WO2003076104A1 - Partie preparee au moyen d'un procede de fabrication de feuille utilise pour produire des produits moules et son procede de preparation - Google Patents
Partie preparee au moyen d'un procede de fabrication de feuille utilise pour produire des produits moules et son procede de preparation Download PDFInfo
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- WO2003076104A1 WO2003076104A1 PCT/JP2003/002792 JP0302792W WO03076104A1 WO 2003076104 A1 WO2003076104 A1 WO 2003076104A1 JP 0302792 W JP0302792 W JP 0302792W WO 03076104 A1 WO03076104 A1 WO 03076104A1
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- Prior art keywords
- binder
- papermaking
- fiber
- producing
- organic
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Classifications
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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
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/167—Mixtures of inorganic and organic binding agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C19/00—Components or accessories for moulding machines
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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
- B22C9/046—Use of patterns which are eliminated by the liquid metal in the mould
-
- 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
-
- 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
- B22C9/082—Sprues, pouring cups
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
Definitions
- the present invention relates to a papermaking part for animal production and an animal production method using the same.
- fish sand In the production of fish, in general, fish sand is used to form a mold having a cavity (core if necessary) inside, and a receiving port, a sprue, a runner and a weir (hereinafter referred to as a spout) for supplying molten metal to the cavity. These are also referred to as a pouring system.) Are formed so as to communicate with the cavity, and further, venting, feeding water, and frying are formed. Such a pouring system, degassing, hot water, and frying are usually formed integrally with ⁇ using sand, or the pouring system is made of fire-resistant materials such as pottery and metal. It is formed using constituent members.
- the heat insulating material is formed by mixing an organic or inorganic fiber and an organic or inorganic binder, when the organic fiber and the organic binder are combined, the heat generated when the molten metal is supplied. There was a problem that the molten metal leaked from the pouring system, etc. due to the shrinkage of the pouring system due to the thermal decomposition of the heat insulating material. Further, when inorganic fibers and an inorganic binder are combined, it is difficult to form the heat insulating material into a three-dimensional shape such as a hollow shape or a shape having a fitting structure, etc. A corresponding pouring system could not be formed.
- a technique using a core produced by adding an inorganic powder and / or an inorganic fiber to a cellulose fiber is also known (for example, see Japanese Patent Application Laid-Open No. Hei 9-325792). Since the core contains the inorganic powder or the inorganic fibers, shrinkage of the core during drying is suppressed when the core is manufactured. In addition, the use of the core reduces the amount of gas or tar-like polymer compound generated from the cellulose fibers during production, reduces production defects, and improves workability during production.
- the core obtained with this technique has the above advantages but does not include binders. Therefore, this core cannot be applied to the formation of a pouring system or the like corresponding to various cavity shapes, including a hollow runner or the like.
- an object of the present invention is to provide a papermaking part for producing a material which is capable of suppressing heat shrinkage due to thermal decomposition and capable of forming a pouring system or the like corresponding to various cavities and having excellent handleability. It is an object of the present invention to provide a method for producing animals using the same. Disclosure of the invention
- the present invention has achieved the above object by providing a papermaking part for producing a product, which contains an organic fiber, an inorganic fiber and a binder. Further, the present invention relates to a method for producing a product using a papermaking part for producing a substance, comprising an organic fiber, an inorganic fiber and a binder, wherein the papermaking part for producing a substance is placed in a substance sand. It is intended to provide a method of manufacturing a product.
- the present invention provides the method for producing a papermaking part for producing a product according to the present invention, comprising the steps of: forming a molded article from a raw material slurry containing the organic fibers and the inorganic fibers; And a step of including the binder in a body.
- FIG. 1 is a half sectional view schematically showing an embodiment in which a papermaking part for producing a product of the present invention is applied to a runner for a gate.
- FIG. 2 is a schematic half cross-sectional view of the intermediate molded body of the embodiment.
- FIG. 2 (a) is a diagram showing a state before cutting
- FIG. 2 (b) is a diagram showing a state after cutting.
- FIG. 3 is a perspective view schematically showing a state in which the component for manufacturing a product of the present invention is arranged.
- FIG. 4 is a cross-sectional view schematically showing a connected state of another embodiment of the papermaking part for producing a product of the present invention.
- the papermaking part for producing a product of the present invention comprises an organic fiber, an inorganic fiber and a binder. It contains.
- the organic fiber forms a skeleton before being used for production in a papermaking part for producing a product, and at the time of production, part or all of the organic fiber is burned by heat of a molten metal.
- a void is formed inside the papermaking part.
- the organic fibers include, in addition to paper fibers, fibrillated synthetic fibers and regenerated fibers (for example, rayon fibers). These may be used alone or in combination of two or more. Of these, paper fibers are preferred.
- paper fiber is easily available and stable, the production cost of the molded article is reduced, it can be formed into various forms by papermaking, and the dewatered and dried molded article has sufficient strength. is there.
- the paper fiber wood pulp, cotton pulp, linter pulp, bamboo, straw or other non-wood pulp can be used.
- Pergin pulp or waste paper pulp (recovered product) can be used alone or in combination of two or more. Waste paper pulp is particularly preferred from the viewpoints of easy availability, stability, environmental protection, and reduction of manufacturing costs.
- the average fiber length of the organic fibers is preferably 0.8 to 2.0 mm, more preferably 0.9 to 1.8 mm.
- the content of the organic fiber is preferably from 10 to 70 parts by weight, more preferably from 20 to 60 parts by weight. In this specification, parts by weight mean a value with respect to a total of 100 parts by weight of the organic fiber, the inorganic fiber and the binder.
- the content of the organic fiber is too small, the formability of the paper-made part is deteriorated due to a shortage of organic fibers constituting a skeleton of the paper-made part, and the strength of the paper-formed part after dehydration or drying is reduced. If it is too large, a large amount of combustion gas will be generated at the time of pouring, causing blow-back from the gate or frying. (The thin rod-shaped air gap provided at the top of the The flame may come out violently from the part that rises to the top of the mold after filling the mold, and the manufacturing cost may increase depending on the fiber used.
- the inorganic fiber mainly forms a skeleton before being used for manufacturing in a papermaking part for manufacturing a product, and maintains its shape without burning even by heat of a molten metal during manufacturing.
- the inorganic fibers can suppress thermal shrinkage caused by thermal decomposition of the organic binder due to heat of the molten metal.
- the inorganic fibers include carbon fibers, artificial mineral fibers such as rock wool, ceramic fibers, and natural mineral fibers, and these may be used alone or as a mixture of two or more. Among these, it is preferable to use carbon fibers having high strength even at high temperatures from the viewpoint of suppressing the heat shrinkage.
- the average fiber length of the inorganic fibers is preferably from 0.2 to 10 mm, more preferably from 0.5 to 8 mm. If the average fiber length of the inorganic fibers is too short, drainage may be reduced, and poor dewatering may occur during the production of a papermaking part. In addition, when manufacturing thick paper-made parts (particularly, hollow three-dimensional objects such as bottles), the paper-making properties may decrease. On the other hand, if the average fiber length of the inorganic fibers is too long, it may not be possible to obtain a paper part having an even thickness, and it may be difficult to produce a hollow paper part.
- the content of the inorganic fibers is preferably 1 to 80 parts by weight, more preferably 4 to 40 parts by weight. If the content of the inorganic fiber is too small, the strength of the paper-made component manufactured using an organic pinner, particularly when it is manufactured, decreases. Due to the carbonization, shrinkage, cracking, and peeling of the wall surface of the papermaking part (a phenomenon in which the wall surface of the papermaking part separates into an inner layer and an outer layer) may occur. In addition, defective products may be produced by mixing part of the papermaking parts or natural sand into the product (animal).
- the ratio of the inorganic fiber to the organic fiber is, for example, 0.15 to 50, preferably 0.25 when the inorganic fiber is carbon fiber. ⁇ 30 is more preferable.
- the inorganic fiber is rock wool, it is preferably from 10 to 90, and more preferably from 20 to 80.
- the binder include an organic binder and an inorganic binder as described later.
- the organic binder and the inorganic binder can be used alone or in combination.
- the organic binder may be added to the raw material slurry of the papermaking part, or may be impregnated into the manufactured papermaking part.
- the binder When added to the raw slurry, the binder binds the organic fibers and the inorganic fibers when the papermaking part is dried, and a high strength papermaking part is obtained.
- the papermaking part When impregnated into the papermaking part, the papermaking part is dried and the binder is cured, and the heat of the molten metal at the time of filling causes the binder to carbonize and the strength of the papermaking part is maintained at the time of filling. .
- the organic binder examples include a phenol resin, an epoxy resin, and a Thermosetting resin such as resin. Among them, it is particularly preferable to use a phenol resin from the viewpoint that the generation of combustible gas is small, the effect of suppressing combustion is high, and the residual carbon ratio after pyrolysis (carbonization) is high.
- a phenol resin a nopolak phenol resin which requires a curing agent as described later, and a phenol resin such as a resol type which does not require a curing agent are used.
- the organic binders may be used alone or in combination of two or more.
- the inorganic binder binds the organic fibers and the inorganic fibers when a part formed before drying is formed by drying, and has an effect of remaining during filling and suppressing the generation of combustion gas and flame.
- the inorganic binder examples include compounds containing SiO 2 as a main component, such as colloidal silica, obsidian, perlite, ethyl silicate, and water glass. Among these, it is particularly preferable to use colloidal silica in terms of being able to be used alone and being easy to apply. In view of the fact that it can be added to the raw material slurry and the point of preventing carburization, it is preferable to use obsidian.
- the inorganic binders may be used alone or in combination of two or more.
- the content of the binder (solid content) is preferably from 10 to 85 parts by weight, more preferably from 20 to 80 parts by weight.
- the content of the pinda is too low, pinholes may be generated in the formed part and the compressive strength of the formed part may be reduced.
- the strength of the paper-making parts may be insufficient at the time of pouring, and sand may be mixed into the product.
- the content of the binder is too large, the paper-made parts may be stuck to the mold during dry molding after the paper-making, which may hinder the separation of the paper-made parts from the mold.
- the content of the binder is preferably 10 to 70 parts by weight, more preferably 20 to 50 parts by weight.
- obsidian is used as the binder, it is preferable to include at least 20 parts by weight of obsidian in all the binders.
- the binder Only obsidian may be used as the binder.
- a hardening agent is required when a novolac phenol resin is used. Since the curing agent is easily soluble in water, it is preferable to apply the curing agent to the surface of the papermaking part after dehydration. Hexamethylene tetraamine is preferably used as the curing agent.
- the binder two or more binders having different melting points or different thermal decomposition temperatures can be used in combination. In particular, a low melting point binder and a high melting point are used from the viewpoint of maintaining the shape of the paper-made parts from before the normal temperature manufacturing to high temperature during the manufacturing and preventing carburization during the manufacturing.
- a binder having a melting point in combination.
- the low-melting binder clay, include water glass, obsidian and the like, is a high melting point of the binder, colloidal Darushirika, Wallace Tokyo DOO, mullite bets, A 1 2 O 3 and the like.
- combinations of binders having different melting points or thermal decomposition temperatures include a combination of obsidian and a phenol resin.
- the melting point of obsidian is between 1200 ° C and 130 ° C
- the thermal decomposition temperature of phenolic resin is about 500 ° C (based on the results of weight loss measurement (DTA) in nitrogen gas).
- the papermaking part for producing a product of the present invention may further include a paper strength reinforcing material in addition to the organic fibers, the inorganic fibers, and the binder.
- the paper-strengthening agent has an effect of preventing swelling of the intermediate molded product when the intermediate molded product of the papermaking component is impregnated with a binder (described later).
- the amount of the paper reinforcing material to be used is preferably 1 to 20%, particularly preferably 2 to 10% of the total weight of each fiber. If the strength of the paper is too small, the swelling prevention is insufficient. In some cases, the added powder may not be fixed to the fiber, and even if a large amount is added, the effect is not improved, and the molded body of the paper-made part may be easily attached to the mold.
- the paper-strengthening agent examples include polyvinyl alcohol, carboxymethyl cellulose (CMC), and polyamidoamine chlorohydrin resin.
- Components such as a flocculant and a colorant can be further added to the papermaking part for producing a product of the present invention.
- the thickness of the papermaking part for animal production can be set according to the purpose of use, etc., but at least the thickness of the portion in contact with the molten metal is preferably from 0.2 to 5 mm, more preferably from 0.4 to 3 mm. More preferred. If the thickness is too thin, the strength of the paper-made part will be insufficient, and it may be difficult to maintain the desired shape and function of the paper-made part due to the pressure of natural sand. If the thickness is too large, the air permeability is impaired, the raw material cost increases, and the molding time increases, which may increase the manufacturing cost.
- the papermaking part for manufacturing a product has a compressive strength before being used for manufacturing.
- the compressive strength is preferably at least 10 N, more preferably at least 30 N. If the compressive strength is too low, it may be deformed by being pressed by sand, which may impair its function as a papermaking part.
- the water content before use (before being subjected to production) of the papermaking part for producing a product is preferably 10% or less. It is preferably at most 8%. The reason is that the lower the water content, the lower the amount of gas generated due to the thermal decomposition (carbonization) of the organic binder during production.
- the specific gravity of the papermaking part for animal production before use is preferably l ⁇ 0 or less, and 0.1.
- the method for producing a papermaking part for producing a plastic according to the present invention will be described based on an example of a method for producing a papermaking part for producing a vegetable having a hollow inside.
- a raw material slurry containing the organic fibers, the inorganic fibers, and the binder at the predetermined ratio is prepared.
- the raw material slurry is prepared by dispersing the fibers and the binder in a predetermined dispersion medium.
- the binder may be impregnated into the molded body without being added.
- the dispersion medium include water, white water, and a solvent such as ethanol and methanol. Papermaking ⁇ Water is particularly preferred from the viewpoints of stability of dehydration molding, stability of molded product quality, cost, and ease of handling.
- the total ratio of the fibers to the dispersion medium in the raw slurry is preferably from 0.1 to 3% by weight, more preferably from 0.5 to 2% by weight.
- the molded product tends to have uneven thickness, and in the case of a hollow product, the inner surface may have poor surface properties. If the amount is too small, a locally thin portion may be generated in the molded body. Additives such as the paper-strengthening agent, coagulant, and preservative can be added to the raw material slurry as needed. Next, using the raw material slurry, an intermediate molded body of a papermaking part for manufacturing a product is formed.
- a cavity having a shape corresponding to the outer shape of the intermediate molded body is formed by butting a pair of split dies.
- a mold for dehydration molding is used.
- the A predetermined amount of raw material slurry is pressurized and injected into the cavity from the upper opening of the mold. Thereby, the inside of the cavity is pressurized to a predetermined pressure.
- Each split mold is provided with a plurality of communication holes for communicating the outside with the cavity, and the inner surface of each split mold is covered with a net having a mesh of a predetermined size. deep.
- a pressure pump is used for pressure injection of the raw material slurry.
- the pressure for pressurized injection of the raw slurry is preferably from 0.01 to 5 MPa, more preferably from 0.01 to 3 MPa.
- the dispersion medium in the raw material slurry is discharged out of the mold from the communication hole.
- solids in the raw slurry are deposited on the net covering the cavity, and a fiber laminate is uniformly formed on the net.
- the fiber laminate obtained in this way has a complicated shape and is high even after dry molding because the organic fiber and the inorganic fiber are intricately entangled with a binder interposed therebetween. Shape retention is obtained.
- the inside of the cavity is pressurized to a predetermined pressure, even when a hollow intermediate molded body is formed, the raw slurry flows in the cavity and the raw material slurry is stirred. Therefore, the slurry concentration in the cavity is made uniform, and the fiber laminate is uniformly deposited on the net.
- the pressure injection of the raw material slurry is stopped, and air is injected into the cavity to pressurize and dewater the fiber laminate. Thereafter, the press-in of the air is stopped, the inside of the cavity is sucked through the communication hole, and a core (elastic core) which is elastic, stretchable and hollow is inserted into the cavity.
- the core is made of urethane, fluorine-based rubber, silicone-based rubber, or elastomer having excellent tensile strength, rebound resilience and elasticity.
- a pressurized fluid is supplied into the core inserted into the cavity.
- the core is expanded, and the fiber core is pressed against the inner surface of the cavity by the expanded core.
- the fiber laminate is pressed against the inner surface of the cavity, the inner shape of the cavity is transferred to the outer surface of the fiber laminate, and dehydration of the fiber laminate proceeds.
- the pressurized fluid used to expand the core for example, compressed air (heated air), oil (heated oil), and other various liquids are used.
- the supply pressure of the pressurized fluid is preferably from 0.01 to 5 MPa in view of the production efficiency of the molded body, and particularly preferably from 0.1 to 3 MPa from the viewpoint of efficient production.
- the pressure is less than 0.01 MPa, the drying efficiency of the fiber laminate decreases, and the surface property and the transferability may be insufficient. If the pressure exceeds 5 MPa, the effect is not significantly improved. And the equipment becomes larger.
- the fiber laminate is pressed from the inside to the inner surface of the cavity, even if the shape of the inner surface of the cavity is complicated, the inner surface shape is accurately transferred to the outer surface of the fiber laminate. . Further, even if the molded body to be manufactured has a complicated shape, the bonding step of each part is not required, so that the joint obtained by bonding does not have a seam or a thick portion.
- the pressurized fluid in the core is drained, and the core is returned to its original state. Shrink to size. Then, the contracted core is taken out of the cavity, and the mold is opened to take out a wet fiber laminate having a predetermined moisture content. Pressing and dehydration of the fiber laminate using the core described above may be omitted as necessary, and the fiber laminate may be dewatered and formed only by pressurization and dehydration by pressurizing air into the cavity. The dehydrated fiber laminate is then transferred to a heating / drying step.
- a mold for dry molding in which a cavity having a shape corresponding to the outer shape of the intermediate molded body is formed. Then, the mold is heated to a predetermined temperature, and the dehydrated and molded wet fiber laminate is loaded into the mold. Next, a core similar to the core used in the papermaking step is inserted into the fiber laminate, and a pressurized fluid is supplied into the core to expand the core. The core presses the fiber laminate against the inner surface of the cavity. It is preferable to use a core surface-modified with a fluorine-based resin, a silicone-based resin, or the like. The supply pressure of the pressurized fluid is preferably the same pressure as in the dehydration step.
- the heating temperature (mold temperature) of the mold for dry molding is preferably 180 to 250 ° C, more preferably 180 to 250 ° C, for surface properties and drying time. More preferred. If the heating temperature is too high, the surface of the intermediate molded body may be deteriorated due to scorching, and if it is too low, drying of the intermediate molded body may take time.
- the pressurized fluid in the core is drained, and the core is shrunk and taken out of the fiber laminate. Then, the mold is opened, and the intermediate molded body is taken out.
- the obtained intermediate molded body can be partially or entirely impregnated with a binder, if necessary.
- binder to be impregnated into the intermediate molded body examples include resole type phenol resin, colloidal silica, ethyl silicate, and water glass. If the intermediate compact is impregnated with a binder and is not included in the raw slurry, the processing of the raw slurry and white water is simplified.
- the intermediate molded body After impregnation with the binder, the intermediate molded body is heated and dried at a predetermined temperature, and the binder is thermoset to complete the production. Since the thus obtained papermaking part is pressed by the elastic core, the inner surface and the outer surface have high smoothness. For this reason, molding accuracy is high, and a highly accurate papermaking part can be obtained even when the fitting part has a threaded part. Therefore, the papermaking parts connected by the fitting portion and the screw portion can reliably suppress the leakage of the molten metal, and the molten metal flows smoothly through the inside.
- the papermaking part for producing plastics of the present invention can be applied to, for example, a runner for a gate, as in the embodiment shown in FIG.
- reference numeral 1 indicates a runner.
- the runner 1 has two tubular members 11 and 12 connected by fitting.
- the upper opening 12a of the cylindrical member 12 is expanded by a predetermined length, and the inner surface of the distal end 12b is tapered (reverse taper) whose diameter gradually increases upward. Is provided. Therefore, fitting of the lower end opening of the member (the tubular member 11 in FIG. 1) as the connection partner can be facilitated, and the member can be securely fitted to a predetermined depth.
- the ratio of the diameter expansion of the opening 12a of the cylindrical member 12 is set such that the inner surfaces of the cylindrical members 11 and 12 are flush with each other.
- the tubular member 12 is bent horizontally downward, and a runner for runner (see FIG. 3) 3 is connected to the horizontal opening 12c.
- a cylindrical portion as shown in FIG.
- An intermediate molded body 10 which is integrally formed at the upper end of the tubular member 12 in a state where the material 11 is inverted and the horizontal opening 12 c is not opened is obtained by the manufacturing method. It is preferred to manufacture.
- the obtained intermediate molded body 10 is cut at predetermined cutting points (A and B in FIG. 2 (a)) as shown in FIG. 2 (b), and these are fitted together as shown in FIG.
- the sprue is connected to form a gate runner (bending part for papermaking) with a bent part (see Fig. 3).
- the runner 1 for the gate the runners 2, 3, and 4 for the pouring system such as a receiving port, a runner, and a weir, the runner 5 for degassing, and the hot water (top and side).
- the papermaking parts for food production consisting of the molds 9 having the runners 6 and 7, the runner 8 for frying and the cavities (not shown) are arranged at predetermined positions.
- these papermaking parts for producing a plastic are buried in a plastic sand, and a molten metal having a predetermined composition is guided into the cavity of the mold 9 through the pouring system.
- the binder (and the organic fiber) of the papermaking part of the present invention is thermally decomposed and carbonized by the heat of the molten metal, but has sufficient strength. Can be inherited.
- the inorganic fiber suppresses thermal shrinkage due to thermal decomposition, each runner is hardly cracked, and the papermaking part itself is hardly washed away. There is no.
- the organic fibers are thermally decomposed, it is easy to remove the papermaking parts after disassembling the mold and removing the animal product.
- Sand used in the production of this type of animal can be used without particular limitation as the animal sand. After completion of the installation, cool to a predetermined temperature to remove the animal sand, and then expose the artificial product by blasting. In addition, unnecessary parts such as the carbonized papermaking parts for carbon production such as a pouring system are removed. Then, if necessary, post-processing such as trimming is performed to complete the manufacture of the animal.
- the organic fibers are burned by the heat of the molten metal to form voids therein, and the strength is maintained by the inorganic fibers and the binder. After the mold is dismantled, it can be easily separated and removed from the sand by blasting or the like.
- the papermaking parts for the production of a product of the present invention use organic fibers, inorganic fibers and a binder, the strength is maintained at the time of molding and pouring of the mold, and after dismantling of the mold. Its strength decreases. Therefore, the method for producing a product using the papermaking part for producing a product according to the present invention is to simplify the disposal of the waste and reduce the treatment cost and the amount of the generated waste as compared with the conventional method. Can be.
- the paper-making parts can be more embedded than paper-made parts manufactured using only organic fibers.
- it can also prevent strength reduction due to burning out of the organic fibers and cracks due to heat shrinkage due to thermal decomposition (carbonization) of the organic binder. It is possible to prevent the occurrence of product defects due to mixing of material sand.
- the papermaking part for producing plastics of the present invention has air permeability, gas generated during pouring is released to the sand. Therefore, defects caused by so-called nests Product generation is prevented.
- the papermaking parts for animal production according to the present invention are light in weight and can be easily cut with a simple device, and thus are excellent in handleability.
- the present invention is not limited to the above-described embodiments, and can be appropriately modified without departing from the spirit of the present invention.
- the runner may be provided with a length adjusting means.
- this length adjusting means screw threads (male screw, female screw) corresponding to one inner surface and the other outer surface are provided in two parts to be connected, and the length is adjusted according to the degree of screwing.
- a bellows part is provided at the middle part in the longitudinal direction, and the length is adjusted by expansion and contraction of the bellows part.
- the papermaking part for animal production according to the present invention may be a T-shaped runner 1 ′ as shown in FIG. 4 in addition to the non-branched form as in the runner 1.
- the pouring route can be formed in various forms.
- the papermaking part for producing a fish according to the present invention includes runners for runners, weirs, vents, risers, and lifts as shown in FIG. It can also be applied to runners (not shown), ⁇ type itself or ⁇ type inner surface.
- the papermaking part for producing plastics of the present invention may be a tubular runner having a hot water pool.
- the basin exerts a filter effect and enables the production of a more pure product.
- a novolac type phenol resin is used, but a resole type phenol resin may be used.
- a runner by paper-making with a slurry not containing a phenolic resin of the resole type, and to impregnate the resin after dehydrating the runner. It is also possible to impregnate the phenolic resin with the phenolic resin and then heat-treat it after drying.
- the method for producing a substance of the present invention can be applied to the production of non-ferrous metals such as aluminum and its alloys, copper and its alloys, nickel, and lead, in addition to molten metal (iron).
- non-ferrous metals such as aluminum and its alloys, copper and its alloys, nickel, and lead, in addition to molten metal (iron).
- the fiber laminate After forming a predetermined fiber laminate using the following raw material slurry, the fiber laminate is dehydrated and dried, and has a shape shown in FIG. 2 (a) and has the following physical properties. A papermaking part for product production, weighing about 16 g ) was obtained.
- An organic fiber and an inorganic fiber having the following composition are dispersed in water to adjust a slurry of about 1% (the total weight of the organic fiber and the inorganic fiber is 1% by weight with respect to water).
- the following coagulant was added to adjust a raw material slurry in which the mixing ratio (weight ratio) of the organic fiber, the inorganic fiber, and the binder was as follows.
- Organic fiber used newspaper, average fiber length is lmm, freeness (hereinafter also referred to as CSF); ⁇ 150cc
- Inorganic fiber carbon fiber (Toray Industries, Inc., trade name "Tre-Riki Chop"), A fiber length of 3 mm) was applied to a beater to obtain a slurry of organic fiber, inorganic fiber and phenol resin in a weight mixing ratio of 2: 3: 5. The freeness based on the slurry was 300 cc.
- Binder phenolic resin (SP1006 made by Asahi Organic Materials Co., Ltd.)
- Coagulant Polyacrylamide coagulant (A110, manufactured by Mitsui Cytec)
- Dispersion medium water
- Weight ratio of organic fiber, inorganic fiber, and binder 2: 3: 5
- a mold having a cavity forming surface corresponding to FIG. 2 (a) was used as the papermaking mold.
- a net having predetermined openings is arranged on the cavity forming surface of the mold, and a large number of communication holes for communicating the cavity forming surface with the outside are formed.
- the mold comprises a pair of split molds.
- the raw material slurry is circulated by a pump, and while a predetermined amount of slurry is injected into the papermaking mold under pressure, water in the slurry is removed through the communication hole, and a predetermined fiber laminate is netted into the net. Deposited on the surface.
- pressurized air was injected into the papermaking mold to dehydrate the fiber laminate.
- the pressure of the pressurized air was 0.2 MPa, and the time required for dehydration was about 30 seconds.
- a curing agent (hexamethylenthramine) in an amount corresponding to 15% (weight ratio) of the binder was dispersed in water, and was uniformly applied to the entire surface of the obtained fiber laminate.
- a dry mold As a dry mold, it has a cavity forming surface corresponding to Fig. 2 (a) A mold was used.
- the mold has a large number of communication holes communicating the cavity forming surface with the outside.
- the mold is composed of a pair of split molds.
- the fiber laminate to which the curing agent was applied was taken out of the papermaking mold and transferred to a drying mold heated to 220 ° C. Then, a bag-shaped viscous core is introduced from the upper opening of the drying mold, and a pressurized fluid (pressurized air, 0.2 MPa) is supplied into the elastic core in the sealed drying mold. The core was swelled by injecting it into a core, and the fiber laminate was pressed against the inner surface of the drying mold with the core, and dried while transferring the inner shape of the drying mold to the surface of the fiber laminate.
- a pressurized fluid pressurized air, 0.2 MPa
- Thickness 0.8-1. O mm
- the fiber laminate was dehydrated and dried to obtain an intermediate molded body having a shape shown in FIG. 2 (a). Then, the intermediate molded body was impregnated with a binder as described below, dried and heat-cured to obtain a runner for a gate (a paper-made part for producing a product, weight of about 28 g) having the following physical properties.
- Organic fiber used newspaper paper, average fiber length 1 mm, CSF 150 cc
- Inorganic fiber carbon fiber (manufactured by Toray Industries, Inc., trade name “Tray power chop”, fiber length 3 mm)
- the slurry was adjusted to a 2: 1 weight ratio of organic fiber and inorganic fiber by a beater.
- the freeness based on the slurry was 300 cc '.
- Binder Obsidian (Kinsei Matek Co., Ltd., product name "Nice Snap")
- Paper Strengthening Material Polyvinyl alcohol fiber (5% by weight of organic fiber)
- Flocculant Polyacrylamide-based flocculant (Mitsui Cytec Co., Ltd., Al10)
- Dispersion medium water
- a paper laminate was obtained in the same manner as in Example 1 and dehydrated.
- the fiber laminate was removed from the papermaking mold and transferred to a drying mold heated to 220 ° C.
- a bag-shaped elastic core was inserted from the upper opening of the drying mold, and the operation was performed in the same manner as in Example 1 to obtain an intermediate molded body.
- the intermediate compact was dried in a drying oven at 150 ° C. for about 30 minutes, and the binder was thermally cured.
- the weight ratio of the organic fiber, the inorganic fiber, and the binder (obsidian + phenol resin) in the obtained intermediate molded body was 20:10:55 (40 + 15).
- the obtained intermediate molded body was cut as shown in FIG. 2 (b) and fitted as shown in FIG. 1 to obtain a runner for a gate.
- Thickness 0.7 to 1.1 mm
- the pouring system as shown in Fig. 3 was partially configured to form a solid mold, and the molten metal (140 ° C) was injected from the receiving port. did.
- the heat shrinkage accompanying thermal decomposition is suppressed, and the pouring system etc. which can respond
- mold cavities can be formed, and the papermaking parts for the manufacture of goods which are excellent in handleability and There is provided a method for producing a animal using the same.
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020037011378A KR100584637B1 (ko) | 2002-03-13 | 2003-03-10 | 주물제조용 초조 부품 |
AU2003221341A AU2003221341A1 (en) | 2002-03-13 | 2003-03-10 | Part prepared through sheet-making process for use in producing castings and method for preparation tyhereof |
US10/468,597 US7815774B2 (en) | 2002-03-13 | 2003-03-10 | Elements made by paper-making technique for the production of molded articles and production method thereof |
EP03710293A EP1488871B1 (en) | 2002-03-13 | 2003-03-10 | Part prepared through sheet-making process for use in producing castings and method for preparation thereof |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002-69277 | 2002-03-13 | ||
JP2002069277 | 2002-03-13 | ||
JP2002-305848 | 2002-10-21 | ||
JP2002305848 | 2002-10-21 | ||
JP2003-54518 | 2003-02-28 | ||
JP2003054518A JP4002200B2 (ja) | 2002-03-13 | 2003-02-28 | 鋳物製造用抄造部品 |
Publications (1)
Publication Number | Publication Date |
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WO2003076104A1 true WO2003076104A1 (fr) | 2003-09-18 |
Family
ID=27808416
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/002792 WO2003076104A1 (fr) | 2002-03-13 | 2003-03-10 | Partie preparee au moyen d'un procede de fabrication de feuille utilise pour produire des produits moules et son procede de preparation |
Country Status (8)
Country | Link |
---|---|
US (1) | US7815774B2 (ja) |
EP (2) | EP1488871B1 (ja) |
JP (1) | JP4002200B2 (ja) |
KR (2) | KR100607434B1 (ja) |
CN (1) | CN100363127C (ja) |
AU (1) | AU2003221341A1 (ja) |
DE (1) | DE20321856U1 (ja) |
WO (1) | WO2003076104A1 (ja) |
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US7815774B2 (en) * | 2002-03-13 | 2010-10-19 | Kao Corporation | Elements made by paper-making technique for the production of molded articles and production method thereof |
US8118974B2 (en) * | 2004-06-10 | 2012-02-21 | Kao Corporation | Structure for producing castings |
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JPH01278935A (ja) * | 1988-04-28 | 1989-11-09 | Kamogawa Kogyo Kk | 消失模型鋳造用湯口系構造 |
JPH0531128A (ja) * | 1991-05-31 | 1993-02-09 | G C:Kk | 歯科鋳造用リングライニング材 |
JPH06327704A (ja) * | 1993-05-18 | 1994-11-29 | Maeda Shinichi | 歯科鋳造用リングライニング材 |
JPH11254091A (ja) * | 1998-03-06 | 1999-09-21 | Japan Vilene Co Ltd | 溶融金属保持パイプ |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7815774B2 (en) * | 2002-03-13 | 2010-10-19 | Kao Corporation | Elements made by paper-making technique for the production of molded articles and production method thereof |
US7503999B2 (en) | 2002-11-13 | 2009-03-17 | Kao Corporation | Member for producing castings |
US8118974B2 (en) * | 2004-06-10 | 2012-02-21 | Kao Corporation | Structure for producing castings |
Also Published As
Publication number | Publication date |
---|---|
US20040069429A1 (en) | 2004-04-15 |
JP4002200B2 (ja) | 2007-10-31 |
AU2003221341A1 (en) | 2003-09-22 |
DE20321856U1 (de) | 2011-06-09 |
EP1488871B1 (en) | 2012-06-06 |
KR100584637B1 (ko) | 2006-05-30 |
CN1671492A (zh) | 2005-09-21 |
KR100607434B1 (ko) | 2006-08-02 |
EP1488871A4 (en) | 2006-06-07 |
CN100363127C (zh) | 2008-01-23 |
EP2263814A1 (en) | 2010-12-22 |
US7815774B2 (en) | 2010-10-19 |
KR20030088443A (ko) | 2003-11-19 |
KR20060015357A (ko) | 2006-02-16 |
EP1488871A1 (en) | 2004-12-22 |
JP2004195547A (ja) | 2004-07-15 |
EP2263814B1 (en) | 2017-01-25 |
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