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1. 发明专利

JPS63149063A CASTING APPARATUS 失效
公开(公告)号：JPS63149063A
公开(公告)日：1988-06-21
申请号：JP29347586
申请日：1986-12-11
申请人： NGK INSULATORS LTD
发明人： ITO MORIAKI , TAKAHARA HIDEKI
IPC分类号： B22D18/04
摘要： PURPOSE:To cast castings having different size under good energy efficiency by setting an inner cylinder having penetrating hole at upper part on a bottom plate of high pressure vessel to set a mold and casting under high pressure after closing the high pressure vessel while pouring molten metal in the inner cylinder. CONSTITUTION:The lower half part 1b of high pressure vessel 1 is laid on the bottom part 1c through a packing on the bottom plate 1c, the mold 3 having the prescribed shape and the inner cylinder 4 having the same cylindrical shape as the shape of mold 3 are set. Next, after pouring the molten metal 8 in the inner cylinder 4, the upper half part 1a of high pressure vessel 1 is laid on the lower half part 1b through a packing 6a, flange part 4a and packing 6b, to tightly close by clamping the die. Next, high pressure nitrogen gas is supplied through the high pressure gas supplying hole 2 and the inner part of high pressure vessel 1 is made to high pressure condition, to execute the pressurizing solidification. Then, the inner and outer pressure of inner cylinder 4 are become to the same by the through hole 7 of inner cylinder 4. In this way, even in case the shape of mold 3 is changed, as the inner cylinder 4 can prepare corresponding to the mold 3, the using quantity of molten metal may be reduced, and the energy efficiency is good.

2. 发明专利

JPS63306010A TIRE MOLD AND ITS PREPARATION 失效
公开(公告)号：JPS63306010A
公开(公告)日：1988-12-14
申请号：JP14193487
申请日：1987-06-05
申请人： NGK INSULATORS LTD
发明人： ITO MORIAKI
IPC分类号： B22D9/00 , B22C9/06 , B22C9/22 , B29C33/38 , B29C33/42 , B29C35/02 , B29K21/00 , B29K105/24 , B29L30/00
摘要： PURPOSE:To easily and accurately prepare two types of tire molds according to a master model without requiring the cutting of burr or the discarding treatment thereof, by forming a tread pattern having no vent hole to an inner peripheral surface and forming an annular cast from a thin refractory plate. CONSTITUTION:Casting surfaces 4 due to thin refractory plates 3 extending in a radius direction are mounted on both sides. A large number split tread molding parts 5 having tread patterns 2 having no vent hole formed to the inner peripheral surfaces thereof are arranged in a mold main body in such a state that slits each having the interval almost equal to the thickness of each thin refractory plate are formed between the mutual casting surfaces. Thin refractory plates 3 having a thickness of 0.01-0.5 mm are held between a large number of split model 1 having tread patterns formed to the outer peripheral surfaces thereof so as to protrude in the direction to constitute an annular cast. A metal is cast in the outer periphery thereof and the parts corresponding to the thin refractory plates are cut from the outside to remove the thin refractory plates and respective cast pieces are separated. The split tread molding parts 5 thus obtained are mounted in the mold main body at the intervals almost equal to those of the thin refractory plates.

3. 发明专利

JPS63160741A MOLD FOR PRECISION CASTING 失效
公开(公告)号：JPS63160741A
公开(公告)日：1988-07-04
申请号：JP30546886
申请日：1986-12-23
申请人： NGK INSULATORS LTD
发明人： ITO MORIAKI , MATSUURA TAKAO , TAKEMURA SHINICHI
IPC分类号： B22C1/00
摘要： PURPOSE:To obtain a mold for precision casting having good transference of product from the mold and dimensional accuracy by prescribing purity and grain blending of mullite used as the molding material. CONSTITUTION:As the mold for precision casting, the molding material is used by mullite having >=98% mullite and grain blending of by wt.% of 3-18% 10-20 mesh, 7-30% 20-100% mesh, 1-30% 200-325 mesh 30-75% 325 mesh under. In the molding material, if necessary, 1-30% alumina or 10-60% zirconia having 325 mesh under is contained. In this way, the mold for precision casting having good transference of product from the mold and dimensional accuracy is obtd.

4. 发明专利

JPS63143247A CASTING METHOD 失效
公开(公告)号：JPS63143247A
公开(公告)日：1988-06-15
申请号：JP28976186
申请日：1986-12-06
申请人： NGK INSULATORS LTD
发明人： ITO MORIAKI , TAKAHARA HIDEKI , MIZUNO SHINJI
IPC分类号： C22F1/08 , C22C9/00 , C22F1/00
摘要： PURPOSE:To obtain a casting having nearly uniform satisfactory hardness and satisfactory dimensional accuracy by casting a molten age hardening alloy, holding the cast alloy at a specified temp. for a specified time during cooling, quenching the cast alloy and age-hardening it. CONSTITUTION:A molten age hardening alloy is poured into a casting mold and cast. The cast alloy is soaked by holding at 650-850 deg.C for 0.5-10hr during cooling and it is released from the mold, quenched and age-hardened. By this method, the structure is homogenized and a casting having nearly uniform hardness and high dimensional accuracy is obtd. A Be-Cu alloy consisting of 1.5-3.0wt% Be, 0.2-1.0wt% Co,

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