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公开(公告)号：JP2000271701A
公开(公告)日：2000-10-03
申请号：JP8375499
申请日：1999-03-26
Applicant: KAO CORP
Inventor： NAKAI SHIGEO
IPC: B22C9/04
Abstract: PROBLEM TO BE SOLVED: To prevent casting defect caused by thermal decomposition of a pattern, in a simple process. SOLUTION: In a lost foam pattern casting method by embedding the pattern made of synthetic resin foaming body into molding sand and executing the casting, a gap is generated between the pattern and a mold and the pattern is not taken out, and the casting is executed. Desirably, the generation of the gap is executed by adding and mixing solvent having A±1.5 solubility parameter (wherein, A is the solubility parameter of the synthetic resin foaming body) into the molding sand.
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公开(公告)号：JPH0899147A
公开(公告)日：1996-04-16
申请号：JP25946494
申请日：1994-09-28
Applicant: KAO CORP
Inventor： KIUCHI KAZUHIKO , KATO MASAYUKI , SAWA MASUO , NAKAI SHIGEO
Abstract: PURPOSE: To obtain a hardener for producing casting molds which contains a wet process phosphoric acid soln. and hardly produces smells at the time of producing the casting molds. CONSTITUTION: This hardener for producing casting molds contains the reformed wet process phosphoric acid soln. The reformed wet process phosphoric acid soln. is obtd. by executing steam stripping to the raw material wet process phosphoric acid liquid obid. by effecting a phosphorous are and sulfuric acid under the following conditions: The conditions are to adjust the concn. of the sulfuric acid in the wet process phosphoric acid soln. to 0.5 to 7wt.% and to heat the wet process phosphoric acid soln to 120 to 170 deg.C. The adjustment of the concn. of the sulfuric acid may be executed by incorporating a sulfuric acid to a raw material wet process phosphate or using the excess sulfuric acid at the time of producing the raw material wet process phosphoric acid soln. The reformed wet process phosphoric acid soln. obtd. by executing steam stripping under the conditions satisfying these two conditions has a chlorine atom concn. of about
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公开(公告)号：JPH0857574A
公开(公告)日：1996-03-05
申请号：JP21810094
申请日：1994-08-19
Applicant: KAO CORP
Inventor： KATO MASAYUKI , KIUCHI KAZUHIKO , NAKAI SHIGEO , SAWA MASUO
Abstract: PURPOSE: To provide a casting mold which hardly generates gas deffects on resulted castings and does not generate harmful gases at the time of pouring. CONSTITUTION: This casting mold is composed of a casting mold body and a coating agent applied on the surfaces of the casting mold body. This casting mold body is formed by using a sand compsn. contg. a refractory granular material contg. reconditioned sand as a chief material, a binder contg. an acid curing type resin and an acidic catalyst, such as phosphoric acid compd. and sulfonic acid compd. The refractory granular material preferably contains >=90wt.% reconditioned sand. The weight ratio of the phosphorus atom content and sulfur atom content in the reconditioned sand satisfies the equation 0.005
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公开(公告)号：JPH0639484A
公开(公告)日：1994-02-15
申请号：JP22068092
申请日：1992-07-27
Applicant: KAO CORP
Inventor： KIUCHI KAZUHIKO , NAKAI SHIGEO , TANAKA TSUTOMU , KATO MASAYUKI
Abstract: PURPOSE:To provide the composition of sand for forming a mold capable of manufacturing a casting scarce in gas defect. CONSTITUTION:This sand composition for forming the mold is composed of reconditioned sand, binder consisting of acid hardening furan resin and phosphorus compound as hardening catalyst for the acid hardening furan resin. As the reconditioned sand, the one satisfying the following two essential condition. That is, (1) the difference between an ignition loss ratio of the reconditioned sand and the ignition loss ratio of the new sand is to be
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公开(公告)号：JPH04371346A
公开(公告)日：1992-12-24
申请号：JP14450491
申请日：1991-06-17
Applicant: KAO CORP
Inventor： SAKAI MITSURU , KIUCHI KAZUHIKO , NAKAI SHIGEO
IPC: B22C1/22
Abstract: PURPOSE:To improve a collapsing property of the sand core and to eliminate the need for the execution of a heat treatment in a knock-out stage as well as to decrease the number of stages by using the above binder compsn. at the time of producing the sand core to be applied to an undercut part in die casting for casting a light alloy under a high pressure. CONSTITUTION:This binder compsn. for the sand core for high-pressure casting is the binder compsn. used at the time of producing the sand core to be applied to the undercut part in die casting for casting the light alloy under several 10 to several 100kg/cm pressure by blowing gaseous or aerosol sulfur dioxide into a sand mold formed by adding and mixing the binder compsn. and peroxide compsn. to and with refractory aggregate and molding the mixture. The above- mentioned binder compsn. consists of at least one kind selected from specific groups or at least one kind of the copolymers thereof and at least one kind among a furan resin, phenol resin, urea resin, and melamine resin.
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Patent Agency Ranking
公开(公告)号：JPH04123837A
公开(公告)日：1992-04-23
申请号：JP24072690
申请日：1990-09-11
Applicant: KAO CORP
Inventor： MURAYAMA HAJIME , MAEDA MINORU , NAKAI SHIGEO
IPC: B22C1/22
Abstract: PURPOSE:To drastically improve the smoothness of casting surface by specifying the composition of acid-setting resin used for binder for molding sand. CONSTITUTION:The binder composition for molding sand is composed of the acid-setting resin and strong acidic salt and weak basic salt and used at the time of forming a mold by kneading this with refractoriness granular aggregate and heat-setting this, and having the following characteristic composition in the above acid-setting resin, (a) 20-35wt.% resol type phenol resin, (b) 40-65wt.% furfuryl alcohol or furan resin, (c) 15-50wt.% resin or the mixed material of at least one or more kinds selected from group composed of bisphenol A reaction residue, rosin, rosin ester, coumarone-indeneresin, lignin, dicyclopentadiene- allyl alcohol copolymer and cresol reaction residue.
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公开(公告)号：JPH04118150A
公开(公告)日：1992-04-20
申请号：JP23641490
申请日：1990-09-05
Applicant: KAO CORP
Inventor： KIUCHI KAZUHIKO , FUNADA HITOSHI , KURA AKIRA , NAKAI SHIGEO
IPC: B22C1/22
Abstract: PURPOSE:To drastically improve mold strength by using a binder composition for molding sand containing one or more kinds of the specific alcohol kind in water-soluble phenol resin. CONSTITUTION:The binder composition for organic ester curing type molding sand contains water-soluble phenol resin and one or more kinds of alcohol as the essential components, and as the alcohol kind, univalent alcohol having 3-12 carbons or the alcohol having at least one of aromatic ring in the molecule is used. Concretely, the following material is used, i.e., propyl alcohol, isopropyl alcohol, butyl alcohol, isobutyl alcohol, etc.
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公开(公告)号：JPH04118146A
公开(公告)日：1992-04-20
申请号：JP23641090
申请日：1990-09-05
Applicant: KAO CORP
Inventor： KIUCHI KAZUHIKO , FUNADA HITOSHI , KURA AKIRA , NAKAI SHIGEO
IPC: B22C1/22
Abstract: PURPOSE:To drastically improve mold strength by using a binder composition for molding sand having the compsn. containing one or more kinds of the specific phosphoric ester in water-soluble phenol resin. CONSTITUTION:By using the binder composition for organic ester curing type molding sand having the compsn. containing water-soluble phenol resin and one or more kinds of the phosphoric triester kind as the essential component, the mold is molded. Further, as the phosphoric triester kind, phosphoric trimethylester, phosphoric triethylester, phosphoric tributyl ester, etc., is used.
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公开(公告)号：JP2009195991A
公开(公告)日：2009-09-03
申请号：JP2009137884
申请日：2009-06-09
Inventor： TSUURA TOKUO , KOBAYASHI HIROAKI , TAKAGI SHIGEMASA , NAKAI SHIGEO , SONO TOKIHITO
Abstract: PROBLEM TO BE SOLVED: To provide a member for producing castings which is less liable to thermal shrinkage due to thermal decomposition, and easy to handle.
SOLUTION: Disclosed is a member for producing castings which is prepared by forming a base paper for a paper-jointing tube into a tubular shape and includes an organic fiber, an inorganic fiber, and a binder. The base paper for a paper-jointing tube is preferably formed into a tubular shape through winding. The contents of the organic fiber, the inorganic fiber and the binder are preferably 10 to 70 parts by weight, 1 to 80 parts by weight and 10 to 85 parts by weight, respectively. The organic fiber is preferably a pulp fiber.
COPYRIGHT: (C)2009,JPO&INPITAbstract translation: 要解决的问题：提供一种用于生产由于热分解而不易受热收缩而易于处理的铸件的构件。 解决方案：公开了一种用于生产铸件的构件，其通过将用于纸接合管的原纸形成为管状并且包括有机纤维，无机纤维和粘合剂而制备。 用于纸接合管的原纸优选通过卷绕形成管状。 有机纤维，无机纤维和粘合剂的含量优选为10〜70重量份，1〜80重量份和10〜85重量份。 有机纤维优选为纸浆纤维。 版权所有（C）2009，JPO＆INPIT
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公开(公告)号：JP2006255737A
公开(公告)日：2006-09-28
申请号：JP2005074561
申请日：2005-03-16
Inventor： NAKAI SHIGEO
Abstract: PROBLEM TO BE SOLVED: To provide a method for producing a thin casting excellent in the surface flatness. SOLUTION: A mold obtained from spherical molding sand made by a flame-fusion method, is heated at the surface temperature of 60-250°C and molten metal is poured to produce the casting having thin portion of ≤6 mm. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract translation: 要解决的问题：提供一种制造表面平坦度优异的薄铸件的方法。 解决方案：将通过火焰熔融法制成的球形型砂获得的模具在60-250℃的表面温度下加热，并将熔融金属浇注以制备具有≤6mm的薄部分的铸件。 版权所有（C）2006，JPO＆NCIPI
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