CN101316665A - Component for casting production and method for producing same - Google Patents
Component for casting production and method for producing same Download PDFInfo
- Publication number
- CN101316665A CN101316665A CNA2006800440683A CN200680044068A CN101316665A CN 101316665 A CN101316665 A CN 101316665A CN A2006800440683 A CNA2006800440683 A CN A2006800440683A CN 200680044068 A CN200680044068 A CN 200680044068A CN 101316665 A CN101316665 A CN 101316665A
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- China
- Prior art keywords
- producing castings
- mass ratio
- inorfil
- inorganic particle
- curing resin
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- 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
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- 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
- B22C1/08—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 for decreasing shrinkage of the mould, e.g. for investment casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C21/00—Flasks; Accessories therefor
- B22C21/12—Accessories
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
Abstract
Disclosed is a method for producing a component for casting production, which comprises a step for preparing a raw material slurry containing an inorganic fiber, an organic fiber, a thermosetting resin, a binder for papermaking, and a sulfonate-based or/and cellulose-based dispersing agent. It is preferable that the raw material slurry additionally contains an inorganic powder or/and a water repellent agent.
Description
Technical field
Member for producing castings and the manufacture method thereof used as gate spool etc. when the present invention relates to make foundry goods.
Background technology
About the member for producing castings that uses as gate spool etc. when making foundry goods, the applicant has proposed the technology that following patent documentation 1 is put down in writing.This technology is that the body paper that will contain organic fiber, inorfil and adhesive is configured as tubulose, compares with the refractory material that uses in the past, and light weight, easy processing and the waste treatment of foundry goods after casting etc. are also excellent.
Patent documentation 1: TOHKEMY 2004-174605 communique
But, in this member for producing castings that contains organic fiber, inorfil and adhesive, for suppress along with when casting organic fiber thermal decomposition and produce burning gases (the following gas that also only is called), the preferred content that suppresses organic fiber, but when reducing the content of organic fiber, exist the dispersed variation, the quality that contain composition to reduce easily, the great majority of gained member for producing castings become the problem of defective work.Particularly wanting has the problem of easy generation external waviness by copying slurry when making body paper.
Summary of the invention
The objective of the invention is to by using specific dispersant, even if also good member for producing castings and the manufacture method thereof of content that reduces organic fiber is provided.In addition, another object of the present invention is to provide good member for producing castings and the manufacture method thereof that organic fiber content suppresses to some extent.
The inventor etc. find also can obtain good member for producing castings even if reduce the content of organic fiber, thereby finish the present invention by using specific dispersant.
The present invention finishes in view of above-mentioned discovery, it has reached above-mentioned purpose by the manufacture method that following member for producing castings is provided, and it is or/and the operation of the raw material slip of cellulose-based dispersant with adhesive, sulfonate that above-mentioned manufacture method possesses that modulation contains inorfil, organic fiber, heat-curing resin, copies slurry.
In addition, the invention provides member for producing castings, it is characterized in that, contain inorfil, organic fiber, heat-curing resin and copy slurry with adhesive and contain sulfonate and be or/and cellulose-based dispersant.
Description of drawings
Fig. 1 is for schematically representing the stereogram of an embodiment of the invention.
Fig. 2 is the profile of mold used in the backwash evaluation of schematically representing embodiment.
The specific embodiment
Following basis is preferred embodiment with reference to description of drawings the present invention.
At first, according to member for producing castings of the present invention preferred embodiment is described.The member for producing castings 10 of present embodiment shown in Figure 1 with respect to inorganic particle, inorfil, organic fiber, the heat-curing resin of 100 quality %, copy the total content of slurry with adhesive and water-repelling agent, the sulfonate system of containing 0.001～10 quality %, preferred 0.01～10 quality % is or/and cellulosic dispersant.By containing dispersant, can in the content that reduces above-mentioned organic fiber, make good member for producing castings in this scope.
As the dispersant of above-mentioned sulfonate system, can enumerate the formaldehyde condensation products, aromatic amino sulphonic acid sodium salt polymer, kayexalate salt, polystyrolsulfon acid/poly-Malaysia sulfonate sodium copolymer, dicyclopentadiene sulfonate sodium polymer, poly-aliphatic diene sulfonate sodium polymer of formaldehyde condensation products, Reveal, the melamine sulfonate sodium of beta-naphthalenesulfonic-acid sodium salt etc.Wherein, when considering the quality of body paper of the moisture state after manufacturing paper with pulp, the preferred degree of polycondensation is the formaldehyde condensation products of 3～6 beta-naphthalenesulfonic-acid sodium salt.
As above-mentioned cellulose-based dispersant, can enumerate highly-water-soluble, with the consoluet dispersant of the 1 quality % aqueous solution, for example cellulosic propylene oxide adduct derivative such as hydroxypropyl cellulose, hydroxypropyl methylcellulose.When the quality of the body paper of considering the moisture state after manufacturing paper with pulp, preferred hydroxypropyl cellulose.
Above-mentioned dispersant can use separately or select to use more than 2 kinds.
With respect to above-mentioned inorganic particle, inorfil, organic fiber, heat-curing resin, copy the gross mass of slurry with adhesive and water-repelling agent, the match ratio of each composition of the member for producing castings of present embodiment (mass ratio) be inorganic particle/inorfil/organic fiber/heat-curing resin (solid constituent)/copy scope of slurry usefulness adhesive (solid constituent)/water-repelling agent=0～70%/1～60%/1～40%/1～40%/1～10%/0～5% (mass ratio), be preferably 40～70%/1～10%/1～25%/1～25%/1～10%/0～5% (mass ratio), 50～70%/1～8%/1～20%/10～25%/3～7%/0～1% (mass ratio) more preferably.In addition, the mass ratio that contains of above-mentioned each composition adds up to 100%.When the match ratio of inorganic particle was in this scope, the shape retention during casting, the superficiality of formed products became well, and the release property after being shaped in addition is also suitable.The match ratio of inorfil is in this scope the time, and the shape retention when copying slurry property, casting is good.When the match ratio of organic fiber is in this scope, copy good, the burning gases generation in the time of can reducing casting of slurry property, therefore can suppress backwash (adverse current of motlten metal).The match ratio of heat-curing resin is in this scope the time, and shape retention, surface smoothing after the formability of mold, the casting are good.When copying the slurry adhesive in this scope the time, in copying slurry, form best agglomerate (flock) thereby can make powder composition in the raw material be adsorbed on the fiber and moderately twine between the fiber, yield rate is also good.When the match ratio of water-repelling agent during in this scope, the bonding agent that uses when making member for producing castings by the body paper of making after copying slurry can not penetrate in the body paper, gets final product with an amount of bonding agent use amount.Moisture in the foundry goods sand when in addition, member for producing castings being imbedded in the foundry goods sand can not be penetrated in the member for producing castings.
As above-mentioned inorganic particle, can enumerate graphite such as obsidian, mullite and flake graphite, amorphous graphite etc.Inorganic particle can use or select two or more uses separately.The carbon amount of foundry goods is 4.2 quality % when following, can soak carbon phenomenon (carbon be absorbed in the foundry goods and the phenomenon that becomes fragile).At this moment, for prevent from the foundry goods carbide soak the carbon phenomenon, must use the inorganic particle that contains silica.As this inorganic particle, preferably use obsidian, mullite etc.In addition, the carbon content of foundry goods is 4.2 quality % when above, can not contain inorganic particle.
Above-mentioned inorfil mainly forms the skeleton of member for producing castings, does not keep its shape even the heat of the motlten metal for example by when casting also can not be burnt.As above-mentioned inorfil, can enumerate man-made mineral fiber, ceramic fibre, natural mineral fibers such as carbon fiber, rock wool, can use or select two or more uses separately.Wherein, the viewpoint from the contraction that suppresses to follow above-mentioned heat-curing resin carbonization effectively also has high-intensity pitch system or polyacrylonitrile (PAN) based carbon fiber even if preferably use, preferred especially PAN based carbon fiber under the high temperature.
The viewpoint of the molded item quality when being shaped from member for producing castings being copied slurry, the average fiber length of above-mentioned inorfil are preferably 0.1～10mm, 0.5～8mm more preferably.In addition, also can cooperate long fibre more than the 10mm in the stage, utilize chopped fibers such as scouring machine, its average fiber length is controlled to 0.1～10mm, use then at slip.
In the above-mentioned organic fiber, can enumerate synthetic fibers after paper pulp fiber, the fibrillation, regenerated fiber (for example rayon fiber) etc.Organic fiber can use or select two or more uses separately.From the viewpoint of formability, dried intensity, cost, preferred paper pulp fiber.
As above-mentioned paper pulp fiber, can enumerate other non-wood pulps such as wood pulp, cotton paper slurry, cotton linters paper pulp, bamboo or straw.Paper pulp fiber can use or select to use the fresh paper pulp or the old paper pulp of two or more they separately.From obtaining the viewpoints such as reduction of easiness, environmental protection, manufacturing expense, the preferred especially old paper pulp of paper pulp fiber.
When considering surface smoothing, resistance to impact, the average fiber length of above-mentioned organic fiber is preferably 0.1～20mm, 0.5～10mm more preferably.
Above-mentioned heat-curing resin is in the normal temperature strength of keeping member for producing castings 10 and elevated temperature strength, and the superficiality of hear resistance paper tube layer is become well, and improves the necessary composition of surface roughness of foundry goods.As above-mentioned heat-curing resin, can enumerate phenolic resins, epoxy resin, furane resins etc.Wherein, from the generation of burning gases less, have burning and suppress carbon residue rate after effect, the thermal decomposition (carbonization) up to forming the carbonization overlay film more than 25%, when being used to cast and obtaining the viewpoint of good cast(ing) surface, especially preferably use phenolic resins.Here, the carbon residue rate be meant under blanket of nitrogen with 50 ℃ of/minute samples of programming rate with heat-curing resin be heated to from normal temperature the quality measured after 1200 ℃ before divided by heating quality and the value that obtains.Add and pine for, owing to from heat-curing resin, discharge burning gases, therefore light before the mass ratio heating after the heating.Use the phenolic resins need the novolac resin of curing agent, not need the solvable type etc. of curing agent in the phenolic resins.In order to suppress the stripping free-phenol in the plain boiled water as possible, the preferred use hanged down the free phenol urea formaldehyde.For example, preferably by the HMW type of the resol resin that base catalyst or acidic catalyst synthesized.When using novolac resin, need curing agent.Because this curing agent is water-soluble easily, therefore preferably after the dehydration of body paper, apply in its surface.The preferred hexa etc. that uses in the above-mentioned curing agent.Above-mentioned heat-curing resin can separately or be selected two or more uses.
Except carbon monoxide, carbon dioxide, also comprise hydrocarbon such as methane, ethene etc. in the above-mentioned burning gases.
Use adhesive as the above-mentioned slurry of copying, can enumerate starch, gelatin, (the Japanese original text is: inorganic bonds such as latex, cataloid, alumina series such as water-soluble synthetic high polymer such as (daiamid epichlorohydrin resins), PVA (polyvinyl alcohol), PAM (polyacrylamide), PEO (PEO) and phenylethylene/butadiene system, acrylonitrile/butadiene system, acrylic acid series, vinylacetate system etc. カ イ メ Application) for the sore glue of healing, CMC natural polymers such as (carboxymethyl celluloses), sponge.Wherein, preferably use the sponge, CMC, acrylic acid series latex etc. of the immobilization characteristic excellence of powder.Copy slurry with the addition of adhesive in the solid constituent conversion, be preferably above-mentioned organic fiber quality 0.01～5%, be preferably 0.02～1% especially.These are copied slurry and can use a kind of with adhesive or select two or more uses or compound back use.
In member for producing castings 10, infiltrate into body paper, prevent strength deterioration that moisture absorption causes etc. in order to prevent above-mentioned bonding agent, can add water-repelling agent.As above-mentioned water-repelling agent, can use silicon-type, fluorine system, grease system, hydrophobic surfactant, hydrophobic polymer.Particularly the surfaces externally and internally by being coated in member for producing castings 10 and carry out drying can prevent the strength deterioration that moisture absorption causes.As the proterties of these water-repelling agents, by making aqueous solution or emulsion, the processing in the use obtains simplifying.These water-repelling agents can use or select two or more uses separately.Wherein, the emulsion of preferred silicon-type, fluorine system, grease system.Especially in the slip time,, compare acid resistance, AKD (alkyl ketene dimer) that alkali resistance is more excellent with resin etc. preferably in neutral region, to have excellent hydrophobicity on a small quantity.Water-repelling agent can add in the raw material slip in right amount, can also be coated on the member for producing castings.Painting method can be enumerated spray-on process, bristle coating, immersion coating, overflow coating, and from productivity ratio, preferred spraying, immersion coating, overflow apply.Here overflow coating is meant and utilizes flexible pipe to be coated on the parts by the solution overflow of pump suction.In addition, the environment for use of member for producing castings is drying regime or makes heat-curing resin show hydrophobicity according to kind or its use amount of above-mentioned heat-curing resin sometimes, at this moment also can not add water-repelling agent.
In member for producing castings 10, except above-mentioned each composition, can also add other compositions such as agglutinant, colouring agent with proper proportion.
Member for producing castings 10 preferred surface roughness Ra are below the 20 μ m, more preferably below the 10 μ m.Here, surface roughness Ra is measured by Surtronic10 (Rank Taylor Hobson corporate system) etc.
Member for producing castings 10 is preferred with the body paper formation that contains above-mentioned each composition.The hot strength of this body paper is preferably 40N/15mm, is preferably more than the 80N/15mm especially.Hot strength can be utilized Tensilon universal testing machine (A﹠amp by thickness 0.7mm body paper is cut to width 15mm; The system RTA500 of D Co., Ltd.) carrying out tension test measures.When thickness not simultaneously, the power that is scaled the per unit sectional area compares.Hot strength when this scope, fracture in the time of can preventing that member for producing castings formed paper tube shown in present embodiment etc.
From guaranteeing the aspect of intensity, the compressive strength under the state before being used to cast of member for producing castings 10 is preferably more than the 20N, more preferably more than the 40N.Here, the compressive strength of member for producing castings is meant these parts is cut into width 60mm, under the state of traverse shear surface, uses Tensilon universal testing machine (A﹠amp; D Co., Ltd. system RTA500) waiting compression strength detection device is to depress under the 10mm/ branch at compression speed, thus the compressive strength of the pipe side of mensuration.
The gross thickness of member for producing castings 10 can suitably be set according to its used place, consider the intensity guaranteed as member for producing castings, guarantee gas permeability, suppress manufacturing cost etc., the gross thickness of member for producing castings 10 is preferably 0.5～6mm, 1～3mm more preferably.
Member for producing castings 10 is when contacting with motlten metal, and from suppressing the aspect that steam produces as possible, the moisture content (quality moisture content) of the state before being used to cast is preferably below 20%, more preferably below 10%.This is because the generation of steam is the reason of motlten metal from inflow entrance backwash (adverse current).
Below, the preferred implementation of the manufacture method of member for producing castings of the present invention is described according to the manufacture method of above-mentioned member for producing castings 10.
The paper roll that member for producing castings 10 is used by paper tube constitutes around 2 the paper tube layers 11 and 12 that form.In the manufacturing of member for producing castings 10, at first make the body paper of paper tube layer 11 and 12.
These paper tube layers 11 and 12 the following making of body paper: modulation contains the above-mentioned inorganic particle that constitutes member for producing castings 10, above-mentioned inorfil, above-mentioned organic fiber, above-mentioned heat-curing resin, the above-mentioned raw material slip of copying slurry usefulness adhesive, above-mentioned dispersant respectively, copy the slurry method by wet type and copy slurry, dehydration, drying, thereby make by their raw material slip.
The decentralized medium of above-mentioned raw materials slip can also be enumerated ethanol, methyl alcohol equal solvent etc. except water, plain boiled water.Wherein, reduce, handle viewpoints such as easy, preferred water from stability, the stability of quality, the expense of copying slurry, dehydration shaping.
Can add additives such as agglutinant, anticorrisive agent in the above-mentioned raw materials slip.
Use the as above raw material slip of modulation, the body paper of paper tube layer usefulness is copied slurry.
Hold with both hands with both hands method etc. of the hand that the copying paste-making method and for example can adopt use to copy the paste-making method of copying of the cylinder pulp machine of slurry formula, fourdrinier wire pulp machine, short net pulp machine, mariages pulp machine etc. continuously of these body paper, batch-type are copied paste-making method is copied paste-making method.
Copy the above-mentioned body paper in slurry back in order to keep conformality or mechanical strength, also make this each body paper dehydration reach preferred below 30%, more preferably below 10% until moisture content.Copy in the dewatering of the body paper behind the slurry except for example utilizing the dehydration of suction, can also adopting and brush forced air and carry out dehydration method, utilize backer roll or the increased pressure board dewaterings such as carrying out dehydration method that pressurizes.
Then, the above-mentioned body paper behind the drying and dehydrating in drying process.Drying in the drying process can be used the usual way that uses in the drying of paper in the past.
The hot strength of dehydration, dried above-mentioned body paper considering when being wound into paper tube, be preferably 40N/15mm above, more preferably more than the 80N/15mm.Wherein, hot strength can followingly be measured: the body paper of thickness 0.7mm is cut to width 15mm, carries out tension test by above-mentioned Tensilon universal testing machine, thereby measure.Each sample thickness of measuring not simultaneously, the power that is converted into the per unit sectional area compares.
When considering the intensity of gained member for producing castings, the buckling strength of dehydration, dried above-mentioned body paper is preferably more than the 3N, more preferably more than the 4N.Here, buckling strength is by 3 crooked buckling strength test determinations, the body paper that is about to width 60mm, long 100mm is placed on and is set at length of support on the determinator of 40mm, utilize width 60mm, point diameter 6mm push pestle by on carry out compression test, thereby mensuration.In addition, the displacement of buckling of dehydration, dried above-mentioned body paper is preferably more than the 3mm, more preferably more than the 5mm equally.Here, the displacement of buckling is meant the deflection of the body paper of maximum stress point in above-mentioned 3 bend tests.
The burning gases generation of the per unit mass of these parts of dewater, dried above-mentioned body paper is preferred 1000 ℃ is below the 250cc/g, more preferably below the 200cc/g.The burning gases generation (is measured machine name: No.682 GAS PRESSURETESTERHARRY W.DIETERT CO. system) measure by burning gases generation determinator.The burning gases generation is low more preferred more, is limited to 0.1～1cc/g under its in the practicality.
The surface roughness Ra of dehydration, dried above-mentioned body paper is preferably below the 20 μ m, more preferably below the 10 μ m.Herein, surface roughness Ra waits and measures by Surtronic 10 (Rank Taylor Hobson corporate system).
Dehydration, dried above-mentioned body paper are when being added with above-mentioned water-repelling agent, and hydrophobicity is preferably below 15%, more preferably below 10%.Here, the hydrophobicity of body paper is for example measured according to the absorption of water test method of the paper and the cardboard of JIS P8140 regulation (suddenly method, Cobb method).In addition, making time of contact of test film and water is to measure in 60 seconds.
The density of dehydration, dried above-mentioned body paper is preferably 0.62～0.9g/m
3, 0.64～0.75g/m more preferably
3In the time of in this scope, can on the other hand, can not take place when being wound into paper tube owing to undercapacity takes place by blocking of body paper because the coiling processing that the flexural rigidity surplus of body paper is caused becomes difficult.
Then, each body paper of gained is cut into Rack, overlappingly is rolled into helical form and is configured as tubular.The method for winding of body paper can be an overlapping coiling on same direction, can also be overlapping in different directions coiling.During for equidirectional, the overlapping coiling of mode of the part of the seam of the body paper before preferably becoming behind the overlapping coiling according to covering.Use suitable bonding agent to be configured as tubular during overlapping coiling.The internal diameters of the width of each body paper, overlapping width, paper tube etc. are set according to quality (by the amount of the motlten metal in managing), the moulding intensity (can tolerate the intensity of the pressure when making sand mo(u)ld) of foundry goods.
After the overlapping coiling of all layers is finished, heat drying under set point of temperature, and shear and to be processed into given size, thereby finish the manufacturing of member for producing castings.
The member for producing castings of present embodiment is that the burning gases when having suppressed organic fiber content and fine texture, casting produce repressed excellent parts.
In addition, the casting member for producing 10 of present embodiment gas generated under 1000 ℃ is 250 liters/m
2Below, be preferably 150 liters/m
2Below.Here, m
2It is the SU of these parts of the average diameter of member for producing castings 10.In addition, average diameter is meant the diameter that (interior diameter+overall diameter)/2 calculate.Gas generated low more preferred more, be limited to 1～10 liter/m under its in the practicality
2Here, gas generated under 1000 ℃ (measured machine name: No.682 GAS PRESSURETESTER HARRY W.DIETERT CO. system) measure by gas generated determinator.
As mentioned above, in this specification, the burning gases generation of body paper uses the unit of cc/g, and in addition, the burning gases generation of member for producing castings uses liter/m
2Unit.This be because, use identical body paper (promptly with shown in the cc/g gas generated identical) when making the parts for making tubular cast of different interior diameters, the more little then easy more generation backwash of interior diameter (adverse current of motlten metal), only the unit with cc/g can't estimate the easiness that backwash takes place.In addition, the more little then reason of easy more generation backwash of interior diameter is to compare with the bigger situation of interior diameter, and the volume ratio that is present in the motlten metal in the parts for making tubular cast is less, i.e. the weight of the motlten metal of backwash is low weight.
And the member for producing castings of present embodiment can be same, utilizes light weight, simple device can easily shear processing etc., and therefore operability is also excellent aspect this.
The present invention is not limited to above-mentioned embodiment, can suitably change in the scope that does not break away from purport of the present invention.
In the above-mentioned embodiment, constitute member for producing castings, but also can constitute by the paper tube layer more than 3 by two paper tube layers.But these layers constitute and can suitably set according to moulding intensity, elevated temperature strength, body paper thickness etc.Here, elevated temperature strength is meant the mechanical strength when being contacted with motlten metal.
In addition, in the above-described embodiment, by having made member for producing castings by copying the body paper that slurry obtains in advance, but also can be by the above-mentioned raw materials slip by the known in the past paper mould method member for producing castings of manufacturing paper with pulp.
Embodiment
More specifically describe the present invention by the following examples.The present invention is not limited to present embodiment.
[embodiment 1]
Use the former paper material of following pipe layer usefulness to make to estimate and use the body paper sample sheets, and the quality of following evaluation gained body paper (dispersivenesses of surface waviness, inorganic particle etc.), surface roughness and burning gases generation.These the results are shown in the table 1.
[evaluation of paper tube layer usefulness is formed with the body paper sample]
Inorganic particle: obsidian powder (average grain diameter 30 μ m), 65.5 quality %
Inorfil: carbon fiber (length 3mm (TORAY Co., Ltd. system: the TORAYCA trade mark)), 4 quality %
Organic fiber: old paper, 12 quality %
Heat-curing resin: resol resin (Air Water Bellpearl Co., Ltd. system, Bellpearl S-890), 18 quality %
Copy the slurry adhesive: sponge, 0.25 quality %
Copy slurry adhesive: CMC, 0.25 quality %
Water-repelling agent: do not add
(above raw material amounts to 100 quality %)
Dispersant: beta-naphthalenesulfonic-acid sodium salt formaldehyde condensation products (Kao Corp's system, Demol N), 0.5 quality % (with respect to inorganic particle, inorfil, organic fiber, the heat-curing resin of 100 quality %, copy the total content of slurry, add this dispersant of 0.5 quality %) with adhesive and water-repelling agent
According to above-mentioned cooperation ratio, raw material 100g, above-mentioned dispersant 0.5g are put into 2L with in the beverage mixer (juicer mixer) with 1.9 premium on currency (below be labeled as L), mix and stirred 3 minutes, obtain the raw material slip.Then, gained raw material slip is put into the testing machine of manufacturing paper with pulp (the former paper size of gained: indulge 250mm * horizontal 250mm, copy the slurry net: 40 orders, capacity: 15L), stir the back and placed 1 minute with dilution water 13L.Afterwards, manufacture paper with pulp, discharge plain boiled water, obtain moistening body paper.Then under 0.1MPa the moistening body paper of gained is pressurizeed, drying is 30 minutes in 105 ℃ drying machine, obtains the body paper sample.
[evaluation of surface waviness]
For the surface waviness state of the table side (with copying the opposite side of slurry wire side) of the slurry face of copying of estimating above-mentioned body paper sample, to highly counting for " projection " more than the 1mm is several, following commentary branch is estimated.
The evaluation score of surface waviness
0 minute: " projection " number existed more than 50
1 minute: there were 40～49 in " projection " number
2 minutes: there were 30～39 in " projection " number
3 minutes: there were 20～29 in " projection " number
4 minutes: there were 10～19 in " projection " number
5 minutes: " projection " number was less than below 9
[dispersiveness of inorfil]
The quantity that the inorfil of the dorsal part of copying the slurry face of above-mentioned body paper sample (copying slurry wire side side) has been taken place in aggegation is counted, and estimates with following scoring.
0 minute: aggegation the carbon fiber number exist more than 50
1 minute: aggegation the carbon fiber number have 40～49
2 minutes: aggegation the carbon fiber number have 30～39
3 minutes: aggegation the carbon fiber number have 20～29
4 minutes: aggegation the carbon fiber number have 10～19
5 minutes: aggegation the carbon fiber number less than below 9
[dispersiveness of inorganic particle and heat-curing resin]
Judge the inorganic particle of dorsal part (copy slurry wire side side) of above-mentioned body paper sample and the evaluation score that the area ratio of aggegation has taken place heat-curing resin.The dispersion of this composition is bad to be owing to be trapped in the dorsal part of body paper sample.
0 minute: inorganic particle and heat-curing resin aggegation area ratio have 80～100%
1 minute: inorganic particle and heat-curing resin aggegation area ratio have 60～79%
2 minutes: inorganic particle and heat-curing resin aggegation area ratio have 40～59%
3 minutes: inorganic particle and heat-curing resin aggegation area ratio have 20～39%
4 minutes: inorganic particle and heat-curing resin aggegation area ratio have 10～19%
5 minutes: inorganic particle and heat-curing resin aggegation area ratio exist below 9%
(what can visual judgement inorganic particle aggegation have taken place is the state of the powder aggegation of turning white.What in addition, can visual judgement heat-curing resin aggegation have taken place is the state of yellow powder aggegation.)
[evaluation of quality]
Utilize the comprehensive grading of above-mentioned [surface waviness evaluation] and [each dispersiveness of inorganic particle, inorfil, heat-curing resin] to estimate.(the mark evaluation evaluation excellent more, the low more then quality of mark of quality more at most is poor more.)
[evaluation of surface roughness]
Surface roughness Ra is measured according to the operation manual of Surtronic10 (Rank Taylor Hobson corporate system).
[evaluation of burning gases generation]
The burning gases generation is to use gas generated determinator (to measure machine name: No.682GASPRESSURE TESTER HARRY W.DIETERT CO. system) measure in the following order.At first the temperature in the stove is set at 1000 ℃.Then exactly working sample quality 0.1g (nominal mass) is carried out quality determination with mg unit.Then, on the sample platform of gas generated determinator, place this sample, measure the burning gases generation according to the handbook of measuring machine.The burning gases generation carries out program calculating with the integrated value that burning gases produce speed, calculates with the burning gases generation after 30 seconds elapsed time.In addition, burning gases produce the Chromatopack C-R4A of anacom use Shimadzu Seisakusho Ltd. system of speed and burning gases generation.
[embodiment 2]
Except dispersant being changed into the following dispersant, make the body paper sample similarly to Example 1.And, the gained body paper is carried out similarly to Example 1 evaluation.These the results are shown in the table 1.
Klucel H), this dispersant is owing to be slightly solubility dispersant: hydroxypropyl cellulose (HERCULES Co., Ltd. system:, therefore dilute in advance and add 0.5 quality % for being scaled solid constituent behind concentration 1% aqueous solution.
[comparative example 1]
Except not using the dispersant, make body paper similarly to Example 1, and make member for producing castings similarly to Example 1.And, the gained body paper is carried out similarly to Example 1 evaluation.These the results are shown in the table 1.
[comparative example 2]
Use the effective former paper material of following layer to make body paper similarly to Example 1.
Here, the amount that makes organic fiber is 2 times of embodiment 1, and does not add dispersant, has made body paper.
[evaluation of paper tube layer usefulness is formed with the body paper sample]
Inorganic particle: obsidian powder (average grain diameter 30 μ m), 48 quality %
Inorfil: carbon fiber (length 3mm (TORAY Co., Ltd. system: the TORAYCA trade mark)), 9.5 quality %
Organic fiber: old paper, 24 quality %
Heat-curing resin: resol resin (Air Water Bellpearl Co., Ltd. system, Bellpearl S-890), 18 quality %
Copy the slurry adhesive: sponge, 0.25 quality %
Copy slurry adhesive: CMC, 0.25 quality %
Water-repelling agent: do not add
Dispersant: do not add
(above raw material amounts to 100 quality %)
Table 1
As shown in Table 1, compare with comparative example 1 by the body paper that each embodiment obtains, quality and surface roughness excellence, and the burning gases generation is suppressed.In addition, owing to use 2 times the organic fiber of embodiment, be the good body paper of quality and surface roughness therefore, but the burning gases generation increase in the comparative example 2.
[embodiment 3]
Make the parts for making tubular cast of two-layer structure shown in Figure 1 by the body paper of following composition.Then, the burning gases generation and the backwash of following evaluation gained member for producing castings.These the results are shown in the table 2.
The paper tube of＜embodiment 3 is formed with body paper 〉
Inorganic particle: obsidian powder (Kinseimatec corporate system, Na イ ス キ ヤ Star チ Off ラ ワ one #330), 57.3 quality %
Inorfil: carbon fiber (Mitsubishi Chemical Ind's system, PYROFIL TR03CM), 7.2 quality %
Organic fiber: the old paper of regenerating, 11.5 quality %
Heat-curing resin: resol resin (Air Water Co., Ltd. system, Bellpearl S-890), 17.5 quality %
Copy slurry and use adhesive: sponge,, 3.0 quality %
Copy slurry adhesive: CMC, 3.0 quality %
Water-repelling agent: alkyl ketene dimer, 0.5 quality %
(above raw material amounts to 100 quality %)
Dispersant: beta-naphthalenesulfonic-acid sodium salt formaldehyde condensation products (Kao Corp's system, Demol N), 0.5 quality % (with respect to inorganic particle, inorfil, organic fiber, the heat-curing resin of 100 quality %, copy the total content of slurry, add this dispersant of 0.5 quality %) with adhesive and water-repelling agent
According to above-mentioned cooperation ratio, raw material 100g, above-mentioned dispersant 0.5g are put into 2L with in the beverage mixer with 1.9 premium on currency (below be labeled as L), mix and stirred 3 minutes, obtain the raw material slip.Then, gained raw material slip is put into the testing machine of manufacturing paper with pulp (the former paper size of gained: indulge 250mm * horizontal 250mm, copy the slurry net: 40 orders, capacity: 15L), stir the back and placed 1 minute with dilution water 13L.Afterwards, manufacture paper with pulp, discharge plain boiled water, obtain moistening body paper.Then under 0.1MPa the moistening body paper of gained is pressurizeed, drying is 30 minutes in 105 ℃ drying machine, obtains the body paper sample.
The form of＜member for producing castings 〉
Above-mentioned thickness 0.7mm paper tube layer is cut into 2 kinds of width of wide 80mm and wide 82mm with body paper, on the axle of external diameter Φ 50mm with the body paper of width 80mm as the 1st layer, the body paper of width 82mm as the 2nd layer, apply the bonding agent limit according to the mode that covers the 1st layer seam the 2nd layer of top and carry out overlapping coiling, the parts for making tubular cast of construction drawing 1 form.
Bonding agent: phenolic resins emulsion (Sumitomo BAKELITE corporate system, PR-51464)
Gross thickness: 1.4mm
Interior diameter: 50mm
The evaluation of＜burning gases generation 〉
The burning gases generation is to use gas generated determinator (to measure machine name: No.682GASPRESSURE TESTER HARRY W.DIETERT CO. system) measure in the following order.At first the temperature in the stove is set at 1000 ℃.Then exactly working sample quality 0.1g (nominal mass) is carried out quality determination with mg unit.Then, on the sample platform of gas generated determinator, place this sample, measure the burning gases generation according to the handbook of measuring machine.The burning gases generation carries out program calculating with the integrated value that burning gases produce speed, calculates with the burning gases generation after 30 seconds elapsed time.In addition, burning gases produce the Chromatopack C-R4A of anacom use Shimadzu Seisakusho Ltd. system of speed and burning gases generation.
[evaluation of backwash]
As shown in Figure 2, in being combined with the curing sand (casting model powder) of furane resins, burying parts for making tubular cast 2～4 (each length is that 50cm, 30cm, 5cm, interior diameter are 50mm) underground in hatching portion, thereby make casting mould for testing 1.But elbow part is the pottery system.Then, flow into 1400 ℃ motlten metal 250kg from flowing into oral-lateral 5, by estimating with following two level evaluations from flowing into the backwash of oral-lateral.
Zero: have flame to produce slightly
*: generation highly is the flame about 1m
[comparative example 3]
Make the body paper except forming, make the parts for making tubular cast of two-layer structure similarly to Example 3 with following body paper.(compare with embodiment 3, making organic fiber value is more than 2 times, and does not use dispersant to make body paper).And, carry out similarly to Example 3 evaluation for the gained member for producing castings.These the results are shown in the table 2.
The body paper that the paper tube of＜comparative example 3 is used is formed 〉
Inorganic particle: mullite (エ system シ one mineral products Co., Ltd. system, mullite MM#200), 47.6 quality %
Inorfil: carbon fiber (Mitsubishi Chemical Ind's system, PYROFIL TR03CM), 4.2 quality %
Organic fiber: the old paper of regenerating, 25.0 quality %
Heat-curing resin: resol resin (Air Water Co., Ltd. system, Bellpearl S-890), 16.7 quality %
Copy the slurry adhesive: sponge, 3.0 quality %
Copy slurry adhesive: CMC, 3.0 quality %
Water-repelling agent: alkyl ketene dimer, 0.5 quality %
(above raw material amounts to 100 quality %)
Table 2
| Form | Body paper burning gases generation cc/g | Member for producing castings burning gases generation L/m 2 | Backwash is estimated |
| Embodiment 3 | 230 | 225.0 | ○ |
| Comparative example 3 | 260 | 315.8 | × |
As shown in Table 2, the burning gases generation of the member for producing castings that obtains by embodiment suppresses very lowly, can also prevent backwash.
According to the present invention, the burning gases generation the when content that suppressed organic fiber, casting can be provided suppresses and the member for producing castings of quality excellence to some extent.In addition, according to the present invention, can preferably make the member for producing castings of the above-mentioned effect of performance.
The present invention goes for constituting the various member for producing castings and the manufacture method thereof of molds such as sprue gate, gate spool, ingate, exhaust outlet, rising head, sand mo(u)ld.
Claims (13)
1. the manufacture method of a member for producing castings, it has the operation of preparation raw material slip, and described raw material slip contains inorfil, organic fiber, heat-curing resin, copies slurry is or/and cellulose-based dispersant with adhesive, sulfonate.
2. the manufacture method of member for producing castings according to claim 1, wherein, described raw material slip also further contains inorganic particle or/and water-repelling agent.
3. the manufacture method of member for producing castings according to claim 2, wherein, the mass ratio that contains of described inorganic particle is 0～70%, the mass ratio that contains of described inorfil is 1～60%, the mass ratio that contains of described organic fiber is 1～40%, the mass ratio that contains of described heat-curing resin is 1～40%, copying the mass ratio of starching with adhesive that contains is 1～10%, the mass ratio that contains of water-repelling agent is 0～5%, and described inorganic particle, described inorfil, described organic fiber, described heat-curing resin, the described slurry of copying is 100 quality % with the total content of adhesive and described water-repelling agent.
4. according to the manufacture method of each described member for producing castings of claim 1～3, wherein, the dispersant that described sulfonate is is that the degree of polycondensation is 3～6 beta-naphthalenesulfonic-acid sodium salt formaldehyde condensation products.
5. according to the manufacture method of each described member for producing castings of claim 1～3, wherein, described cellulose-based dispersant is cellulosic propylene oxide adduct derivative.
6. according to the manufacture method of each described member for producing castings of claim 2～4, wherein, described raw material slip contains and is selected from obsidian, mullite and the graphite more than one as described inorganic particle, contain and be selected from carbon fiber, rock wool and the ceramic fibre more than one, contain and be selected from phenolic resins, epoxy resin and the furane resins more than one as described heat-curing resin as described inorfil.
7. a member for producing castings is characterized in that, contains inorfil, organic fiber, heat-curing resin and copies slurry and use adhesive, and contain sulfonate and be or/and cellulose-based dispersant.
8. member for producing castings according to claim 7 is characterized in that, the burning gases generation under 1000 ℃ is 250 liters/m
2Below.
9. according to claim 7 or 8 described member for producing castings, it also further contains inorganic particle or/and water-repelling agent.
10. member for producing castings according to claim 9, wherein, the mass ratio that contains of described inorganic particle is 0～70%, the mass ratio that contains of described inorfil is 1～60%, the mass ratio that contains of described organic fiber is 1～40%, the mass ratio that contains of described heat-curing resin is 1～40%, copying the mass ratio of starching with adhesive that contains is 1～10%, the mass ratio that contains of water-repelling agent is 0～5%, and described inorganic particle, described inorfil, described organic fiber, described heat-curing resin, the described slurry of copying is 100 quality % with the total content of adhesive and described water-repelling agent.
11. according to each described member for producing castings of claim 7～10, wherein, the dispersant that described sulfonate is is that the degree of polycondensation is 3～6 beta-naphthalenesulfonic-acid sodium salt formaldehyde condensation products.
12. according to each described member for producing castings of claim 7～10, wherein, described cellulose-based dispersant is cellulosic propylene oxide adduct derivative.
13. according to each described member for producing castings of claim 9～12, wherein, contain and be selected from obsidian, mullite and the graphite more than one as described inorganic particle, contain and be selected from carbon fiber, rock wool and the ceramic fibre more than one, contain and be selected from phenolic resins, epoxy resin and the furane resins more than one as described heat-curing resin as described inorfil.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP346814/2005 | 2005-11-30 | ||
| JP346813/2005 | 2005-11-30 | ||
| JP2005346814 | 2005-11-30 | ||
| JP2005346813 | 2005-11-30 | ||
| PCT/JP2006/323797 WO2007063888A1 (en) | 2005-11-30 | 2006-11-29 | Component for casting production and method for producing same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101316665A true CN101316665A (en) | 2008-12-03 |
| CN101316665B CN101316665B (en) | 2011-04-27 |
Family
ID=38092221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006800440683A Expired - Fee Related CN101316665B (en) | 2005-11-30 | 2006-11-29 | Component for casting production and method for producing same |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20090211717A1 (en) |
| EP (1) | EP1958717B1 (en) |
| KR (1) | KR101205749B1 (en) |
| CN (1) | CN101316665B (en) |
| WO (1) | WO2007063888A1 (en) |
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| CN105834367A (en) * | 2016-05-13 | 2016-08-10 | 湖州炜炎环保科技有限公司 | Technology for manufacturing paper pouring gate pipe for casting |
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| TWI630041B (en) * | 2017-05-09 | 2018-07-21 | 皇廣鑄造發展股份有限公司 | Runner protection tube for casting and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4002200B2 (en) * | 2002-03-13 | 2007-10-31 | 花王株式会社 | Papermaking parts for casting production |
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- 2006-11-29 US US12/085,686 patent/US20090211717A1/en not_active Abandoned
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102933332A (en) * | 2010-06-25 | 2013-02-13 | 花王株式会社 | Structure for production of cast material |
| CN102933332B (en) * | 2010-06-25 | 2015-12-16 | 花王株式会社 | Structure for casting production |
| CN104884186A (en) * | 2012-12-28 | 2015-09-02 | 花王株式会社 | Method for producing structure for casting and structure such as mold |
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| CN104943243A (en) * | 2015-06-19 | 2015-09-30 | 姚伟 | Preparation process of paper pouring earthenware pipe |
| CN104985109A (en) * | 2015-07-06 | 2015-10-21 | 安徽三联泵业股份有限公司 | Modified casting sand used for casting pump body and adopting furan resin loaded with carbon nanometer fibers |
| CN105834367A (en) * | 2016-05-13 | 2016-08-10 | 湖州炜炎环保科技有限公司 | Technology for manufacturing paper pouring gate pipe for casting |
| TWI630041B (en) * | 2017-05-09 | 2018-07-21 | 皇廣鑄造發展股份有限公司 | Runner protection tube for casting and manufacturing method thereof |
| CN108296424A (en) * | 2017-09-27 | 2018-07-20 | 柳州市柳晶科技股份有限公司 | A kind of 3D printing precoated sand prepared as adhesive using cellulose |
| CN108296424B (en) * | 2017-09-27 | 2020-04-10 | 柳州市柳晶科技股份有限公司 | 3D printing precoated sand prepared by taking cellulose as adhesive |
| CN110170611A (en) * | 2019-04-03 | 2019-08-27 | 张储 | A kind of casting fibrous type casing forming technique |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1958717A1 (en) | 2008-08-20 |
| EP1958717A4 (en) | 2011-04-13 |
| WO2007063888A1 (en) | 2007-06-07 |
| US20090211717A1 (en) | 2009-08-27 |
| CN101316665B (en) | 2011-04-27 |
| KR20080072013A (en) | 2008-08-05 |
| KR101205749B1 (en) | 2012-11-28 |
| EP1958717B1 (en) | 2019-01-09 |
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