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1. 发明专利

JP2001150102A METHOD OF MANUFACTURING SPHEROIDAL GRAPHITE CAST IRON PARTS WITH IN-MOLD PROCESS 失效
公开(公告)号：JP2001150102A
公开(公告)日：2001-06-05
申请号：JP37622999
申请日：1999-12-01
申请人： KURIMOTO LTD
发明人： UMEMOTO KOSAKU , MICHIURA YOSHISADA , KITAGAWA MASAYOSHI , OIDE TAKU
IPC分类号： B22D1/00 , C21C1/10
摘要： PROBLEM TO BE SOLVED: To provide a method of manufacturing spheroidal graphite cast iron parts with an in-mold process, with which molten metal treating agents can perfectly be reacted with molten metal regardless of kind and grain diameter of the molten metal treating agents. SOLUTION: Granular graphite sheroidize-treating agent 6 is installed to the lowermost layer in a reaction chamber 4 and powdery alloying treating agents 7 are installed by dividing into plural layers at the upper layer side thereof. These respective layers are partitioned with foamed polystyrene sheets 8a, 8b and then, after allowing the alloying treating agent 7 to precedingly bring into contact with the molten metal, the graphite spheroidize-treating agent 6 is reacted with the molten metal run into the lower layer side. The molten metal in the reaction chamber 4 is stirred from the lower layer side so as to react with the molten metal without remaining as the solid state of the graphite spheroidize-treating agent 6 and the alloying treating agent 7 in the reaction chamber 4.

2. 发明专利

JP2001269767A METHOD FOR PRODUCING SPHEROICAL GRAPHITE CAST IRON PRODUCT 失效
公开(公告)号：JP2001269767A
公开(公告)日：2001-10-02
申请号：JP2000132964
申请日：2000-03-27
申请人： KURIMOTO LTD
发明人： UMEMOTO KOSAKU , MICHIURA YOSHISADA , KITAGAWA MASAYOSHI , OIDE TAKU
IPC分类号： B22D1/00 , B22C3/00 , B22D27/18 , C22C33/10
摘要： PROBLEM TO BE SOLVED: To provide a producing method of a spheroidal graphite cast iron product in which a flake graphite cast iron structure can be formed in at least a part of the surface of the spheroidal graphite cast iron product when the casting is performed. SOLUTION: Powdery iron sulfide is blended into either molding sand of a master mold 2 or a core 3 in the mod, and the iron sulfide is reacted with magnesium in the molten cast iron on the boundary of the mold at the portion blended with this iron sulfide and the magnesium having the graphite spheroidizing action, is consumed and the flake graphite is crystallized in this portion so as to form the flake graphite cast iron structure excellent in the wear resistance and the vibration damping property on the surface layer of the spheroidal graphite cast iron product.

3. 发明专利

JP2001121245A PRODUCING METHOD OF CAST IRON PARTS 失效
公开(公告)号：JP2001121245A
公开(公告)日：2001-05-08
申请号：JP30413399
申请日：1999-10-26
申请人： KURIMOTO LTD
发明人： UMEMOTO KOSAKU , MICHIURA YOSHISADA , KITAGAWA MASAYOSHI , OIDE TAKU
IPC分类号： E02D29/14 , B22D1/00
摘要： PROBLEM TO BE SOLVED: To provide a producing method of cast iron parts, by which the cast iron parts having an inclining function can easily be produced without using the additional equipment and process. SOLUTION: On the way of two runners 2 divided from a sprue 1, respective reaction chambers 3a and 3b are arranged, and in the one side of the reaction chamber 3a, magnesium as a graphite spherodizing treatment agent is charged and in the other side of the reaction chamber 3b, nickel-magnesium as an alloying treatment agent together with the graphite spheroidizing treatment agent and nickel as the alloying treatment agent, are charged. Molten metal from the reaction chamber 3b having high nickel concentration and large specific gravity is introduced into the lower layer side of a product cavity 5 by pouring the molten metals having different specific gravities treated in the respective reaction chambers 3a and 3b into the product cavity 5 to produce a spheroidal graphite cast iron-made manhole cover having very excellent corrosion resistance at the lower surface side.

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