CN106040961B - A kind of high-strength high temperature-resistant 3D printing clay green-sand material and preparation method thereof - Google Patents
A kind of high-strength high temperature-resistant 3D printing clay green-sand material and preparation method thereof Download PDFInfo
- Publication number
- CN106040961B CN106040961B CN201610385736.4A CN201610385736A CN106040961B CN 106040961 B CN106040961 B CN 106040961B CN 201610385736 A CN201610385736 A CN 201610385736A CN 106040961 B CN106040961 B CN 106040961B
- Authority
- CN
- China
- Prior art keywords
- parts
- sand
- green
- resistant
- high 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
- C04B28/16—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing anhydrite, e.g. Keene's cement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention discloses a kind of high-strength high temperature-resistant 3D printing clay green-sand material and its woven fabric methods, are formulated by the raw material of following parts by weight：Kibushi clay 240 260, bentonite 11 13, ceramic microspheres 20 30, magnesium silicate 20 25, Serpenggiante 10 14, volcanic tuff 12 18, dead plaster 34, hydroxyapatite crystal whisker 59, andalusite 15 25, nanometer fluorite powder 10 15, precipitated calcium carbonate 10 14, expanded graphite 79, sodium metaaluminate 68, spinelle 8 12, Dry Flo PC 5 10, carboxymethyl cellulose 35, polyethyleneimine 24, water 10 20.The green-sand of the present invention has the advantages that heat-resist, intensity is high, good permeability, good dispersion, and bleb phenomenon is few.
Description
Invention field
The present invention relates to a kind of molding sand, concretely relate to a kind of high-strength high temperature-resistant 3D printing clay green-sand material
And preparation method thereof.
Background technology
Molding sand is used for the material of moulding in 3D printing.Molding sand is generally by Foundry sand, moulding sand binder and additional thing
Equal Modeling Materials mix according to a certain percentage.Molding sand is different by binder used, can be divided into clay-bonded sand, water-glass sand, water
Silt particle, resin sand etc..With the most of clay-bonded sand, water-glass sand and resin sand.Effect of the molding sand in Foundry Production is extremely heavy
It wants, casting wasted product caused by due to the poor quality of molding sand accounts for about the 30-50% of the total waste product of casting.Usually it is to the requirement of molding sand：
With higher intensity and thermal stability, to bear the effect of various external force and high temperature；Good mobility, i.e., molding sand is in external force
Or the ability being mutually shifted between sand grains under gravity itself；Certain plasticity, i.e. molding sand deform under external force, when outer
The ability of shape to be administered can be kept after power removal；Preferable gas permeability, i.e. molding sand hole penetrate the ability of gas；High bursts
Property, also known as knockability are dissipated, i.e., whether molding sand is easily destroyed after casting solidification, if be easy the performance removed from casting.
Green casting method has many advantages：Without drying, drying equipment and fuel can be saved, extends sandbox and molding sand
Service life, improve worker's working condition, process is simple, and productivity is high, with short production cycle, is convenient for tissue Production line, easily
In the mechanical chemical combination automation for realizing production process.Therefore, green casting is used widely in cast steel.Although wet type with it is dry
Type, which is compared, to be had many advantages, such as, but it does not pass through drying and processing, therefore, when high-temperature molten steel pours fashionable, the interface of metal and wet type
Action-reaction is more strong, and casting is susceptible to some defects.Such as：The water content of green-sand than dry sand be higher by very much, when
When being up to 1500 DEG C of molten steel with temperature and meeting, moisture evaporation, volume is suddenly swollen, and steel-casting is easily made to generate gas hole defect；Clay-bonded sand
Wet strength it is lower than dry strength, under external force be easy drop, formed sand hole；And the sand grains of running gate system wall is in gold
Belong to and being easy to fall off under the souring of liquid stream, is brought by molten metal and form sand holes in casting.Since green-sand itself exists
Disadvantages described above is novel printed material this requires developing a kind of high-strength high temperature-resistant clay green-sand, is made up to preferable
Using effect, to obtain the higher casting of surface quality.
Invention content
The object of the present invention is to provide a kind of high-strength high temperature-resistant 3D printing clay green-sand materials and preparation method thereof.
In order to achieve the above objectives, the technical solution used in the present invention is：
A kind of high-strength high temperature-resistant 3D printing clay green-sand material, which is characterized in that in parts by weight, by following weight
Raw material is formulated：240-260 parts of kibushi clay, 11-13 parts of bentonite, 20-30 parts of ceramic microspheres, magnesium silicate 20-25
Part, 10-14 parts of Serpenggiante, 12-18 parts of volcanic tuff, 3-4 parts of dead plaster, 5-9 parts of hydroxyapatite crystal whisker, andalusite
15-25 parts, 10-15 parts of nanometer fluorite powder, 10-14 parts of precipitated calcium carbonate, 7-9 parts of expanded graphite, 6-8 parts of sodium metaaluminate, point it is brilliant
8-12 parts of stone, 5-10 parts of Dry Flo PC, 3-5 parts of carboxymethyl cellulose, 2-4 parts of polyethyleneimine, water 10-20
Part.
A kind of preparation method of high-strength high temperature-resistant 3D printing clay green-sand material, it is characterised in that including following step
Suddenly：
（1）Serpenggiante, volcanic tuff, andalusite, spinelle are put into 800-900 DEG C of calcining furnace and calcined 4-5 hours,
Then, it takes out, is ground into 60-80 mesh powder, is then put into togerther with kibushi clay, bentonite, ceramic microspheres, magnesium silicate
In stirred tank under the rotating speed of 200-250r/min dry-mixed 8-10min, obtain premix；
（2）By dead plaster, hydroxyapatite crystal whisker, expanded graphite, sodium metaaluminate, Dry Flo PC,
Carboxymethyl cellulose, polyethyleneimine pour into ball mill after grinding distribution 20-30min, with premix, nanometer fluorite powder, light
Remaining raw material mixing such as matter calcium carbonate, adds water wet mixing 10-15min to get high-strength high temperature-resistant 3D printing clay green-sand
Material.
Beneficial effects of the present invention：
By the present invention in that with raw materials such as ceramic microspheres, nanometer fluorite powder, volcanic tuffs, molding sand is set to have good
Gas permeability, mobility, in combination with use precipitated calcium carbonate and Dry Flo PC make molding sand have good height
Warm collapsibility, with excellent Sand sticking-resistant ability, can adapt to a variety of hardening modes, spinelle, Serpenggiante, the red column of addition
The raw materials such as stone, hydroxyapatite crystal whisker improve the green tensile strength and heat resistance of molding sand, the carboxymethyl cellulose used, poly- second
Alkene imines grinding distribution, increases its plasticity, dispersibility.The green-sand of the present invention has heat-resist, intensity height, gas permeability
The advantages that good, good dispersion, bleb phenomenon is few.
Specific implementation mode
Technical solution of the present invention is further described with reference to specific embodiment.
Embodiment 1：
A kind of high-strength high temperature-resistant 3D printing clay green-sand material, in parts by weight, by the preparation of following weight raw material
At：240 parts of kibushi clay, 11 parts of bentonite, 20 parts of ceramic microspheres, 20 parts of magnesium silicate, 10 parts of Serpenggiante, volcanic tuff
12 parts, 3 parts of dead plaster, 5 parts of hydroxyapatite crystal whisker, 15 10 parts of part, nanometer fluorite powder of andalusite, precipitated calcium carbonate 10
Part, is gathered 7 parts of expanded graphite, 6 parts of sodium metaaluminate, 8 parts of spinelle, 5 parts of Dry Flo PC, 3 parts of carboxymethyl cellulose
2 parts of aziridine, 10 parts of water.
A kind of preparation method of high-strength high temperature-resistant 3D printing clay green-sand material, includes the following steps：
（1）Serpenggiante, volcanic tuff, andalusite, spinelle are put into 800-900 DEG C of calcining furnace and calcined 4-5 hours,
Then, it takes out, is ground into 60-80 mesh powder, is then put into togerther with kibushi clay, bentonite, ceramic microspheres, magnesium silicate
In stirred tank under the rotating speed of 200-250r/min dry-mixed 8-10min, obtain premix；
（2）By dead plaster, hydroxyapatite crystal whisker, expanded graphite, sodium metaaluminate, Dry Flo PC,
Carboxymethyl cellulose, polyethyleneimine pour into ball mill after grinding distribution 20-30min, with premix, nanometer fluorite powder, light
Remaining raw material mixing such as matter calcium carbonate, adds water wet mixing 10-15min to get high-strength high temperature-resistant 3D printing clay green-sand
Material.
Embodiment 2：
A kind of high-strength high temperature-resistant 3D printing clay green-sand material, in parts by weight, by the preparation of following weight raw material
At：250 parts of kibushi clay, 12 parts of bentonite, 25 parts of ceramic microspheres, 22 parts of magnesium silicate, 12 parts of Serpenggiante, volcanic tuff
16 parts, 3.5 parts of dead plaster, 7 parts of hydroxyapatite crystal whisker, 20 12 parts of part, nanometer fluorite powder of andalusite, precipitated calcium carbonate 12
Part, 8 parts of expanded graphite, 7 parts of sodium metaaluminate, 10 parts of spinelle, 8 parts of Dry Flo PC, 4 parts of carboxymethyl cellulose,
3 parts of polyethyleneimine, 15 parts of water.
The preparation method is the same as that of Example 1.
Embodiment 3：
A kind of high-strength high temperature-resistant 3D printing clay green-sand material, in parts by weight, by the preparation of following weight raw material
At：260 parts of kibushi clay, 13 parts of bentonite, 30 parts of ceramic microspheres, 25 parts of magnesium silicate, 14 parts of Serpenggiante, volcanic tuff
18 parts, 4 parts of dead plaster, 9 parts of hydroxyapatite crystal whisker, 25 15 parts of part, nanometer fluorite powder of andalusite, precipitated calcium carbonate 14
Part, 9 parts of expanded graphite, 8 parts of sodium metaaluminate, 12 parts of spinelle, 10 parts of Dry Flo PC, 5 parts of carboxymethyl cellulose,
4 parts of polyethyleneimine, 20 parts of water.
The preparation method is the same as that of Example 1.
The performance test results of high-strength high temperature-resistant 3D printing clay green-sand material made from above-described embodiment 1-3 are as follows
Shown in table：
Claims (2)
1. a kind of high-strength high temperature-resistant 3D printing clay green-sand material, which is characterized in that in parts by weight, by following weight original
Material is formulated：240-260 parts of kibushi clay, 11-13 parts of bentonite, 20-30 parts of ceramic microspheres, 20-25 parts of magnesium silicate,
10-14 parts of Serpenggiante, 12-18 parts of volcanic tuff, 3-4 parts of dead plaster, 5-9 parts of hydroxyapatite crystal whisker, andalusite 15-
25 10-15 parts of part, nanometer fluorite powder, 10-14 parts of precipitated calcium carbonate, 7-9 parts of expanded graphite, 6-8 parts of sodium metaaluminate, spinelle 8-
12 parts, 5-10 parts of Dry Flo PC, 3-5 parts of carboxymethyl cellulose, 2-4 parts of polyethyleneimine, 10-20 parts of water;Material
The preparation method of material is, it is characterised in that includes the following steps：
（1）Serpenggiante, volcanic tuff, andalusite, spinelle are put into 800-900 DEG C of calcining furnace and calcine 4-5 hours, so
Afterwards, it takes out, is ground into 60-80 mesh powder, is then put into togerther and stirs with kibushi clay, bentonite, ceramic microspheres, magnesium silicate
The dry-mixed 8-10min under the rotating speed of 200-250r/min is mixed in kettle, premix is obtained；
（2）By dead plaster, hydroxyapatite crystal whisker, expanded graphite, sodium metaaluminate, Dry Flo PC, carboxylic first
Base cellulose, polyethyleneimine pour into ball mill after grinding distribution 20-30min, with premix, nanometer fluorite powder, lightweight carbon
Remaining raw material mixing such as sour calcium, adds water wet mixing 10-15min to get high-strength high temperature-resistant 3D printing clay green-sand material.
2. material according to claim 1, it is characterised in that：There is heat-resist, intensity height, gas permeability in green-sand
Application good, in terms of good dispersion.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610385736.4A CN106040961B (en) | 2016-06-03 | 2016-06-03 | A kind of high-strength high temperature-resistant 3D printing clay green-sand material and preparation method thereof |
| CN201810441626.4A CN108530102A (en) | 2016-06-03 | 2016-06-03 | A kind of high-strength high temperature-resistant 3D printing clay green-sand material and preparation method thereof |
| CN201810707585.9A CN108772533A (en) | 2016-06-03 | 2016-06-03 | A kind of high-strength high temperature-resistant 3D printing clay green-sand material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610385736.4A CN106040961B (en) | 2016-06-03 | 2016-06-03 | A kind of high-strength high temperature-resistant 3D printing clay green-sand material and preparation method thereof |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810441626.4A Division CN108530102A (en) | 2016-06-03 | 2016-06-03 | A kind of high-strength high temperature-resistant 3D printing clay green-sand material and preparation method thereof |
| CN201810707585.9A Division CN108772533A (en) | 2016-06-03 | 2016-06-03 | A kind of high-strength high temperature-resistant 3D printing clay green-sand material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106040961A CN106040961A (en) | 2016-10-26 |
| CN106040961B true CN106040961B (en) | 2018-08-28 |
Family
ID=57172087
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810441626.4A Pending CN108530102A (en) | 2016-06-03 | 2016-06-03 | A kind of high-strength high temperature-resistant 3D printing clay green-sand material and preparation method thereof |
| CN201610385736.4A Active CN106040961B (en) | 2016-06-03 | 2016-06-03 | A kind of high-strength high temperature-resistant 3D printing clay green-sand material and preparation method thereof |
| CN201810707585.9A Pending CN108772533A (en) | 2016-06-03 | 2016-06-03 | A kind of high-strength high temperature-resistant 3D printing clay green-sand material |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810441626.4A Pending CN108530102A (en) | 2016-06-03 | 2016-06-03 | A kind of high-strength high temperature-resistant 3D printing clay green-sand material and preparation method thereof |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810707585.9A Pending CN108772533A (en) | 2016-06-03 | 2016-06-03 | A kind of high-strength high temperature-resistant 3D printing clay green-sand material |
Country Status (1)
| Country | Link |
|---|---|
| CN (3) | CN108530102A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107042302A (en) * | 2017-03-16 | 2017-08-15 | 张丹丹 | It is a kind of to be used for the 3D printing material of pipe fitting in hot-cast technique |
| CN110465618A (en) * | 2019-09-17 | 2019-11-19 | 含山县荣盛机械铸造有限公司 | A kind of preparation method of high-strength environment-friendly clay green-sand |
| CN111872316B (en) * | 2020-06-13 | 2022-04-08 | 天津致勤新型材料有限公司 | 3D printing sand additive and application thereof |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR930012259B1 (en) * | 1991-07-02 | 1993-12-28 | 김수현 | Method of manufacturing casting sand |
| US7087109B2 (en) * | 2002-09-25 | 2006-08-08 | Z Corporation | Three dimensional printing material system and method |
| CN101168651A (en) * | 2006-10-24 | 2008-04-30 | 张弥问 | Powder molding additive and application thereof in preparing various shaping products |
| CN103495693A (en) * | 2013-10-16 | 2014-01-08 | 合肥市田源精铸有限公司 | High-temperature-resisting easy collapse molding sand and preparation method thereof |
| CN103495698A (en) * | 2013-10-16 | 2014-01-08 | 合肥市田源精铸有限公司 | High-strength moulding sand and preparation method thereof |
| CN103553657A (en) * | 2013-10-16 | 2014-02-05 | 合肥市田源精铸有限公司 | Fine magnesia molding sand and its preparation method |
| CN104722757A (en) * | 2014-04-29 | 2015-06-24 | 浙江工贸职业技术学院 | Moulding sand special for laser 3D printing and preparation process and application thereof |
| CN104801664B (en) * | 2015-03-31 | 2017-06-13 | 共享装备有限公司 | A kind of molding sand method for mixing for sand mold 3D printing |
| CN104801655A (en) * | 2015-04-01 | 2015-07-29 | 江守仲 | High-strength foundry casting sand and preparation method thereof |
| CN105127359A (en) * | 2015-08-19 | 2015-12-09 | 合肥市田源精铸有限公司 | High-thermal-stability sand |
-
2016
- 2016-06-03 CN CN201810441626.4A patent/CN108530102A/en active Pending
- 2016-06-03 CN CN201610385736.4A patent/CN106040961B/en active Active
- 2016-06-03 CN CN201810707585.9A patent/CN108772533A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN108772533A (en) | 2018-11-09 |
| CN106040961A (en) | 2016-10-26 |
| CN108530102A (en) | 2018-09-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104801655A (en) | High-strength foundry casting sand and preparation method thereof | |
| CN104493076B (en) | A kind of calcining quartz powder cast paint and preparation method thereof | |
| CN104801656A (en) | Highly fire-resistant foundry sand for steel casting and preparation method of highly fire-resistant foundry sand | |
| CN106040961B (en) | A kind of high-strength high temperature-resistant 3D printing clay green-sand material and preparation method thereof | |
| CN103495693A (en) | High-temperature-resisting easy collapse molding sand and preparation method thereof | |
| CN103521681A (en) | Molding sand and preparation method thereof | |
| CN103521690A (en) | Easily-collapsible mud core molding sand and preparation method thereof | |
| CN104475643A (en) | Carbon steel cast molding sand and preparation method thereof | |
| CN103521695A (en) | Molding sand for casting iron balls and preparation method of molding sand | |
| CN103521691A (en) | Modified bentonite molding sand and preparation method thereof | |
| CN105170894A (en) | Method for preparing flow coating capable of overcoming sulfur seepage defect | |
| CN103586396A (en) | Molding sand for non-ferrous castings and preparation method thereof | |
| CN103521689A (en) | Molding sand for recycling old sand and preparation method thereof | |
| CN104961489A (en) | Environment-friendly energy-saving semi-light-weight refractory castable for iron ladles | |
| CN104475642A (en) | Anti-shakeout foundry molding sand and preparation method thereof | |
| CN103495694A (en) | Yellow-soil foundry sand and preparation method thereof | |
| CN104057011B (en) | A kind of loam core casting sand and preparation method thereof | |
| CN103521677A (en) | Mud-core molding sand and preparation method thereof | |
| CN103521692A (en) | Molding sand for casting aluminum and preparation method thereof | |
| CN106077439A (en) | A kind of train aluminium alloy castings casting easy defeated and dispersed waterglass core sand and preparation method thereof | |
| CN104475648A (en) | Resin molding sand with characteristics of high heat-resistance and gas permeability, and preparation method thereof | |
| CN104439038A (en) | Anti-cracking foundry molding sand and preparation method thereof | |
| CN103521682A (en) | Molding sand used for special casting mould surface and preparation method thereof | |
| CN102746004A (en) | Slag dam for aluminum-sol-combined tundish | |
| CN103521686A (en) | Molding sand for casting brake hub and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20180629 Address after: 518000 Guangdong Shenzhen Longhua New District big wave street Longsheng community Tenglong road gold rush e-commerce incubation base exhibition hall E commercial block 706 Applicant after: Shenzhen step Technology Transfer Center Co., Ltd. Address before: 215011 room 409, 650 Hing Hing Road, hi tech Zone, Suzhou, Jiangsu. Applicant before: Suzhou long dragon aquaculture Co., Ltd. |
|
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20180724 Address after: 150000 Lake Jingpo, Heilongjiang Province, Harbin, Dalian Road North Applicant after: Hakda robotics group (Guangzhou) intellectual property Klc Holdings Ltd, Harbin branch Address before: 518000 Guangdong Shenzhen Longhua New District big wave street Longsheng community Tenglong road gold rush e-commerce incubation base exhibition hall E commercial block 706 Applicant before: Shenzhen step Technology Transfer Center Co., Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |