CN109095935A - A kind of dedicated lost foam paint of lost foam casting process and its manufacture craft - Google Patents
A kind of dedicated lost foam paint of lost foam casting process and its manufacture craft Download PDFInfo
- Publication number
- CN109095935A CN109095935A CN201811167299.4A CN201811167299A CN109095935A CN 109095935 A CN109095935 A CN 109095935A CN 201811167299 A CN201811167299 A CN 201811167299A CN 109095935 A CN109095935 A CN 109095935A
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- Prior art keywords
- lost foam
- casting process
- dedicated
- manufacture craft
- stirring
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- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3418—Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
- C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
- C04B2235/3472—Alkali metal alumino-silicates other than clay, e.g. spodumene, alkali feldspars such as albite or orthoclase, micas such as muscovite, zeolites such as natrolite
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/349—Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
- C04B2235/422—Carbon
- C04B2235/425—Graphite
Abstract
The present invention relates to a kind of dedicated lost foam paints of lost foam casting process, including silica flour 80%-90% and bentonite 5%-8%, it further include redispersible latex powder 1.5%-2.3%, environment-friendly adhesive 1.5%-2.6%, graphite 1%-2%, mica powder 5%-8% and fire clay 1%-2%, redispersible latex powder has adhesion strength extremely outstanding, it improves the flexibility of mortar and has the longer open hour, assign mortar excellent alkali resistance, improve the adhesive binder of mortar, flexural strength, waterproofness, plasticity, outside wear-resisting property and application property, stronger flexibility is had more in Flexible anti-crack mortar.
Description
Technical field
The present invention relates to technical field of coatings, in particular to a kind of dedicated lost foam paint of lost foam casting process and its systems
Make technique.
Background technique
Lost foam casting (also known as cavityless casting) is by paraffin similar with casting dimension shape or bubbles model bonding group
Synthetic model cluster is embedded in vibration molding in drystone sand, is poured under negative pressure, make model gas after brushing fireproof coating and drying
Change, liquid metals occupies modal position, the novel casting method of casting is formed after solidification is cooling, lost foam paint is casting process
In very important component part, coating products in the prior art are poor using being coated with property in use, often send out
It is raw to glue husky situation, it is not easily cleaned so as to cause cast(ing) surface, number of patent application 201510048762.3 discloses a kind of disappearance
Die cast coating, this coating intensity is low and fire resistance is poor, cannot meet the needs of users well, the present invention be directed to
Upper problem proposes a kind of new solution.
Summary of the invention
To be solved by this invention is that lost foam paint use intensity is low in the prior art, fire resistance is poor and frequent hair
The problems such as raw viscous husky, provides a kind of dedicated lost foam paint of lost foam casting process and its manufacture craft, in view of the above problems
Solve problem above.
The technical scheme to solve the above technical problems is that a kind of dedicated disappearance die coating of lost foam casting process
Material, including silica flour 80%-90% and bentonite 5%-8%, further include redispersible latex powder 1.5%-2.3%, environmental protection
Adhesive 1.5%-2.6%, graphite 1%-2%, mica powder 5%-8% and fire clay 1%-2%.
Redispersible latex powder has adhesion strength extremely outstanding, when improving the flexibility of mortar and having longer opening
Between, it assigns mortar excellent alkali resistance, improves the adhesive binder, flexural strength, waterproofness, plasticity, wearability of mortar
Stronger flexibility, the design of environment-friendly adhesive (environment-protective adhesive) can be had more in Flexible anti-crack mortar with outside application property
Pollution will not be generated to environment, there is good environment protecting, the design of graphite is so that coating itself has lubrication effect well
Fruit will not stick together with product；Mica powder has good toughness, and also has high temperature resistance, can be very good to mention
The fire resistance of high coating outside fire clay refractoriness with higher, is able to maintain the stability of volume under the high temperature conditions, and
With resistance to slag, to the repellence and certain mechanical strength of rapid heat cycle, therefore after calcining, exception is firm.
Based on the above technical solution, the present invention can also be improved as follows.
In any of the above-described scheme preferably, the redispersible latex powder is the copolymerization of ethylene and vinylacetate
Object.
In any of the above-described scheme preferably, the environment-friendly adhesive is water-based adhesive, solventless adhesive, day
One of right adhesive, natural glue or inorganic adhesive.
The second aspect of the invention is related to a kind of manufacture craft of dedicated lost foam paint of lost foam casting process, will be each
Component raw material mixes, comprising the following steps:
Step 1: prepare every raw material and agitating device；
Step 2: every raw material is put into agitating device and is mixed；
Step 3: the raw material after stirring is stored by cabinet.
In any of the above-described scheme preferably, the agitating device in the step 1 includes mixing drum, agitating shaft, stirring
Motor and stirring blade, stirring motor are mounted on mixing drum top, the motor shaft of agitating shaft and stirring motor by first support
It is connected, stirring blade is connected with agitating shaft.
In any of the above-described scheme preferably, the stirring blade is provided with multiple and is connected respectively with agitating shaft.
In any of the above-described scheme preferably, the mixing drum is internally provided with heating device.
In any of the above-described scheme preferably, it is provided with material spilling hole on the stirring blade, which is provided with more
A and difference is arranged on stirring blade at equal intervals.
In any of the above-described scheme preferably, the periphery of the stirring blade and material spilling hole is respectively set to zigzag.
In any of the above-described scheme preferably, the stirring blade includes long stirring sheet and short stirring sheet, long stirring sheet
With short stirring sheet be respectively arranged with it is multiple and respectively alternate be mounted on agitating shaft.
The beneficial effects of the present invention are: redispersible latex powder has adhesion strength extremely outstanding in the present invention, improve
The flexibility of mortar simultaneously has the longer open hour, assigns mortar excellent alkali resistance, improves adhesive binder, the anti-folding of mortar
Outside intensity, waterproofness, plasticity, wear-resisting property and application property, stronger flexibility, environmental protection are had more in Flexible anti-crack mortar
The design of adhesive (environment-protective adhesive) will not generate pollution to environment, have good environment protecting, the design of graphite so that
Coating itself has good lubricant effect, will not stick together with product；Mica powder has good toughness, and also has
High temperature resistance can be very good the fire resistance for improving coating, outside fire clay refractoriness with higher, in hot conditions
Under be able to maintain the stability of volume, and there is resistance to slag, repellence and certain mechanical strength to rapid heat cycle, therefore
It is abnormal firm after calcining, by add these types of raw material improve lost foam paint intensity and refractoriness it is high, being coated with property and
Shoulder viscous Sha Xinghao, cast(ing) surface easy to clean.
Detailed description of the invention
Fig. 1 is the knot of agitating device in the manufacture craft of the dedicated lost foam paint of lost foam casting process according to the invention
Structure schematic diagram；
Fig. 2 is the knot of long stirring sheet in the manufacture craft of the dedicated lost foam paint of lost foam casting process according to the invention
Structure schematic diagram；
In attached drawing, parts list represented by the reference numerals are as follows:
1, mixing drum, 2, agitating shaft, 3, stirring motor, 4, first support, 5, heating device, 6, material spilling hole, 7, long stirring
Piece, 8, short stirring sheet.
Specific embodiment
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the invention.
Embodiment 1: as shown in Figure 1 to Figure 2, a kind of dedicated lost foam paint of lost foam casting process, including silica flour
80%-90% and bentonite 5%-8% further includes redispersible latex powder 1.5%-2.3%, environment-friendly adhesive 1.5%-
2.6%, graphite 1%-2%, mica powder 5%-8% and fire clay 1%-2%, redispersible latex powder have extremely outstanding
Adhesion strength improves the flexibility of mortar and has the longer open hour, assigns mortar excellent alkali resistance, improves the adherency of mortar
Property adhesiveness, flexural strength, waterproofness, plasticity, wear-resisting property and application property outside, with more relatively strong in Flexible anti-crack mortar
Flexibility, the design of environment-friendly adhesive (environment-protective adhesive) will not generate pollution to environment, have good environment protecting, stone
The design of ink will not be sticked together with product so that coating itself has good lubricant effect；Mica powder has tough well
Property, and also there is high temperature resistance, it can be very good the fire resistance for improving coating, fire clay refractoriness with higher
Outside, it is able to maintain the stability of volume under the high temperature conditions, and there is resistance to slag, the repellence to rapid heat cycle, and certain
Mechanical strength, thus it is abnormal firm after calcining.
In order to preferably use redispersible latex powder, in further specific embodiment, the redispersible
Latex powder is the copolymer of ethylene and vinylacetate.
In further specific embodiment, the environment-friendly adhesive is water-based adhesive, solventless adhesive, natural
One of adhesive, natural glue or inorganic adhesive.
The second aspect of the invention is related to a kind of manufacture craft of dedicated lost foam paint of lost foam casting process, will be each
Component raw material mixes, comprising the following steps:
Step 1: prepare every raw material and agitating device；
Step 2: block stock is put into stirring and is stirred；
Step 3: the raw material after stirring is stored by cabinet.
In order to preferably use agitating device, plurality of raw materials is mixed by agitating device, further specific real
It applies in mode, the agitating device in the step 1 includes mixing drum 1, agitating shaft 2, stirring motor 3 and stirring blade, stirring electricity
Machine 3 is mounted on 1 top of mixing drum by first support 4, and agitating shaft 2 is connected with the motor shaft of stirring motor 3, stirring blade with stir
Axis 2 is mixed to be connected.
In order to improve the mixed effect of raw material, in further specific embodiment, the stirring blade is provided with multiple
And it is connected respectively with agitating shaft 2.
For temperature of the better control raw material in mixed process, in further specific embodiment, the stirring
Cylinder 1 is internally provided with heating device 5.
In order to preferably stirring blade be used to be provided with leakage on the stirring blade in further specific embodiment
Expect hole 6, which is provided with multiple and is arranged on stirring blade at equal intervals respectively, can be very good by material spilling hole
Every raw material is stirred and is mixed.
In order to preferably be stirred to every raw material, in any of the above-described scheme preferably, the stirring blade and material leakage
The periphery in hole 6 is respectively set to zigzag, and jagged design can be very good to be stirred raw material, increases various raw materials
Between contact area.
In order to be preferably stirred to raw material, stirring blade is stirred the raw material of different location, mentions
High mixing effect so that mixed between various raw materials it is more uniform, in further specific embodiment, the stirring blade packet
Long stirring sheet 7 and short stirring sheet 8 are included, long stirring sheet 7 and short stirring sheet 8 are respectively arranged with installation that is multiple and alternateing respectively
On agitating shaft 2.
Embodiment 2: a kind of dedicated lost foam paint of lost foam casting process, including 80 parts and 5 parts of bentonite of silica flour, also
Including 1.5 parts of redispersible latex powder, 1.5 parts of environment-friendly adhesive, 1 part of graphite, 5 parts of mica powder and 1 part of fire clay, first
Every raw material is put into mixing drum 1, agitating shaft is driven by stirring motor 3, agitating shaft 2 drives long stirring sheet 7 and short
Stirring sheet 8 rotates, and long stirring sheet 7 and 8 pairs of short stirring sheet every raw materials mix, and raw material passes through zigzag in whipping process
Tooth slot position and material leakage hole site increase the contact area between every raw material, finally obtain lost foam paint finished product,
Staff can select the mixing temperature of raw material according to the actual situation in whipping process, and heating device 5 is preferred in the present invention
Use electromagnetic heater.
Embodiment 3: a kind of dedicated lost foam paint of lost foam casting process, including 90 parts of silica flour, 8 parts of bentonite, can
2.3 parts of redispersibility latex powder, 2.6 parts of environment-friendly adhesive, 2 parts of graphite, 8 parts of mica powder and 2 parts of fire clay, first will be every
Raw material is put into mixing drum 1, is driven by stirring motor 3 to agitating shaft, agitating shaft 2 drives long stirring sheet 7 and short stirring sheet 8
Rotation, long stirring sheet 7 and 8 pairs of short stirring sheet every raw materials mix, and raw material passes through jagged tooth socket in whipping process
Position and material leakage hole site increase the contact area between every raw material, finally obtain lost foam paint finished product, are stirring
Staff can select the mixing temperature of raw material according to the actual situation in the process, and it is preferable to use electricity for heating device 5 in the present invention
Magnetic heating device is stored lost foam paint by cabinet or other tools after the completion of raw material stirring.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (10)
1. a kind of dedicated lost foam paint of lost foam casting process, including silica flour 80%-90% and bentonite 5%-8%,
Be characterized in that, further include redispersible latex powder 1.5%-2.3%, environment-friendly adhesive 1.5%-2.6%, graphite 1%-2%,
Mica powder 5%-8% and fire clay 1%-2%.
2. the dedicated lost foam paint of lost foam casting process according to claim 1 and its manufacture craft, which is characterized in that
The redispersible latex powder is the copolymer of ethylene and vinylacetate.
3. the dedicated lost foam paint of lost foam casting process according to claim 1 and its manufacture craft, which is characterized in that
Environment-friendly adhesive is one in water-based adhesive, solventless adhesive, natural glue, natural glue or inorganic adhesive
Kind.
4. the manufacture craft of the dedicated lost foam paint of a kind of lost foam casting process according to claim 1, by each component
Raw material mixes, comprising the following steps:
Step 1: prepare every raw material and agitating device；
Step 2: block stock is put into agitating device and is mixed；
Step 3: the raw material after stirring is stored by cabinet.
5. the dedicated lost foam paint of lost foam casting process according to claim 3 and its manufacture craft, which is characterized in that
Agitating device in the step 1 includes mixing drum (1), agitating shaft (2), stirring motor (3) and stirring blade, stirring motor
(3) it is mounted on mixing drum (1) top by first support (4), agitating shaft (2) is connected with the motor shaft of stirring motor (3), stirring
Blade is connected with agitating shaft (2).
6. the dedicated lost foam paint of lost foam casting process according to claim 5 and its manufacture craft, which is characterized in that
The stirring blade is provided with multiple and is connected respectively with agitating shaft (2).
7. the dedicated lost foam paint of lost foam casting process according to claim 5 and its manufacture craft, which is characterized in that
The mixing drum (1) is internally provided with heating device (5).
8. the dedicated lost foam paint of lost foam casting process according to claim 4 and its manufacture craft, which is characterized in that
Material spilling hole (6) are provided on the stirring blade, which is provided with multiple and is arranged at equal intervals in paddle respectively
On piece.
9. the dedicated lost foam paint of lost foam casting process according to claim 8 and its manufacture craft, which is characterized in that
The periphery of the stirring blade and material spilling hole (6) is respectively set to zigzag.
10. the dedicated lost foam paint of lost foam casting process according to claim 5 and its manufacture craft, feature exist
In the stirring blade includes long stirring sheet (11) and short stirring sheet (12), and long stirring sheet (11) and short stirring sheet (12) are respectively
It is provided with that multiple and what is alternateed respectively is mounted on agitating shaft (2).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811167299.4A CN109095935A (en) | 2018-10-08 | 2018-10-08 | A kind of dedicated lost foam paint of lost foam casting process and its manufacture craft |
| CN202111060287.3A CN113648878A (en) | 2018-10-08 | 2018-10-08 | Lost foam coating, manufacturing method thereof and stirring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811167299.4A CN109095935A (en) | 2018-10-08 | 2018-10-08 | A kind of dedicated lost foam paint of lost foam casting process and its manufacture craft |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111060287.3A Division CN113648878A (en) | 2018-10-08 | 2018-10-08 | Lost foam coating, manufacturing method thereof and stirring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109095935A true CN109095935A (en) | 2018-12-28 |
Family
ID=64868330
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811167299.4A Pending CN109095935A (en) | 2018-10-08 | 2018-10-08 | A kind of dedicated lost foam paint of lost foam casting process and its manufacture craft |
| CN202111060287.3A Pending CN113648878A (en) | 2018-10-08 | 2018-10-08 | Lost foam coating, manufacturing method thereof and stirring device |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111060287.3A Pending CN113648878A (en) | 2018-10-08 | 2018-10-08 | Lost foam coating, manufacturing method thereof and stirring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN109095935A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010142867A (en) * | 2008-12-22 | 2010-07-01 | Kao Corp | Coating agent composition for lost foam |
| CN102179473A (en) * | 2011-05-11 | 2011-09-14 | 李华山 | Lost foam casting composite coating |
| CN104624922A (en) * | 2015-01-29 | 2015-05-20 | 石家庄满鼎福铸造有限公司 | Lost foam casting coating for gray cast iron and preparation method of lost foam casting coating |
| CN205199385U (en) * | 2015-12-02 | 2016-05-04 | 重庆天奕恒化科技有限公司 | Chemical industry is with accuse temperature agitator |
| CN105728637A (en) * | 2014-12-09 | 2016-07-06 | 重庆市金升机械配件制造有限公司 | Novel coating used for evaporative pattern casting process |
| CN106861499A (en) * | 2016-11-09 | 2017-06-20 | 浙江罗尔环保科技有限公司 | A kind of water paint agitating device with multiple agitating function |
| CN107497992A (en) * | 2017-10-16 | 2017-12-22 | 湖南长高新材料股份有限公司 | Lost foam casting coating and preparation method thereof and application method |
-
2018
- 2018-10-08 CN CN201811167299.4A patent/CN109095935A/en active Pending
- 2018-10-08 CN CN202111060287.3A patent/CN113648878A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010142867A (en) * | 2008-12-22 | 2010-07-01 | Kao Corp | Coating agent composition for lost foam |
| CN102179473A (en) * | 2011-05-11 | 2011-09-14 | 李华山 | Lost foam casting composite coating |
| CN105728637A (en) * | 2014-12-09 | 2016-07-06 | 重庆市金升机械配件制造有限公司 | Novel coating used for evaporative pattern casting process |
| CN104624922A (en) * | 2015-01-29 | 2015-05-20 | 石家庄满鼎福铸造有限公司 | Lost foam casting coating for gray cast iron and preparation method of lost foam casting coating |
| CN205199385U (en) * | 2015-12-02 | 2016-05-04 | 重庆天奕恒化科技有限公司 | Chemical industry is with accuse temperature agitator |
| CN106861499A (en) * | 2016-11-09 | 2017-06-20 | 浙江罗尔环保科技有限公司 | A kind of water paint agitating device with multiple agitating function |
| CN107497992A (en) * | 2017-10-16 | 2017-12-22 | 湖南长高新材料股份有限公司 | Lost foam casting coating and preparation method thereof and application method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113648878A (en) | 2021-11-16 |
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Application publication date: 20181228 |
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