CN107073560B - Evaporative pattern coat composition - Google Patents
Evaporative pattern coat composition Download PDFInfo
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- CN107073560B CN107073560B CN201580059794.1A CN201580059794A CN107073560B CN 107073560 B CN107073560 B CN 107073560B CN 201580059794 A CN201580059794 A CN 201580059794A CN 107073560 B CN107073560 B CN 107073560B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The present invention provides a kind of manufacturing method of the casting evaporative pattern of the evaporative pattern containing refractory aggregate and amorphous cellulose with coat composition and around evaporative pattern with film, and the manufacturing method of casting evaporative pattern has the process for being attached to above-mentioned evaporative pattern around above-mentioned evaporative pattern with coat composition and forming film.According to the present invention, it is possible to provide a kind of safety is higher and can further suppress the evaporative pattern of the residue defect manufacturing method of coat composition and mold.
Description
Technical field
The present invention relates to a kind of evaporative pattern being attached to around evaporative pattern coat compositions.
Background technique
Casting method with the vanishing pattern is to make with the synthetic resin of product same shape foaming body Model and molten metal (below also referred to as
Make " molten metal (molten soup) ") casting of displacement, type core is not needed, the loaded down with trivial details operations such as molding is not needed, sets because having
The advantages of Numerous such as meter change is easy, delivery date is short, so being the casting to attract attention in recent years.In the casting by
Synthetic resin foaming body is thermally decomposed in the molten metal using casting, therefore is existed because of generated a large amount of thermal decomposition gas
And residue and in casting generate residue defect the shortcomings that.Especially polystyrene is being used as synthetic resin foaming body
In the case where, cast(ing) surface can be made to deteriorate because of carbonization component.
In the casting method with the vanishing pattern, evaporative pattern is in order to prevent by synthesizing tree with coat (COATING AGENT)
" residue defect " and molten metal caused by the thermal decomposition of rouge foaming body Model destroys film and leaks out into sand mold
" scab defect " and use.
Residue defect is to thermally decompose the discharge of gas not when replacing synthetic resin foaming body Model and molten metal
In sufficient situation, the phenomenon that becoming thermal decomposition residues and be involved in product top.It is somebody's turn to do " residue defect " in order to prevent, it is desirable that will close
It is efficiently discharged to mold side at the thermal decomposition gas of resin expanded body Model.For " scab defect ", it is desirable that in molten metal
Solidification terminate before in a period of, remain continuously firm film.
As existing evaporative pattern coat composition, for example, being disclosed in No. 3180244 bulletins of Japanese Unexamined Patent Publication
: use the composition of nitrocellulose that is not soluble in water and dissolving in hydrophily organic solvent.The evaporative pattern coat
Composition, which is selected in water-hydrophily organic solvent system, occurs the microdispersed substance of gonorrhoea precipitation, and nitrocellulose is made to exist
The composition that gonorrhoea is precipitated micro disperse and reduces residue defect occurs in masking liquid microly.In addition, in Japanese Unexamined Patent Publication 2001-1104
The coat composition that residue defect is reduced containing organic plastochondria object is described in number bulletin.
Summary of the invention
Evaporative pattern coat composition of the invention contains refractory aggregate and amorphous cellulose.
Detailed description of the invention
Fig. 1 is the skeleton diagram of the evaporative pattern used in the evaluation of embodiment.
Specific embodiment
For existing evaporative pattern coat composition, residue defect is prevented from being not enough, it is desirable into
One step improves.In addition, evaporative pattern described in Japanese Unexamined Patent Publication 3-180244 bulletin is in coat composition, due to using
Nitrocellulose, therefore there are problematic in terms of safety.
The present invention provides one kind evaporative pattern that is highly-safe and can further suppressing residue defect and is combined with coat
Object.
Evaporative pattern coat composition of the invention contains refractory aggregate and amorphous cellulose.
According to the present invention, it is possible to provide a kind of safety is higher and can further suppress the evaporative pattern smearing of residue defect
Agent composition.
Hereinafter, being illustrated to one embodiment of the present invention.
<evaporative pattern coat composition>
The evaporative pattern of present embodiment is with coat composition (hereinafter, being also referred to simply as " coat composition ") containing resistance to
Fiery aggregate and amorphous cellulose.The coat composition of evaporative pattern according to the present embodiment, play safety it is higher and
Effect as residue defect can be further suppressed.The reason of playing such effect is simultaneously indefinite, but is contemplated that as follows.
, it can be said that residue defect in order to prevent, it is important that before casting terminates, the efficiently discharge synthesis from film
The thermal decomposition gas of resin expanded body Model.In the coat composition of present embodiment, due in the resistance to of coat composition
Contain amorphous cellulose in fiery aggregate, therefore the amorphous cellulose is dispersedly present in film.The amorphous cellulose
It can burn disappearances due to heat when casting, therefore the amorphous cellulose is once existing partially just becomes gap.Due to the sky
Gap becomes stomata, the thermal decomposition gas of synthetic resin foaming body can be made efficiently to be discharged, therefore can reduce residue defect.
Hereinafter, evaporative pattern ingredient contained by coat composition to present embodiment is illustrated.
[refractory aggregate]
The coat composition of present embodiment contains refractory aggregate.The refractory aggregate can be used in the past according to casting
Purpose and the refractory aggregate being used.As the example of refractory aggregate, mica, obsidian, perlite, rosin can be enumerated
(its English is the thick bauxite of rock, orthoclase, albite, leucite, nepheline, silica, aluminium oxide, mullite, shaft furnace
" Shaft Kiln Aluminous shale " or " Shaft Kiln Raw Bauxite "), diaspore, spinelle, magnesia,
Olivine, talcum, zircon, kaolin, sillimanite, andalusite, kyanite, gibbsite, black sand stone, dickite, grey feldspar, stone
Ink, bauxite is burnt into obtained by material etc..The refractory aggregate can with it is above-mentioned it is one kind or two or more be subject to using.
For the average grain diameter of the refractory aggregate, from the viewpoint of preventing residue defect, preferably 20 μm or more, more
Preferably 40 μm or more, further preferably 50 μm or more.In addition, for the average grain diameter of refractory aggregate, from preventing scab to lack
Fall into from the viewpoint of, preferably 400 μm hereinafter, more preferably 200 μm hereinafter, further preferably 150 μm or less.In addition, resistance to
The average grain diameter of fiery aggregate is preferably 20~400 μm, more preferably 40~200 μm, further preferably 50~150 μm.It needs
Illustrate, the average grain diameter of the refractory aggregate is measured using the method recorded in embodiment.
For the content of the refractory aggregate of the coat composition of present embodiment, from drying property, the films such as crackle are prevented
From the viewpoint of defect, preferably 30 mass % or more, more preferably 40 mass % or more.For the coat of present embodiment
The content of the refractory aggregate of composition, from the viewpoint of painting work, preferably 80 mass % are hereinafter, more preferably 70 matter
Measure % or less.In addition, the content of the refractory aggregate of the coat composition of present embodiment is preferably 30~80 mass %, it is more excellent
It is selected as 40~70 mass %.
[amorphous cellulose]
Above-mentioned amorphous cellulose is as molecular formula (C6H10O5) carbohydrate (polysaccharide) represented by n, it is fine
The crystal structure of element is tieed up through decrystallized cellulose.
In the present specification, so-called amorphous cellulose refers to that crystallinity is 33% cellulose below.
In the present specification, the crystallinity of cellulose is using Segal method by strong using the resulting diffraction of X-ray diffraction method
The cellulose I type crystallinity that angle value is calculated is defined by following calculating formulas (A).
Cellulose I type crystallinity (%)=[(I22.6-I18.5)/I22.6]×100 (A)
[in formula, I22.6Indicate the diffracted intensity of the lattice plane (002 face) (2 θ=22.6 ° of the angle of diffraction) of X-ray diffraction, I18.5
Indicate the diffracted intensity of amorphous portion (2 θ=18.5 ° of the angle of diffraction)]
Herein, shown in for example above-mentioned calculating formula (A) of cellulose I type crystallinity, the angle of diffraction of X-ray diffraction pattern is used
The peak strength I of 22.6 ° (and indicate crystalline 002 face corresponding peak) and 18.5 ° (peak corresponding with amorphous portion).If in the presence of
Decrystallized propulsion then becomes I22.6< I18.5Situation (that is, if being calculated using this definition, become negative value), another party
Face, the upper limit of cellulose I type crystallinity are 100%.It should be noted that so-called cellulose I type refers to the knot of native cellulose
Crystalline form.
For the viewpoint that may refrain from residue defect, above-mentioned crystallinity be preferably 30% hereinafter, more preferably 25% hereinafter, into
One step is preferably 20% or less.For the viewpoint of amorphisation cost, above-mentioned crystallinity is preferably -30% or more, more excellent
It is selected as -20% or more, further preferably -10% or more.In addition, above-mentioned crystallinity is preferably -30%~30%, more preferably
It is -20%~25%, further preferably -10%~20%.
The different cellulose combination of two or more above-mentioned crystallinity can also be used, the crystallinity of cellulose in this case
Refer to the crystallinity according to calculated by the weighted average of used cellulose, the preferably value is in above range.
In order to be capable of forming stomata after the cellulose burning disappearance being dispersed in film, it is necessary to the gas blanket in casting
At a temperature of burn at 250~400 DEG C and disappear, and until there are stomatas until casting completion.It is therefore preferable that for 250
Residual carbon or the less amorphous cellulose of ash content after decomposing and decompose at~400 DEG C.
The shape of above-mentioned amorphous cellulose is not particularly limited, and threadiness or granular amorphous cellulose can be used,
It is preferably granular but for the viewpoint of coating operations.
In the case where the shape of above-mentioned amorphous cellulose is granular, for reducing the viewpoint of residue defect, this is non-
The average grain diameter of crystallization cellulose is preferably 50 μm or more, and more preferably 80 μm or more.In addition, just reducing the viewpoint of scab defect
For, the average grain diameter of the amorphous cellulose is preferably 500 μm hereinafter, more preferably 200 μm or less.In addition, this is decrystallized
The average grain diameter of cellulose is preferably 50~500 μm, and more preferably 80~200 μm.It should be noted that in the present specification,
Average grain diameter is measured by method documented by embodiment.
It, should for reducing the viewpoint of residue defect in the case where the shape of above-mentioned amorphous cellulose is threadiness
The fibre length of amorphous cellulose is preferably 50 μm or more, more preferably 80 μm or more, further preferably 120 μm or more.
In addition, the fibre length of the amorphous cellulose is preferably 600 μm hereinafter, more preferably for the viewpoint for reducing scab defect
It is 300 μm or less.In addition, the fibre length of the amorphous cellulose is preferably 50~600 μm, more preferably 80~300 μm, into
One step is preferably 120~300 μm.
It, should for reducing the viewpoint of residue defect in the case where the shape of above-mentioned amorphous cellulose is threadiness
The fiber footpath of amorphous cellulose is preferably 10 μm or more, and more preferably 20 μm or more.In addition, just to synthesis foamed resin mould
For the viewpoint of the coating of type, the fiber footpath of the amorphous cellulose is preferably 80 μm or less.In addition, the amorphous cellulose
Fiber footpath be preferably 10~80 μm, more preferably 20~80 μm.
For reducing the viewpoint of residue defect, that is, for ensuring the viewpoint as the gap of stomata, present embodiment
The content of amorphous cellulose of coat composition relative to 100 mass parts of refractory aggregate be preferably 1 mass parts or more, more
More than preferably 3 mass parts, more than further preferably 4 mass parts.In addition, with regard to scab defect (coating strength when heating)
For viewpoint, the content of the amorphous cellulose of the coat composition of present embodiment is relative to 100 mass parts of refractory aggregate
Preferably 12 below the mass, and more preferably 10 below the mass, and further preferably 7 below the mass.In addition, this embodiment party
The content of the amorphous cellulose of the coat composition of formula is preferably 1~12 mass parts relative to 100 mass parts of refractory aggregate,
More preferably 3~10 mass parts, further preferably 4~7 mass parts.
The manufacturing method of above-mentioned amorphous cellulose is not particularly limited, such as can pass through Japanese Unexamined Patent Application 62-126999
Number bulletin, Japanese Unexamined Patent Application 62-127000 bulletin, Japanese Unexamined Patent Application 62-236801 bulletin, Japanese Unexamined Patent Publication 2003-64184
Number bulletin, Japanese Unexamined Patent Publication 2004-331918 bulletin, No. 4160108 bulletins of Japanese Patent No., Japanese Patent No. 4160109
Each methods recorded in the literature such as bulletin, Japanese Unexamined Patent Publication 2011-1547 bulletin and obtain.
[decentralized medium]
In the casting method with the vanishing pattern of present embodiment, heat when by by casting makes the amorphous cellulose burning disappear
Gap after mistake as stomata, if therefore using the decentralized medium for making decrystallized cellulose dissolution, be difficult to be formed into the gas
The gap in hole.Therefore, which is preferably the decentralized medium for not dissolving the amorphous cellulose.
As the decentralized medium, alcohols, water etc. can be used for example.
In the case where alcohol system coat composition, from the viewpoint of drying property, preferably methanol, ethyl alcohol, isopropanol etc.
Lower alcohols, more preferable ethyl alcohol.In the case where alcohol system coat composition, it can also be used as aid dispersion medium and use virtue
Fragrant family solvent, hydrocarbon system solvent.
The amount of decentralized medium in alcohol system coat composition can suitably become according to the type of decentralized medium used
More.As an example, in the case where the decentralized medium is lower alcohol, from the viewpoint of painting work, relative to fire resisting bone
100 mass parts are expected, more than preferably 20 mass parts, more than more preferably 70 mass parts.For in alcohol system coat composition
The amount of decentralized medium, in the case where lower alcohol, from drying property, prevent the paint film defects such as crackle from the viewpoint of, relative to resistance to
Fiery 100 mass parts of aggregate, preferably 120 below the mass, and more preferably 110 below the mass.In addition, for alcohol system coat
The amount of decentralized medium in composition, if it is lower alcohol, then from painting work and from the viewpoint of forming sound film,
Relative to 100 mass parts of refractory aggregate, preferably 20~120 mass parts, more preferably 70~110 mass parts.
In the case where water system coat composition, for the amount of the water in water system coat composition, from painting work
From the viewpoint of property, relative to 100 mass parts of refractory aggregate, more than preferably 20 mass parts, more than more preferably 70 mass parts.
In the case where water system coat composition, for the amount of the water in water system coat composition, from the viewpoint of drying property,
Relative to 100 mass parts of refractory aggregate, preferably 150 below the mass, and more preferably 130 below the mass.In addition, in water system
In the case where coat composition, for the amount of the water in water system coat composition, from the sight of painting work and drying property
Point considers, relative to 100 mass parts of refractory aggregate, preferably 20~150 mass parts, more preferably 70~130 mass parts.
[binder]
In the coat composition of present embodiment, the binder as can also be contained.As this
Binder, for example, can be used for water system Sodium Polyacrylate, starch, methylcellulose, polyvinyl alcohol, mosanom, I
The water soluble polymers such as primary glue or various resin emulsions.In addition, from the aspect of coating strength, preferably adding for alcohol system
Add the various resins for dissolving in or being scattered in alcohol.For the content of binder, from the viewpoint of coating strength and economy,
Relative to 100 mass parts of refractory aggregate, more than preferably 0.5 mass parts, preferably 30 below the mass.In addition, for bonding
The content of agent, from the viewpoint of coating strength and economy, relative to 100 mass parts of refractory aggregate, preferably 0.5~30 matter
Measure part.
[agglutinant]
In the coat composition of present embodiment, the agglutinant as can also be contained.As this
Agglutinant, such as clays class, the silester etc. such as can enumerate the bentonites such as sodium bentonite, calcium-base bentonite, kibushi clay.Its
In, bentonite also plays the role of in high-temperature area as agglutinant other than the effect as binder, therefore excellent
Choosing.It is excellent relative to 100 mass parts of refractory aggregate from the viewpoint of coating strength when from high temperature for the additive amount of agglutinant
It is selected as 0.5 mass parts or more, more than more preferably 1.0 mass parts.Painting in addition, for the additive amount of agglutinant, when from high temperature
From the viewpoint of film-strength, relative to 100 mass parts of refractory aggregate, preferably 30 below the mass, more preferably 15 mass parts
Below.In addition, for the additive amount of agglutinant, from the viewpoint of coating strength when from high temperature, relative to 100 matter of refractory aggregate
Measure part, preferably 0.5~30 mass parts, more preferably 1.0~15 mass parts.
[other compositions]
As other ingredients in the coat composition that can be cooperated to present embodiment, surface-active can be enumerated
Agent, dispersing agent, thixotropy conferring agents etc..
The coat composition of present embodiment can be used as the coat composition being attached to around evaporative pattern
Ground uses.
<manufacturing method of casting evaporative pattern>
In the manufacturing method of the casting evaporative pattern of present embodiment, the manufacture of existing casting evaporative pattern can be applied
Method.The manufacturing method of the casting of present embodiment evaporative pattern is the casting evaporative pattern around evaporative pattern with film
Manufacturing method, have so that the evaporative pattern is attached to around the evaporative pattern with coat composition and is formed film
Process.
The evaporative pattern of coat composition as attachment present embodiment can be used and usual identical synthetic resin
The model of foaming body.As synthetic resin foaming body, can be used polystyrene, polymethyl methacrylate or they be total to
The foaming bodies such as polymers.It, can in the case where adhering to the evaporative pattern of coat composition of present embodiment is expanded polystyrene (EPS)
Further to obtain the effect of the coat composition of present embodiment.Coat composition is set to be attached to evaporative pattern and form painting
The method of film can be the previously known methods such as flow coat (casting (Block Star カ ケ method)), dipping (dip coating), brushing, spraying
In any one.
Casting evaporative pattern can be well obtained from the manufacturing method of the casting evaporative pattern of present embodiment
In manufacturing method for the mold based on casting method with the vanishing pattern.
<manufacturing method of casting>
In the manufacturing method of the casting of the casting method with the vanishing pattern based on present embodiment, it can disappear using based on existing
The manufacturing method of the casting of lost pattern casting method.The manufacturing method of the casting of present embodiment is disappeared using by the casting
The manufacturing method of the casting of casting evaporative pattern obtained from the manufacturing method of mould has and buries the casting with evaporative pattern
Process in molding sand and to the process for being embedded in molten metal of casting in the casting evaporative pattern in the molding sand.
As by the casting with evaporative pattern be embedded in the process in molding sand used in molding sand, in addition to can be used with stone
Other than English matter is as the silica sand of principal component, fresh sands or the reclaimed sands such as zircon sand, chromium sand, synthesis ceramic sand can also be used.Molding sand
Adhesive floor use can not be added, fillibility is good in this case, however in the case where requiring high-intensitive mold, it is excellent
Known adhesive is added in choosing, and is allowed to solidify using curing agent.
The manufacturing method of the casting of present embodiment in the case where addition described adhesive is using by the casting
The manufacturing method of the casting of casting evaporative pattern obtained from manufacturing method with evaporative pattern has and is added into the molding sand
Adhesive and the curing agent for making the adhesive curing, make its be kneaded and the process for preparing mixture；By the casting evaporative pattern
The process being embedded in the mixture；And it is melted to being embedded in cast in the casting evaporative pattern in the mixture
The process of metal.
As described adhesive, the adhesive as can be used.As the adhesive, such as with regard to water system
For the water soluble polymers such as Sodium Polyacrylate, starch, methylcellulose, polyvinyl alcohol, mosanom, Arabic gum can be used
Or various resin emulsions.In addition, from the aspect of mold strength, preferably addition dissolves in or is scattered in alcohol for alcohol system
In various resins.For the content of the adhesive, from the viewpoint of mold strength and economy, relative to 100 matter of molding sand
Part is measured, more than preferably 0.4 mass parts, more than more preferably 0.5 mass parts.In addition, for the content of the adhesive, from mold
From the viewpoint of intensity and economy, relative to 100 mass parts of molding sand, preferably 1.2 below the mass, more preferably 0.8 matter
Measure part or less.In addition, for the content of the adhesive, from the viewpoint of mold strength and economy, relative to 100 matter of molding sand
Measure part, preferably 0.4~1.2 mass parts, more preferably 0.5~0.8 mass parts.
In the manufacturing method of the casting of present embodiment, cast temperature is different according to used metal, however
It is generally 1330~1410 DEG C in the case where cast iron system, 700~750 DEG C are generally in the case where aluminium system, in the feelings of cast steel system
1450~1500 DEG C are generally under condition.The casting method with the vanishing pattern of present embodiment can be further reduced in cast iron system therein and produce
Raw residue defect.
If manufacturing casting with coat composition using the evaporative pattern, residue defect and scab defect are few, can
To obtain the casting of cast(ing) surface beauty, it is consequently adapted to require complicated structure, the casting of surface aesthetics of cast(ing) surface etc..
As the example of specific casting, can enumerate automobile die, lathe, the oil pressure valve of building machinery, engine, engine rack,
Component used in building element etc., component etc..
About above embodiment, the present invention further discloses composition, manufacturing method or purposes below.
<1>a kind of evaporative pattern coat composition contains refractory aggregate and amorphous cellulose.
<2>the evaporative pattern coat composition as documented by above-mentioned<1>, wherein the average grain diameter of above-mentioned refractory aggregate
Preferably 20 μm or more, more preferably 40 μm or more, further preferably 50 μm or more, preferably 400 μm are hereinafter, more preferably
200 μm hereinafter, further preferably 150 μm hereinafter, preferably 20~400 μm, more preferably 40~200 μm, further preferably
It is 50~150 μm.
<3>the evaporative pattern coat composition as documented by above-mentioned<1>or<2>, wherein the content of above-mentioned refractory aggregate
Preferably 30 mass % or more, more preferably 40 mass % or more, preferably 80 mass % hereinafter, more preferably 70 mass % with
Under, preferably 30~80 mass %, more preferably 40~70 mass %.
<4>the evaporative pattern coat composition as documented by any one of above-mentioned<1>to<3>, wherein above-mentioned decrystallized
The crystallinity of cellulose be preferably 30% hereinafter, more preferably 25% hereinafter, further preferably 20% hereinafter, preferably-
30% or more, more preferably -20% or more, further preferably -10% or more, preferably -30%~30%, more preferably -
20%~25%, further preferably -10%~20%.
<5>the evaporative pattern coat composition as documented by any one of above-mentioned<1>to<4>, wherein above-mentioned decrystallized
Cellulose is preferably fibrous and/or granular, more preferably granular.
<6>the evaporative pattern coat composition as documented by above-mentioned<5>, wherein above-mentioned amorphous cellulose is averaged
Partial size is preferably 50 μm or more, more preferably 80 μm or more, preferably 500 μm hereinafter, more preferably 200 μm hereinafter, preferably
50~500 μm, more preferably 80~200 μm.
<7>the evaporative pattern coat composition as documented by above-mentioned<5>, wherein the fiber of above-mentioned amorphous cellulose
Length is preferably 50 μm or more, and more preferably 80 μm or more, further preferably 120 μm or more, preferably 600 μm hereinafter, more
Preferably 300 μm hereinafter, preferably 50~600 μm, more preferably 80~300 μm, further preferably 120~300 μm.
<8>the evaporative pattern coat composition as documented by above-mentioned<5>or<7>, wherein above-mentioned amorphous cellulose
Fiber footpath is preferably 10 μm or more, and more preferably 20 μm or more, preferably 80 μm are hereinafter, preferably 10~80 μm, more preferably
20~80 μm.
<9>the evaporative pattern coat composition as documented by any one of above-mentioned<1>to<8>, wherein above-mentioned decrystallized
The content of cellulose is preferably 1 mass parts or more relative to above-mentioned 100 mass parts of refractory aggregate, and it is more than more preferably 3 mass parts,
More than further preferably 4 mass parts, preferably 12 below the mass, and more preferably 10 below the mass, and further preferably 7
Below the mass, preferably 1~12 mass parts, more preferably 3~10 mass parts, further preferably 4~7 mass parts.
<10>the evaporative pattern coat composition as documented by any one of above-mentioned<1>to<9>, also contains dispersion
Agent, and above-mentioned dispersing agent does not make above-mentioned decrystallized cellulose dissolution.
<11>the evaporative pattern coat composition as documented by above-mentioned<10>, wherein above-mentioned decentralized medium is preferably low
Grade alcohol, more preferably ethyl alcohol.
<12>the evaporative pattern coat composition as documented by above-mentioned<11>, wherein the content phase of above-mentioned decentralized medium
It is preferably 20 mass parts or more for 100 mass parts of refractory aggregate, it is more than more preferably 70 mass parts, preferably 120 mass parts
Hereinafter, more preferably 110 below the mass, preferably 20~120 mass parts, more preferably 70~110 mass parts.
<13>the evaporative pattern coat composition as documented by above-mentioned<10>, wherein above-mentioned decentralized medium is preferably water.
<14>the evaporative pattern coat composition as documented by above-mentioned<13>, wherein above-mentioned decentralized medium is relative to resistance to
Fiery 100 mass parts of aggregate, more than preferably 20 mass parts, more than more preferably 70 mass parts, preferably 150 below the mass,
More preferably 130 below the mass, preferably 20~150 mass parts, more preferably 70~130 mass parts.
<15>the evaporative pattern coat composition as documented by any one of above-mentioned<1>to<14>, also contains bonding
Agent, and the content of the binder is relative to 100 mass parts of refractory aggregate, it is more than preferably 0.5 mass parts, preferably 30 mass parts
Hereinafter, preferably 0.5~30 mass parts.
<16>the evaporative pattern coat composition as documented by any one of above-mentioned<1>to<15>, also contains sintering
Agent, and the additive amount of agglutinant is relative to 100 mass parts of refractory aggregate, it is more than preferably 0.5 mass parts, more preferably 1.0 matter
Part or more is measured, preferably 30 below the mass, and more preferably 15 below the mass, preferably 0.5~30 mass parts, more preferably
1.0~15 mass parts.
<17>the evaporative pattern coat composition as documented by above-mentioned<16>, wherein above-mentioned agglutinant is preferably that calcium is swollen
Profit soil.
<18>a kind of manufacturing method of casting evaporative pattern is that the casting around evaporative pattern with film disappears
The manufacturing method of mould, having is attached to evaporative pattern documented by any one of above-mentioned<1>to<17>with coat composition
The process for forming film around above-mentioned evaporative pattern.
<19>manufacturing method of the casting evaporative pattern as documented by above-mentioned<18>, wherein above-mentioned evaporative pattern is preferably sent out
Foamed polystyrene.
<20>a kind of manufacturing method of casting is using the manufacturing method of the casting of casting evaporative pattern, the casting
It is made, is included by the manufacturing method of casting evaporative pattern documented by above-mentioned<18>or<19>with evaporative pattern
The process above-mentioned casting being embedded in evaporative pattern in molding sand；And to the above-mentioned casting being embedded in above-mentioned molding sand
With the process of evaporative pattern casting molten metal.
<21>a kind of manufacturing method of casting is using the manufacturing method of the casting of casting evaporative pattern, the casting
It is made, is included by the manufacturing method of documented casting evaporative pattern in above-mentioned<18>or<19>with evaporative pattern
Binder is added in molding sand and makes the cured curing agent of the binder, and is kneaded and is prepared the work of mixture
Sequence；The process above-mentioned casting being embedded in evaporative pattern in said mixture；And it is above-mentioned in said mixture to being embedded in
The process of casting evaporative pattern casting molten metal.
<22>evaporative pattern documented by any one of above-mentioned<1>to<17>uses coat composition as the painting of evaporative pattern
The purposes of mould agent.
Embodiment
Hereinafter, to specifically indicating that the embodiment of the present invention etc. is illustrated.
<evaluation method>
[cellulose I type crystallinity]
Cellulose I type crystallinity is trade name " the Rigaku RINT 2500VC X- manufactured using Co., Ltd. RIGAKU
RAY diffractometer " measures the X-ray diffraction intensity of sample under the following conditions, and is calculated based on above-mentioned calculating formula
's.It should be noted that test sample is to area 320mm2The particle of × thickness 1mm is compressed and manufactured.
X-ray source: Cu/K alpha radiation
Tube voltage: 40kv tube current: 120mA
Measurement range: 2 θ=5~45 ° scanning speed of the angle of diffraction: 10 °/min
[TG decomposes initial temperature]
" TG-8110 " manufactured using Co., Ltd. RIGAKU, in oxidation aluminum dish Φ 5mm × 2.5H, air-flow 500ml/
It is measured under conditions of 5 DEG C min, heating rate/min.It is set as the temperature at the time point that the reduction of TG starts to decompose starting
Temperature.
<average grain diameter>
Average grain diameter is the body measured using laser diffraction formula particle size distribution device (hole field makes made LA-920)
The average grain diameter of accumulation product 50%.Analysis condition is as described below.
Measuring method: flow method
Decentralized medium: ion exchange water
Dispersing method: stirring, built-in ultrasonic wave 3 minutes
Sample solution concentration: 2mg/100cc
[evaluation method of residue defect]
The evaporative pattern 1 of shape shown in FIG. 1 is produced using expanded polystyrene (EPS) (50 times of expansion ratio).Make aftermentioned painting
Mould agent composition is attached to around the evaporative pattern (dry film thickness: 1.4mm), produces casting evaporative pattern.Then, to
Organic sulfonic acid curing agent (flower the king Quaker system, C- of 0.2 mass parts are added in FREMANTLE silica sand (No. 5) 100 mass parts
14) after, they are kneaded, furane resins (the flower king Quaker of 0.5 mass parts is mixed relative to 100 mass parts of silica sand
System, EF-5302).Bury the casting evaporative pattern in resulting mixing sand, with the speed that overflows molten metal from
Ingate is cast (cast iron: FC-250, cast temperature: 1400 DEG C), after 24 hours, is dismantled mold and is taken out casting.
For resulting casting, the residue face caused by the 400 × 100 of the side TP 2 sides is measured using image analysis
Product (%).
[evaluation method of 400 DEG C of air permeabilities]
Coat shown in following table 1, using the baking oven for being positively retained at 400 DEG C ± 10 DEG C, is made after completing test film
It heats 30 minutes and is cooled to room temperature, according to " the dispellable mould casting coat of Japan Foundry engineering meeting Northwest branch distribution
Test method (Heisei in March, 8) (lost pattern cast, which is made, tries test method (Heisei in March, 8) with painting type drug) " " 5. is ventilative
Spend test method " and carried out the measurement of air permeability.In addition, " 400 DEG C of air permeabilities change (6/60min ratio) " is that utilization can be kept
In 400 DEG C ± 10 DEG C of baking oven, after measuring 6 minutes respectively with air permeability after sixty minutes, and with after 6 minutes/after sixty minutes ×
100 and calculate.That is, for indicate heating initial stage gas permeability index, and be worth more it is big then indicate heating initial stage gas permeability more
It is high.
[65% viscosity of solid component]
For coat shown in following table 1, ion exchange water is added, being adjusted to solid component is 65%.Thereafter, it utilizes
Rheometer (condition: parallel cone (one Application of パ ラ レ Le U), 20 DEG C, gap 1mm) and measure in shear velocity 10s-1Under conditions of
Viscosity (mPas) of the experience after 60 seconds.
[1000 DEG C of coating strengths]
For coat shown in table 1, according to " the dispellable mould casting smearing of Japan Foundry engineering meeting Northwest branch distribution
The test method (Heisei in March, 8) of agent " " 6. bending resistance amylograph ", carried out the measurement of coating strength.It needs to illustrate
It is for 1000 DEG C of heat treatment, in order to be set as non-oxidizing environment, and to fill average grain diameter in the crucible of Φ 50
60 μm of flaky graphite buries test film inside it.Then, in the Muffle furnace that can remain 1000 DEG C ± 30 DEG C,
Heating was cooled to room temperature after 1 hour, was determined.It should be noted that in addition to heating process, according to " 6. resistances to bending are surveyed
Determine method " it is determined.
<manufacture of amorphous cellulose>
As the raw material containing cellulose, sheet wood pulp (" HV-10 " of the manufacture of Tembec company) is put into sheet material and is granulated
Machine (Co., Ltd. HORAI manufacture " SG (E) -220 ") is cut.Using shelf dryer, (ADVANTEC company is manufactured, vacuum
Freeze-day with constant temperature machine " DRV320DA ") paper pulp obtained is dried in such a way that the paper pulp after drying becomes 1.0 mass %.
It will be put into batch vibrating ball-mill (central chemical industry machine Co., Ltd. manufactures, " MB-1 ") by being dried paper pulp obtained, adjusted
The whole processing time and produce the different spherical sample of crystallinity.The sample is sieved, obtaining has average grain documented by table 1
The amorphous cellulose of diameter.In addition, crystallinity 17% carries out processing in 10 minutes, crystallinity 4% carries out processing in 20 minutes, knot
Brilliant degree -15% carries out processing in 30 minutes.It is adjusted about granularity, with 28 mesh (589 μm of mesh) sieve, takes screening object.
About coarse content, for 300 μm, object is taken further to use the sieving of 100 mesh sieve and take its sieve residue to above-mentioned.For
For 800 μm, the sieve residue of 28 mesh is taken.
<preparation of coat composition>
[Examples 1 to 9 and Comparative Examples 1 and 2]
Relative to refractory aggregate (silica (80 μm of 60 mass %, average grain diameter), obsidian (20 mass %, average grain
93 μm of diameter), graphite (79 μm of 20 mass %, average grain diameter)) 100 mass parts, add table 1 shown in amount additive, and with it is non-
Ionic surfactant (Kao Corp's manufacture, EMULGEN 106) 3.0 mass parts, are gathered at 2.0 mass parts of calcium bentonite
2.0 mass parts of vinyl alcohol and the mixing of 40 mass parts of ion exchange water, to prepare coat composition.Documented by table 1
The unit of additive amount is mass parts.It should be noted that the concentration of coat is determined by following operation.
[the determination method of the concentration of coat]
The expanded polystyrene (EPS) mould of 300 × 150 (mm) is configured using the face of 30 ° of the elevation angle, 150mm as top, carries out 1
Secondary half round-trip showering.At 50 DEG C after drying 1 hour, 2 times are carried out with identical operation and is coated with and makes it dry.Film is complete
Site preparation removing, at vernier caliper measurement 4 so that its average value become the mode of the range of 1.4mm ± 0.1 adjusting water and
Determine concentration.
[table 1]
Claims (9)
1. a kind of evaporative pattern coat composition, containing refractory aggregate and amorphous cellulose, the amorphous cellulose
Crystallinity be 33% hereinafter,
The crystallinity of the amorphous cellulose for using Segal method by utilize the resulting diffracted intensity value institute of X-ray diffraction method
The cellulose I type crystallinity of calculating is defined by following calculating formulas (A),
Cellulose I type crystallinity (%)=[(I22.6- I18.5)/I22.6]×100(A)
In formula, I22.6Indicate the lattice plane of X-ray diffraction, the i.e. diffracted intensity in 002 face, 2 θ=22.6 ° of the angle of diffraction；I18.5It indicates
The diffracted intensity in amorphous portion, 2 θ=18.5 ° of the angle of diffraction.
2. evaporative pattern as described in claim 1 coat composition, wherein the crystallinity of the amorphous cellulose is
30% or less.
3. evaporative pattern as claimed in claim 1 or 2 coat composition, wherein the amorphous cellulose is granular.
4. evaporative pattern as claimed in claim 3 coat composition, wherein the average grain diameter of the amorphous cellulose is
50~500 μm.
5. evaporative pattern as claimed in claim 1 or 2 coat composition, wherein the content phase of the amorphous cellulose
It is 1~12 mass parts for 100 mass parts of refractory aggregate.
6. evaporative pattern as claimed in claim 1 or 2 coat composition also contains dispersing agent, and the dispersing agent is not
Make the decrystallized cellulose dissolution.
7. a kind of manufacturing method of casting evaporative pattern is the system of the casting evaporative pattern around evaporative pattern with film
Method is made, is included
Make evaporative pattern described in any one of claims 1 to 6 be attached to around the evaporative pattern with coat composition and
The process for forming film.
8. a kind of manufacturing method of casting is using the manufacturing method of the casting of casting evaporative pattern, the casting disappears
Mould is made by the manufacturing method of casting evaporative pattern as claimed in claim 7, is included
The process casting being embedded in evaporative pattern in molding sand；And
To the process for the casting evaporative pattern casting molten metal being embedded in the molding sand.
9. purposes of the composition described in any one of claims 1 to 6 as the coat of evaporative pattern.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014243981A JP6235448B2 (en) | 2014-12-02 | 2014-12-02 | Disappearance model coating composition |
| JP2014-243981 | 2014-12-02 | ||
| PCT/JP2015/077944 WO2016088439A1 (en) | 2014-12-02 | 2015-10-01 | Coating agent composition for evaporative pattern |
Publications (2)
| Publication Number | Publication Date |
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| CN107073560A CN107073560A (en) | 2017-08-18 |
| CN107073560B true CN107073560B (en) | 2019-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201580059794.1A Active CN107073560B (en) | 2014-12-02 | 2015-10-01 | Evaporative pattern coat composition |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP6235448B2 (en) |
| KR (1) | KR20170089840A (en) |
| CN (1) | CN107073560B (en) |
| TW (1) | TWI677542B (en) |
| WO (1) | WO2016088439A1 (en) |
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|---|---|---|---|---|
| JP6231465B2 (en) * | 2014-11-19 | 2017-11-15 | 株式会社神戸製鋼所 | Disappearance model casting method |
| CN107457350A (en) * | 2017-06-21 | 2017-12-12 | 河池市森机械有限责任公司 | The preparation method of cast paint |
| CN107442741A (en) * | 2017-08-21 | 2017-12-08 | 马鞍山市三川机械制造有限公司 | A kind of preparation method of high-quality cast paint |
| CN107282871A (en) * | 2017-08-21 | 2017-10-24 | 马鞍山市三川机械制造有限公司 | A kind of Automobile flywheel shell cast paint |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1663707A (en) * | 2005-01-28 | 2005-09-07 | 曹博海 | Improved water based coating for lost foam |
| CN102439046A (en) * | 2009-05-21 | 2012-05-02 | 花王株式会社 | Process for producing non-crystalline cellulose |
| CN102688984A (en) * | 2011-05-25 | 2012-09-26 | 大连金河铸造有限公司 | Casting process using evanescent mode |
| CN102933332A (en) * | 2010-06-25 | 2013-02-13 | 花王株式会社 | Structure for production of cast material |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2647856B2 (en) * | 1987-09-07 | 1997-08-27 | 花王株式会社 | Coating composition for casting |
| JPH03180244A (en) * | 1989-12-06 | 1991-08-06 | Okayama Pref Gov | Facing material for lost foamed polystyrene pattern |
| JP4278782B2 (en) * | 1999-06-18 | 2009-06-17 | 花王株式会社 | Coating agent composition |
-
2014
- 2014-12-02 JP JP2014243981A patent/JP6235448B2/en active Active
-
2015
- 2015-10-01 WO PCT/JP2015/077944 patent/WO2016088439A1/en active Application Filing
- 2015-10-01 CN CN201580059794.1A patent/CN107073560B/en active Active
- 2015-10-01 KR KR1020177012667A patent/KR20170089840A/en not_active Application Discontinuation
- 2015-11-12 TW TW104137389A patent/TWI677542B/en not_active IP Right Cessation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1663707A (en) * | 2005-01-28 | 2005-09-07 | 曹博海 | Improved water based coating for lost foam |
| CN102439046A (en) * | 2009-05-21 | 2012-05-02 | 花王株式会社 | Process for producing non-crystalline cellulose |
| CN102933332A (en) * | 2010-06-25 | 2013-02-13 | 花王株式会社 | Structure for production of cast material |
| CN102688984A (en) * | 2011-05-25 | 2012-09-26 | 大连金河铸造有限公司 | Casting process using evanescent mode |
Non-Patent Citations (1)
| Title |
|---|
| 《黄麻纤维对消失模铸造涂料透气性和强度的影响》;周洪等;《铸造》;20080229;第58卷(第2期);169-170、174 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2016107275A (en) | 2016-06-20 |
| KR20170089840A (en) | 2017-08-04 |
| JP6235448B2 (en) | 2017-11-22 |
| TWI677542B (en) | 2019-11-21 |
| CN107073560A (en) | 2017-08-18 |
| TW201623469A (en) | 2016-07-01 |
| WO2016088439A1 (en) | 2016-06-09 |
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