (zh) | 2013-08-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN101444823B (zh) | 一种粘结剂 | |
CN101360574A (zh) | 铸型造型方法 | |
EP0016789B1 (en) | Novel method of making foundry molds and adhesively bonded composites | |
CN100503081C (zh) | 一种铸造造型、制芯用粘结剂及其制备方法 | |
US3306864A (en) | Phenol formaldehyde-urea resin component binder | |
EP2323783A1 (de) | Mit wasserglas beschichteter und/oder vermischter kern- oder formsand mit einem wassergehalt im bereich von > etwa 0,25 gew.-% bis etwa 0,9 gew.-% | |
CN101039884A (zh) | 含有缩合单宁和糠醇的粘结剂组合物及其用途 | |
CN109641265B (zh) | 铸模的制造方法 | |
JP2014051643A (ja) | 2剤式エアロゲル成形体材料、及び、それを用いた断熱材、並びに、断熱材の製造方法 | |
US3645491A (en) | Soluble metal casting cores comprising a water-soluble salt and a synthetic resin | |
CN1491254A (zh) | 高分子复合泡沫材料 | |
CN104428082A (zh) | 盐基型芯、其制备方法及其应用 | |
KR20140072149A (ko) | 코어 및 코어 제조 방법 | |
CN102533168A (zh) | 一种水性零甲醛玻璃棉粘合剂及其制备方法 | |
CN117777602B (zh) | 一种可降解塑料母粒及其制备方法 | |
JP5536384B2 (ja) | 変性フェノール樹脂の製造方法、フェノール樹脂組成物、耐火物組成物、鋳型用レジンコーテッドサンド、成形材料、不織布、硬化物、炭化物、活性炭 | |
CN105431480A (zh) | 泡沫复合材料 | |
CN107257821A (zh) | 热固泡沫和使用还原糖和胺的制造方法 | |
CN105452357A (zh) | 用于制备泡沫复合材料的方法 | |
PL205270B1 (pl) | Układ spoiwowy, sposób jego wytwarzania, masa formierska oraz sposób wytwarzania kształtki lanej i sposób odlewania metalu | |
JP7202238B2 (ja) | コーテッドサンド及びそれを用いた鋳型の製造法 | |
JP2019532836A (ja) | ノボラックポリウレタンベースの結合剤系を用いた成形体の層ごとの構築のための方法 | |
JP6216637B2 (ja) | 自硬性鋳型の製造方法、鋳型用粘結剤キット、及び鋳型用組成物 | |
CN108658544A (zh) | 一种水泥基保温板的制备方法 | |
JP6565011B2 (ja) | 鋳型の製造方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Binder Effective date of registration: 20160302 Granted publication date: 20130821 Pledgee: Industrial Commercial Bank of China Ltd. Zhangqiu branch Pledgor: JINAN SHENGQUAN GROUP SHARE HOLDING Co.,Ltd. Registration number: 2016990000130 |
|
PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20190709 Granted publication date: 20130821 Pledgee: Industrial Commercial Bank of China Ltd. Zhangqiu branch Pledgor: JINAN SHENGQUAN GROUP SHARE HOLDING Co.,Ltd. Registration number: 2016990000130 |
|
PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Binder Effective date of registration: 20200319 Granted publication date: 20130821 Pledgee: Qilu bank Limited by Share Ltd. Ji'nan Zhangqiu branch Pledgor: JINAN SHENGQUAN GROUP SHARE HOLDING Co.,Ltd. Registration number: Y2020980000873 |
|
PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230413 Granted publication date: 20130821 Pledgee: Qilu bank Limited by Share Ltd. Ji'nan Zhangqiu branch Pledgor: JINAN SHENGQUAN GROUP SHARE HOLDING Co.,Ltd. Registration number: Y2020980000873 |