CN1974058A - Parts for making tubular cast - Google Patents
Parts for making tubular cast Download PDFInfo
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- CN1974058A CN1974058A CNA2006101439416A CN200610143941A CN1974058A CN 1974058 A CN1974058 A CN 1974058A CN A2006101439416 A CNA2006101439416 A CN A2006101439416A CN 200610143941 A CN200610143941 A CN 200610143941A CN 1974058 A CN1974058 A CN 1974058A
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- paper
- paper tube
- tube layer
- parts
- proofing property
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C39/12—Making multilayered or multicoloured articles
- B29C39/123—Making multilayered articles
- B29C39/126—Making multilayered articles by casting between two preformed layers, e.g. deformable layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/003—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor characterised by the choice of material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/22—Component parts, details or accessories; Auxiliary operations
- B29C39/26—Moulds or cores
Abstract
The member 10 for producing tubular casting has a waterproof paper tube layer 11 as the outermost layer and a heat-resistance paper tube layer containing inorganic fiber, organic fiber, inorganic powder and thermal setting resin is provided therein. The waterproof paper tube layer 11 preferably consists of normal paper which mainly contains organic fiber, or functional paper which is mainly constituted by inorganic fiber. Further more, the heat-resistance paper tube layer 12 preferably consists of at least two layers of heat-resistance paper which are connected by overlap their lap portion. And the waterproof paper tube layer 11 is constituted by brown paper.
Description
Technical field
When the present invention relates to make foundry goods as the parts for making tubular cast of flow-path tube etc.
Background technology
As the parts for making tubular cast of flow-path tube etc., the applicant has proposed to open the technology of putting down in writing in the 2004-174605 communique following spy when making foundry goods.This technology is that the paper tube that will contain organic fiber, inorfil and adhesive is configured as tubulose with body paper, and this technology is compared with employed refractory material all the time, and light weight and easy operating and the aspects such as offal treatment after the foundry goods casting are also excellent.
But, when above-mentioned member for producing castings being embedded in roughing sand or solidifying in the molding sand such as sand when constituting casting mold, sometimes the moisture of molding sand or solvent-saturated in this member for producing castings, thereby cause intensity to descend, and infringement casting mold.In addition, owing to contain, when processing or formation casting mold, be difficult to operation to skin rigid inorganic fiber excitatory.Therefore, water or solvent are difficult to soak into and the member for producing castings of easy operating enjoys expectation.
Summary of the invention
The invention provides a kind of parts for making tubular cast, have water proofing property paper tube layer at the outermost layer of these parts, and have the hear resistance paper tube layer that contains inorfil, organic fiber and heat-curing resin in the inboard of this water proofing property paper tube layer.
Description of drawings
Fig. 1 is a stereogram of schematically representing one embodiment of the invention.
The specific embodiment
The present invention relates to that water or solvent are difficult to soak into and the parts for making tubular cast of easy operating.
Below to the present invention will be described according to the preferred embodiments of the invention.
As shown in fig. 1, the parts for making tubular cast 10 of the present embodiment has water proofing property paper tube layer 11 at its outermost layer, and has the hear resistance paper tube layer 12 that constitutes around two the paper tube layers 121,122 that obtain with paper roll by with the hear resistance paper tube in the inboard of water proofing property paper tube layer 11.
Water proofing property paper tube layer 11 is by based on organic fiber and have the common paper of water proofing property or be that main functions paper constitutes with the inorfil.Wherein, so-called is that main body is meant with organic fiber or inorfil, with respect to all solids composition quality that is contained, contains 50% above organic fiber or inorfil.
In water proofing property paper tube layer 11, except containing organic fiber or inorfil, can also contain the coating agent that is used to embody water proofing property described later, to the sizing agent of the imparting water repellency of body paper own, the PVA (polyvinyl alcohol), polyethylene, polypropylene, PET chemical fibres such as (PETs), powder adhesives etc. that also can contain in addition, one or two or more kinds.
Preferred above-mentioned organic fiber as constituting water proofing property paper tube layer 11 can list paper pulp fiber, synthetic fibers (for example nylon, polyester fiber etc.), regenerated fiber (for example artificial silk, fiber etc.) etc.Organic fiber can use separately or select to use more than two kinds.
Preferred above-mentioned inorfil as constituting water proofing property paper tube layer 11 can list slag fibres such as metallic fiber, cinder-fibre such as mineral fibres such as carbon fiber, glass fibre, asbestos, gold thread, silver-colored line, copper cash, steel fibre etc.Inorfil can use separately or select to use more than two kinds.
Water proofing property paper tube layer 11 has water proofing property.This water proofing property is based on above-mentioned waterproofing agent (coating agent, sizing agent etc.) and embodies.For this water proofing property, if consider to prevent that this foundry goods from descending with the intensity of parts, then water absorption rate (suction quality/foundry goods with the preceding quality of the suction of parts) is preferably below 50%, and more preferably 10%.Wherein, the water absorption rate that had of water proofing property paper tube layer 11 according to for example with JIS P 8140 represented, " the absorption of water test method of paper and cardboard (Cobb method) " measure.Wherein, above-mentioned water absorption rate is the value when time of contact of test film and water being 10 seconds.
The thickness of water proofing property paper tube layer 11 is that 0.01～2.0mm is suitable, if still consider formability, intensity when being configured as coil pipe, then thickness is preferably 0.03～1.5mm, more preferably 0.05～1.0mm.In addition, for thin and flatly glass fibre, carbon fiber etc. are launched and with the functional paper that adhesive is reinforced, exist the fiber of rigidity such as carbon fiber directly to bring the situation of stimulation such as pain by hole (interfibrous space) from internal layer to human skin.Therefore, wish that water proofing property paper tube layer is the paper that does not have through hole.Here so-called do not have through hole to be meant, in order to prevent above-mentioned stimulation, and the hole that connects to the back side from the surface of functional paper not, even perhaps under porose situation, the hole is not empty on straight line; Perhaps the maximum diameter of hole is below the 7 μ m, so that fiber can not be exposed to the outside.This is because the average diameter of carbon fiber is 7 μ m.In addition, also same as described above based on the common paper of organic fiber, wish not have the paper of through hole in order to prevent to stimulate.That is, preferably: the hole that connects to the back side from the surface of common paper not, even perhaps under porose situation, the hole is not empty on straight line; Perhaps the maximum diameter of hole is below the 7 μ m, so that make fiber can not be exposed to the outside.Particularly, with respect to the many common paper in interfibrous spaces such as japanese traditional paper, more preferably be arranged to aforesaid paper.
Here, so-called common paper is the following definition that is defined as according to the paper of JIS regulation and cardboard.So-called common paper is meant, " paper that organic fiber, string, other fiber is made after adhering form or be paper that raw material manufacturing form with wood pulp, waste paper etc. ".
On the other hand, called function paper is the paper that manufacturings such as mixing such as glass fibre, synthetic high polymer material, inorganic material are formed, and is the paper with character (hear resistance, high rigidity etc.) that common paper do not have.
In addition, if above-mentioned waterproofing agent is added in the paper making raw material,, be not limited in functional paper so have the paper of water proofing property even then common paper also can show resistance to water.
Object lesson as water proofing property paper tube layer 11, cardboards such as the corrugated board body paper that can consider wood pulp, chemical pulp, wood fragments paper pulp, rice straw paper pulp, waste paper etc. are mixed, manila board, white board, be the chemical fiber paper of raw material and common good quality paper, printing, brown paper etc. with chemical fibres such as artificial silks, if but consider the price of body paper, the easiness of acquisition, can list brown paper.Wherein, so-called brown paper is meant, is the paper of raw material with the kraft pulp that comprises JIS P 3401 brown paper and JIS P 3412 ox-hide stretching paper.In addition, consider that from the easiness of price, acquisition side outermost layer preferably uses common paper, but, then can be any if having the paper of water proofing property.For example also can be to being scattered in that mineral wool in the water or carbon fiber etc. carry out papermaking, dehydration and directly be blown into adhesive in the material that forms and the functional paper made.
If be considered as the intensity of member for producing castings and the tolerance of the dynamic pressure when motlten metal flowed, then the thickness of hear resistance paper tube layer 12 is preferably more than the 0.5mm especially for being preferably more than the 0.3mm.
The paper tube layer 121,122 that constitutes hear resistance paper tube layer 12 contains inorganic powder, inorfil, organic fiber, heat-curing resin, binder for papermaking and waterproofing agent.
The hear resistance paper tube layer of the present embodiment is with respect to above-mentioned inorganic powder, inorfil, organic fiber, heat-curing resin, the gross mass of binder for papermaking and waterproofing agent, the mixing ratio of each composition (quality ratio) is: inorganic powder/inorfil/organic fiber/heat-curing resin (solid constituent)/binder for papermaking (solid constituent)/waterproofing agent=0～70%/1～60%/1～40%/1～40%/1～10%/0～5% (quality ratio), be preferably 40～70%/1～10%/1～25%/1～25%/1～10%/0～5% (quality ratio), more preferably 50～70%/1～8%/1～20%/10～25%/3～7%/0～1% (quality ratio).In addition, the content ratio of above-mentioned each composition adds up to 100%.If the mixing ratio of inorganic powder is in above-mentioned scope, the shape retention when then casting, the superficiality of formed products are good, and the release property after being shaped is also suitable.If the mixing ratio of inorfil is in above-mentioned scope, the shape retention when then papermaking, casting is good.If the mixing ratio of organic fiber is in above-mentioned scope, then papermaking is good, and owing to can reduce the burning gases generation in when casting, so can suppress blowback (adverse current of motlten metal).If the mixing ratio of heat-curing resin is in above-mentioned scope, then shape retention, the surface smoothing after the formability of casting mold, the casting is good.If the papermaking adhesive in above-mentioned scope, then can make the powder composition in the raw material adhere to mutually with fiber, and also can suitably twine between the fiber, and form the floc sedimentation that is suitable for papermaking most, qualification rate is also good.If when the body paper that the mixing ratio of waterproofing agent in above-mentioned scope, is then made by papermaking was made member for producing castings, employed bonding agent can not penetrate in the body paper, and can realize with the use amount of an amount of bonding agent.In addition, when imbedding member for producing castings in the molding sand, the moisture in the molding sand can not be impregnated in the member for producing castings.In addition, the environment for use of hear resistance paper tube layer is a drying regime sometimes, and perhaps heat-curing resin shows water proofing property according to kind and its use amount of above-mentioned heat-curing resin, and also can not add waterproofing agent this moment.
As above-mentioned inorganic powder, can list graphite such as obsidian, mullite, tabular graphite, amorphous graphite etc.Inorganic powder can use separately or select to use more than two kinds.The carbon amount of foundry goods is 4.2% when following, produces carburizing phenomenon (phenomenon that carbon is absorbed, becomes fragile by foundry goods).
At this moment, in order to prevent carburizing phenomenon, need to use the inorganic powder that contains the silica composition from the foundry goods carbide.As this inorganic powder, preferably use obsidian, mullite etc.In addition, the carbon amount of foundry goods is 4.2% when above, also can not contain inorganic powder.
Above-mentioned inorfil mainly forms the skeleton of above-mentioned hear resistance paper tube layer, for example, even owing to when casting motlten metal heat can not burn yet and keep its shape.As above-mentioned inorfil, can list man-made mineral fiber, ceramic fibre, natural mineral fibers such as carbon fiber, asbestos, these can use separately or select to use more than two kinds.Wherein, the viewpoint of the contraction that produces from the carbonization that can suppress effectively owing to above-mentioned heat-curing resin at high temperature also has high-intensity pitch class or polyacrylonitrile (PAN) based carbon fiber even preferably use, preferred especially PAN based carbon fiber.
Shaping easiness when above-mentioned inorfil forms after papermaking is above-mentioned hear resistance tube stock, the thickness of formed products are that the viewpoint of quality such as even is set out, and average fiber length is preferably 0.1～10mm, is preferably 3.0～6.0mm especially.Average fiber is long when surpassing 0.1mm, descends because fiber passes the probability of the mesh of wire-cloth, therefore can suppress fiber doping in plain boiled water and the decline of qualification rate.In addition, the intensity of resulting formed products also uprises.On the other hand, when average fiber length was lower than 10mm, formed products integral body was not bulk, and the formed products surface is difficult to form convex-concave, the good flowability of motlten metal in the time of can keeping casting.
As above-mentioned organic fiber, can list paper pulp fiber, synthetic fibers, regenerated fiber (for example rayon fiber) etc.Organic fiber can use separately or select to use more than two kinds.From the viewpoint of formability, dried intensity, cost, preferred paper pulp fiber.
As above-mentioned paper pulp fiber, can list other non-wood pulp such as wood pulp, cotton pulp, linter pulp, bamboo and rice straw.As paper pulp fiber, can use their magma (virgin pulp) or secondary stock separately, perhaps select to use more than two kinds.From viewpoints such as the easiness that obtains, environmental protection, reduction manufacturing expense, preferred especially old paper stock.
If consider surface smoothing, resistance to impact, the average fiber length of aforementioned organic fiber is preferably 0.1～20mm, is preferably 3～10mm especially.
Above-mentioned heat-curing resin is in the normal temperature strength and elevated temperature strength of keeping hear resistance paper tube layer 12, can make the superficiality of hear resistance paper tube layer reach good, and can improve the surface roughness of foundry goods, and setting out based on these viewpoints, above-mentioned heat-curing resin is necessary composition.
Wherein, particularly few from the burning gases that produce, have the inhibition combustion efficiency, the carbon residue rate after the thermal decomposition (carbonization) is up to more than 25%; set out by forming the viewpoint that the carbonization diaphragm obtains good cast(ing) surface when being used to cast, preferably use phenolic resins.Wherein, so-called carbon residue rate is meant, the sample of heat-curing resin is heated to 1200 ℃ with 50 ℃/minute programming rate from normal temperature under nitrogen atmosphere after, with the measured quality that obtains before divided by heating quality and the value that obtains.Because it is add and pine for discharging burning gases, so light before the heating of the mass ratio after the heating by heat-curing resin.As phenolic resins, can use the novolac resin that needs curing agent, the phenolic resins such as resol type that do not need curing agent.In order to suppress stripping free-phenol in the plain boiled water as far as possible, the preferred use hanged down the free phenol urea formaldehyde.For example, preferably with the resin of the HMW type of the synthetic resol type phenol resin of base catalyst or acidic catalyst.When using novolac resin, need curing agent.Because this curing agent is soluble in water, so preferably its surface is applied in body paper dehydration back.As above-mentioned curing agent, preferably use hexa etc.Above-mentioned heat-curing resin can use separately or select to use more than two kinds.
As above-mentioned papermaking adhesive, can list starch, gelatin, more latex, cataloid, the inorganic bond of this class of alumina type of the water-soluble synthetic high polymer of natural polymer, sponge (polyamidoamine epichlorohydrin resin), PVA (polyvinyl alcohol), PAM (polyacrylamide), this class of PEO (PEO) of sore glue, this class of CMC (carboxymethyl cellulose) and styrene-butadiene class, acrylonitrile-butadiene class, acrylic compounds, this class of vinylacetate class.Wherein, preferred especially sponge to the immobilization characteristic excellence of powder, CMC, the acrylic latex etc. of using.
As the sizing agent that shows above-mentioned water proofing property, can list synthetic classes such as natural class, AKD (alkyl ketene dimer), ASA (alkenyl succinic anhydrides) such as rosin and wax etc.Wherein, especially preferably in neutral region, keeps the water proofing property of excellence and compare acid resistance, AKD that alkali resistance is more excellent with rosin etc. with less amount.
In the paper tube layer 121,122 that constitutes hear resistance paper tube layer 12, except above-mentioned each composition, can also add other compositions such as agglutinant, colouring agent in accordance with the appropriate ratio.
The gross thickness of parts for making tubular cast 10 can suitably be set according to the place of its use, but consider the intensity guaranteed as member for producing castings, guarantee aeration, suppress manufacturing expense etc., gross thickness is preferably 0.5～6.0mm, more preferably 1.0～3.0mm.
Parts for making tubular cast 10 guaranteeing aspect the intensity, and the compressive strength under the state before being used to cast is preferably more than the 20N, more preferably more than the 40N.Wherein, the compressive strength of parts for making tubular cast is meant, the formed products of tubulose is cut into long 60mm, be under the state of laterally placing with the cut surface, compressive strength measuring appliance by テ Application シ ロ Application universal testing machine (エ of Co., Ltd. one ア Application De デ イ make RTA500) etc., compression speed with 10mm/ minute is pushed, the compressive strength of the pipe side that records therefrom.
When parts for making tubular cast 10 contacted with motlten metal, from the viewpoint of the generation that suppresses steam as far as possible, the moisture content (weight moisture capacity) of the state before being used to cast was preferably below 20%, more preferably below 10%.This is because the generation of steam is owing to the inflow entrance blowback (adverse current) from motlten metal produces.
Below, the preparation method of parts for making tubular cast 10 is described.
Make the common paper and the hear resistance paper tube body paper of the body paper that becomes water proofing property paper tube layer 11 and hear resistance paper tube layer 12 at first, respectively.
These body paper are made by following method: modulation makes above-mentioned each composition that constitutes above-mentioned water proofing property paper tube layer and above-mentioned hear resistance paper tube layer be distributed to the raw material slurry that forms in the dispersant respectively, carry out papermaking, dehydration, drying by these raw material slurries by the wet type paper process, thereby make above-mentioned body paper.
As above-mentioned dispersant, except water, plain boiled water, can also list ethanol, methyl alcohol equal solvent etc.And wherein the stability of the stability that is shaped from papermaking and dehydration, quality, reduction expense, viewpoint such as simple to operate are preferably water.
In the aforementioned base materials slurry, can add additives such as agglutinant, anticorrisive agent.
Use the raw material slurry of modulation as mentioned above, papermaking becomes each paper tube layer body paper.
As the method for the papermaking of body paper, can adopt papermaking process such as the cylinder mould machine that for example uses as papermaking mode continuously, fourdrinier machine, short net paper machine, two-wire (paper) machine, as the known papermaking process such as hand papermaking method of batch-type papermaking process.
Then, at drying process above-mentioned each body paper through dehydration is carried out drying.As drying, can use the common method of all the time in the drying of paper, using at drying process.In addition, in order firmly to improve the mechanical strength of each body paper by interfibrous hydrogen bond is become, preferably making this each body paper carry out drying, is below 30%, to be preferably below 10% up to moisture content.
Then, resulting each body paper is cut into Rack, carries out coil pipe processing.Coil pipe processing can be used the method for all the time using.At first, with the hear resistance paper tube with body paper along coil pipe processing the peripheral overlapping helical form that is wound as with axle, thereby be configured as tubular, outside it again with the hear resistance paper tube with the overlapping helical form that is wound as of body paper, thereby form hear resistance paper tube layer.Then, become the above-mentioned common paper of outermost water proofing property paper tube layer at its overlapping coiling in outside.The coiling direction that constitutes the body paper of adjacent layer can be to the overlapping coiling of equidirectional, also can be to the overlapping coiling of different directions.Under the situation of equidirectional, preferably according to carrying out overlapping coiling becoming the mode that the seam portion of before having carried out the body paper of overlapping coiling covers.Use suitable bonding agent during overlapping coiling and be configured as tubular.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 (intensity of the pressure when sand mold is made in tolerance) of foundry goods.
After the overlapping coiling of all layers is finished, under set point of temperature, carry out heat drying, and cutting processing is the size of regulation, thereby finishes the manufacturing of parts for making tubular cast.
As described above, the member for producing castings of the present embodiment is owing to have water proofing property paper tube layer at outermost layer, so even when it being embedded in constitute casting mold in the molding sand, also can prevent the moisture of molding sand or soaking into of solvent.Thus, can prevent owing to the descend damage of the casting mold that causes of the intensity of member for producing castings.In addition, because outermost layer forms by above-mentioned water proofing property paper tube layer, therefore the stimulation to skin is also few, also easy operating in cutting processing or when assembling casting mold.
In addition, because member for producing castings of the present invention light weight same and can easily carry out cutting processing etc. by simple device, therefore operability is also excellent in this.
The present invention is not limited to above-mentioned embodiment, can carry out appropriate change in the scope that does not break away from purport of the present invention.
In the above-mentioned embodiment, constitute hear resistance paper tube layer 12 with two paper tube layers, constitute water proofing property paper tube layer with a paper tube layer, but also can constitute hear resistance paper tube layer, also can constitute water proofing property paper tube layer with plural paper tube layer with the paper tube layer more than or three.From tolerating the dynamic pressure of casting during motlten metal, can preventing the leakage from the motlten metal of winding part, the viewpoints such as pressure when tolerating this parts for making tubular cast and being embedded in the sand, each paper tube layer all is preferably multilayer.But, for these layers structure, the manufacturing cost of the dynamic pressure of motlten metal, the pressure when this parts for making tubular cast is embedded in the sand, this parts for making tubular cast, the generation of burning gases in the time of can considering to cast, and as required and suitably set, each paper tube layer is not limited to be made of multilayer, and each paper tube layer also can be 1 layer.
Embodiment
Below, further the present invention is carried out more specific description according to embodiment.In addition, the present invention is not subjected to the restriction of present embodiment at all.
[embodiment 1]
Make the parts for making tubular cast of three-decker as shown in Figure 1 of body paper and common paper by following hear resistance paper tube layer.Then, to resulting parts for making tubular cast, estimate its surperficial water proofing property, intensity, to the excitant of skin.These be the results are shown in the table 1.
[constituent material of parts for making tubular cast]
Hear resistance paper tube layer body paper:
Inorganic powder: obsidian (Na イ ス キ ャ ッ チ Off ラ ワ one #330 that KINSEIMATEC company makes) 57.3 quality %
Inorfil: carbon fiber (the パ イ ロ Off イ Le TR03CM that Mitsubishi Chemical Ind makes)
7.2 quality %
Organic fiber: paper pulp fiber (recycled waste paper) 11.5 quality %
Heat-curing resin: phenolic resins (resol type) (the ベ Le パ one Le S890 that エ ア ウ オ one one company makes) 17.5 quality %
Binder for papermaking: sponge 3.0 quality %
Binder for papermaking: CMC 3.0 quality %
Waterproofing agent: alkyl ketene dimer 0.3 quality %
Agglutinant (Sanyo changes into the サ Application Off ロ Star Network that company makes) 0.2 quality %
(above raw material adds up to 100 quality %)
Common paper: (paper thickness is 0.2mm to commercially available brown paper, and the Unit Weight of paper is 64g/m
2, water proofing property: increase below 10% by Cobb test method(s) weight)
Bonding agent: phenolic resins emulsion (PR-51464 that ベ one Network ラ イ ト company in Sumitomo makes)
[form of parts for making tubular cast]
Respectively hear resistance paper tube layer is cut into the wide 101mm of being, 102.5mm with body paper, common paper is cut into the wide 104mm of being, mode according to the seam that covers lower floor separately, use body paper as ground floor along the long hear resistance paper tube layer of the overlapping coiling of axle of external diameter φ 70 for 101mm, the long hear resistance paper tube layer for 102.5mm of overlapping coiling uses body paper as the second layer, the common paper that overlapping coiling length is 104mm is as the 3rd layer, coating adhesive on the second layer, the 3rd layer simultaneously, thus the parts for making tubular cast of following form made.(outermost layer is a common paper)
Gross thickness is: 1.9mm (hear resistance paper tube layer thickness is 1.7mm, and the thickness of common paper tube layer is 0.2mm)
Internal diameter: φ 70
Length: 1000mm
[comparative example 1]
By coiling thickness is that the common paper that does not have water proofing property of 0.2mm replaces the 3rd layer of common paper with water proofing property among the embodiment 1, makes the parts for making tubular cast of following form.Then, to resulting parts for making tubular cast,, estimate its surperficial water proofing property, intensity according to the method identical with embodiment 1, to the excitant of skin.These be the results are shown in the table 1.
Gross thickness is: 1.9mm (hear resistance paper tube layer thickness is 1.7mm, and the thickness with absorptive common paper tube layer is 0.2mm)
Internal diameter: φ 70
Length: 1000mm
[comparative example 2]
The porous glass fibrous paper (オ リ ベ ス ト Co., Ltd. make グ ラ バ ス ト SB-030) that is about 0.2mm and has a water proofing property by coiling thickness replaces the 3rd layer common paper among the embodiment 1, makes the parts for making tubular cast of following form.Then, to resulting parts for making tubular cast,, estimate its surperficial water proofing property, intensity according to the method identical with embodiment 1, to the excitant of skin.These be the results are shown in the table 1.
Gross thickness is: 1.9mm (hear resistance paper tube layer thickness is 1.7mm, and the thickness with absorptive hear resistance paper tube layer is 0.5mm)
Internal diameter: φ 70
Length: 1000mm
[evaluation of compressive strength]
With the above-mentioned measuring method measurement embodiment 1 and the compressive strength of comparative example 1,2, consequently, the compressive strength of each example all is about 40N, and roughly the same.
[evaluation of water proofing property]
Coupon is cut into widely solidifies in the sand for 300mm and with the furane resins that the degree of depth of 100mm is embedded to following composition, place dug out again in 5 minutes after, to the sample of moistened surface according to zero (well), * (bad) these two ranks estimate their situation.
＜furane resins solidify the composition of sand 〉
Molding sand: furane resins reclaimed sand
Furane resins: flower king ラ イ ト Na one 340B (Kao Corp's system), addition 0.7 quality % (with respect to sand)
Curing agent: flower king ラ イ ト Na one curing agent C14 (Kao Corp's system), addition 50 quality % (with respect to resin)
[evaluation of intensity]
For with evaluation the same terms of water proofing property under the coupon imbedded, reproduce the on-the-spot molding operation of casting, and be that the operator of 68kg tramps with one's feet and steps on the body weight, carry out back-up sand, dig out then, to outward appearance and damaged situation according to zero (well), * (bad) these two ranks estimate.
[to irritating evaluation of skin]
With empty-handedly carrying out coupon molding operation (will solidify the test wooden die of sintering in the sand and this sample vertical tube (long 500mm), this sample horizontal tube (long 300mm) according to the moulding of rising pouring scheme) then at above-mentioned furane resins, the symptom that skin is occurred according to zero (less than stimulation), * (stimulation is arranged) these two ranks estimate.
[table 1]
| Water proofing property | Intensity | Excitant to skin | |
| Embodiment 1 | Do on the surface, and sand does not adhere to zero yet | Do not observe distortion, damaged zero | Do not stimulate zero |
| Comparative example 1 | Surface wettability, sand also have more adhering to * | From the seam of ground floor begin breakage * | Do not stimulate zero |
| Comparative example 2 | Some sand on the surface, but do zero | Do not observe distortion, damaged zero | Have stimulation * |
As shown in table 1, if comparing embodiment 1 and comparative example 1 even intensity is identical before the moulding, but owing to do not have water proofing property and moisture absorption at the outermost layer of the coupon of comparative example 1, begin to produce damaged from seam.In addition, if comparing embodiment 1 and comparative example 2 even use the paper with identical water proofing property at outermost layer, because paper is porous matter, also stimulates skin from the carbon fiber of the rigidity of internal layer, and confirm to have pain.Hence one can see that, the coiling of embodiment 1 to have parts of common paper of water proofing property more excellent than other comparative example 1, comparative example 2.
According to parts for making tubular cast of the present invention,,, also can prevent to descend and the breakage that produces by intensity even in being embedded in molding sand and when constituting casting mold because moisture or solvent be difficult to soak into.In addition, owing to skin is not had excitant, easy operating.
Parts for making tubular cast of the present invention goes for constituting the tubular part of casting mold.
Claims (6)
1. parts for making tubular cast has water proofing property paper tube layer at the outermost layer of these parts, and has the hear resistance paper tube layer that contains inorfil, organic fiber and heat-curing resin in the inboard of this water proofing property paper tube layer.
2. according to the parts for making tubular cast of claim 1 record, wherein in described hear resistance paper tube layer, contain inorganic powder.
3. according to the parts for making tubular cast of claim 1 or 2 records, wherein said water proofing property paper tube layer is by being that main functions paper constitutes based on the common paper of organic fiber or with the inorfil.
4. according to the parts for making tubular cast of each record in the claim 1～3, wherein said hear resistance paper tube layer is made of with body paper two-layer at least hear resistance paper tube.
5. according to the parts for making tubular cast of each record in the claim 1～4, wherein said water proofing property paper tube layer is made of brown paper.
6. according to the parts for making tubular cast of each record in the claim 2～5, wherein constituting described hear resistance paper tube is respectively obsidian, carbon fiber, paper pulp fiber and phenolic resins with the described inorganic powder of body paper, described inorfil, described organic fiber and described heat-curing resin.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP346812/2005 | 2005-11-30 | ||
| JP2005346812A JP4749138B2 (en) | 2005-11-30 | 2005-11-30 | Tubular casting parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1974058A true CN1974058A (en) | 2007-06-06 |
| CN1974058B CN1974058B (en) | 2010-12-22 |
Family
ID=38124571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006101439416A Expired - Fee Related CN1974058B (en) | 2005-11-30 | 2006-11-07 | Parts for making tubular cast |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP4749138B2 (en) |
| KR (1) | KR101291927B1 (en) |
| CN (1) | CN1974058B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102154900A (en) * | 2011-01-19 | 2011-08-17 | 安徽虹光企业投资集团有限公司 | Preparation method of anti-static carbon fibre corrugated paper |
| CN105364014A (en) * | 2015-10-29 | 2016-03-02 | 张新平 | Paper pouring gate pipe for casting and manufacturing method of paper pouring gate pipe |
| CN106747522A (en) * | 2017-01-16 | 2017-05-31 | 宝鸡华光铸造材料科技有限公司 | A kind of cast steel casting paper runner channel duct member |
| CN113584949A (en) * | 2021-06-24 | 2021-11-02 | 中船澄西船舶修造有限公司 | Pipe orifice protective sleeve and preparation method thereof |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104943243A (en) * | 2015-06-19 | 2015-09-30 | 姚伟 | Preparation process of paper pouring earthenware pipe |
| EP3816347A4 (en) * | 2018-06-27 | 2022-03-23 | Nippon Paper Industries Co., Ltd. | Paper tube base paper and paper tube |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS511286Y1 (en) * | 1970-12-21 | 1976-01-16 | ||
| JPS55116751U (en) * | 1979-02-13 | 1980-08-18 | ||
| JP4471629B2 (en) * | 2002-11-13 | 2010-06-02 | 花王株式会社 | Manufacturing method of parts for casting production |
| JP3995649B2 (en) * | 2002-11-29 | 2007-10-24 | 花王株式会社 | Molds or structures for casting production |
-
2005
- 2005-11-30 JP JP2005346812A patent/JP4749138B2/en not_active Expired - Fee Related
-
2006
- 2006-10-31 KR KR1020060106352A patent/KR101291927B1/en active IP Right Grant
- 2006-11-07 CN CN2006101439416A patent/CN1974058B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102154900A (en) * | 2011-01-19 | 2011-08-17 | 安徽虹光企业投资集团有限公司 | Preparation method of anti-static carbon fibre corrugated paper |
| CN102154900B (en) * | 2011-01-19 | 2012-10-31 | 安徽虹光企业投资集团有限公司 | Preparation method of anti-static carbon fibre corrugated paper |
| CN105364014A (en) * | 2015-10-29 | 2016-03-02 | 张新平 | Paper pouring gate pipe for casting and manufacturing method of paper pouring gate pipe |
| CN106747522A (en) * | 2017-01-16 | 2017-05-31 | 宝鸡华光铸造材料科技有限公司 | A kind of cast steel casting paper runner channel duct member |
| CN113584949A (en) * | 2021-06-24 | 2021-11-02 | 中船澄西船舶修造有限公司 | Pipe orifice protective sleeve and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20070056938A (en) | 2007-06-04 |
| CN1974058B (en) | 2010-12-22 |
| KR101291927B1 (en) | 2013-07-31 |
| JP2007152357A (en) | 2007-06-21 |
| JP4749138B2 (en) | 2011-08-17 |
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