专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JPS63286240A CUTTING METHOD FOR POLYOLEFIN RESIN FOAMING BODY 失效
公开(公告)号：JPS63286240A
公开(公告)日：1988-11-22
申请号：JP11908487
申请日：1987-05-18
申请人： MITSUBISHI HEAVY IND LTD , JAPAN STYRENE PAPER CORP
发明人： KADOI JUN , YOKOTE HIROMI , NAGANUMA SHIZUKA , KAI TOSHIO , KUWABARA HIDEKI , HASHIBA MASAHIRO , NAITO MASATO
IPC分类号： B22C7/02
摘要： PURPOSE:To obtain the resin foaming body having smooth cutting face and good surface roughness by cutting the polyolefin resin foaming body of a polyethylene resin, polypropylene resin, etc., at the rotary speed more than the specified value on the relative speed of the foaming body and a cutter. CONSTITUTION:A polyolefin resin foaming body is cut at the rotary speed more than the relative speed of 300m/min of this foaming body and a cutter. When the polyolefin resin foaming body is cut by the cutter rotating at high speed, the deformation of the foaming particle itself is checked and ruptured (cut), hence no tear due to the peeling of the grain boundary is generated. The model of a polyolefin resin foaming body having smooth cutting face and good surface roughness can therefore be formed and the surface roughness of a casting is improved.

2. 发明专利

JPS62179849A CASTING METHOD 失效
公开(公告)号：JPS62179849A
公开(公告)日：1987-08-07
申请号：JP2023686
申请日：1986-02-03
申请人： MITSUBISHI HEAVY IND LTD , JAPAN STYRENE PAPER CORP
发明人： WATANABE TEISHIRO , KAI TOSHIO , KUWABARA HIDEKI , NAITO MASATO
IPC分类号： B22C9/04
摘要： PURPOSE:To prevent casting defects and blow by embedding a pattern for a casting consisting of a polyolefinic resin foam into non-binding sand or binding sand in such a manner that the pattern is in successive contact with the atm. air, then pouring a molten metal into a casting mold. CONSTITUTION:The pattern 1 for the casting consisting of the polyolefinic resin foam is united with a runner 3 and gate 4 made of the same material by an adhesive agent or the like to one body. The non-binding sand 5 is laid in the bottom in a molding flask 8 and the united body is installed therein. A sprue 2 made of a clay pipe and a vent port 7 for decreasing the blow are installed in the runner 3 position and a gas vent port 6 is installed in the upper part of the pattern 1. While the non-binding sand 5 is thrown into the casting mold by an oscillation molding machine, the molding is completed and the molten metal is poured into the casting mold. The quality is improved by the above-mentioned method.

3. 发明专利

JPS61266146A MASTER PATTERN MATERIAL FOR CASTING 失效
公开(公告)号：JPS61266146A
公开(公告)日：1986-11-25
申请号：JP10978585
申请日：1985-05-22
申请人： JAPAN STYRENE PAPER CORP , MITSUBISHI HEAVY IND LTD
发明人： KUWABARA HIDEKI , NAITO MASATO , HAMADA TADATSUGU , WATANABE TEISHIRO
IPC分类号： B22C7/00
摘要： PURPOSE:To form a master pattern for casting so as to have adequate workability and compressive strength and to provide a smooth surface having low water absorptivity thereto by putting the prefoamed particles of a crosslinked PP resin having a specific gel fraction into a mold and heating the same to expand to the specific density and average cell size. CONSTITUTION:Adequate amts. of water, antisticking agent talc, org. peroxide crosslinking agent such as 1,1-bis(t-butyl peroxy)3,3,5-trimethyl cyclohexane and crosslinking assistant divinyl benzene are added to the PP resin such as ethylene/propylene random copolymer having density and 70-1,000mum average cell size is obtd. The good master pattern for casting having the adequate cutting workability, compressive strength, smooth surface and low water absorptivity is thus obtd.

4. 发明专利

JPS61212442A CASTING METHOD 失效
公开(公告)号：JPS61212442A
公开(公告)日：1986-09-20
申请号：JP5331085
申请日：1985-03-19
申请人： MITSUBISHI HEAVY IND LTD , JAPAN STYRENE PAPER CORP
发明人： WATANABE TEISHIRO , HAMADA TADATSUGU , KUWABARA HIDEKI , NAITO MASATO
IPC分类号： B22C7/02 , B22C9/04
摘要： PURPOSE:To make possible the use of a polyolefin resin foam for a pattern in consumable pattern casting in which the pattern made of the polyolefin resin foam for a casing is used by attaching gas vent ports communicating with the atm. to a runner and/or the bottom surface of the pattern. CONSTITUTION:The pattern 1 is formed of the foamed-in-place molding of an ethylene-propylene random copolymer by a bead method and is adhered to a runner 3 and gate 4 made of the same material by a vinyl acetate resin adhesive agent. The assembly is installed together with a sprue 2 into a molding flask 7 and is attached with the patterns for the gas vent port 5 on the side face of the runner 3, the gas vent port 5' at both top ends of the runner 3 and the gas vent port 5'' having a prescribed angle of inclination from the bottom surface of the pattern 1 on the counter sprue side. Furan sand is packed to the periphery thereof and is solidified. The patterns for the ports 5, 5', 5'' are thereafter removed and the casting mold is formed.

5. 发明专利

JPS61212441A CASTING METHOD 失效
公开(公告)号：JPS61212441A
公开(公告)日：1986-09-20
申请号：JP5331185
申请日：1985-03-19
申请人： MITSUBISHI HEAVY IND LTD , JAPAN STYRENE PAPER CORP
发明人： WATANABE TEISHIRO , HAMADA TADATSUGU , KUWABARA HIDEKI , NAITO MASATO
IPC分类号： B22C7/02 , B22C9/04
摘要： PURPOSE:To prevent the blow of a molten metal by embedding a pattern for a casting consisting of polyolefin resin foam into molding sand and providing a vent port to the upper part of a casting mold. CONSTITUTION:The pattern 5 for a casting consisting of the polyolefin resin foam, as well as a runner 3 and a gate 4 made of the same material are adhered by an adhesive agent, etc. and thereafter the assembly is installed together with a pattern for the vent port placed atop the pattern and a sprue 2 made of a clay pipe in a molding flask. After the molding sand 1 is packed to the periphery and is solidified, the pattern of the vent port is removed from the molding sand 1 to form the vent port 6. The gas is thereby released into the atm. and the blow of the molten metal is prevented.

6. 发明专利

JPS62207530A CASTING METHOD 失效
公开(公告)号：JPS62207530A
公开(公告)日：1987-09-11
申请号：JP4739086
申请日：1986-03-06
申请人： MITSUBISHI HEAVY IND LTD , JAPAN STYRENE PAPER CORP
发明人： WATANABE TEISHIRO , KAI TOSHIO , KUWABARA HIDEKI , NAITO MASATO
IPC分类号： B22C9/00 , B22C9/04
摘要： PURPOSE:To prevent the deterioration of the quality of a casting product by the generated gas by providing a vent port via a fine hole to the upper part of a pattern for casting and providing a vent port communicating with the atm. to a runner as well in an expendable pattern casting method. CONSTITUTION:The pattern 1 for casting, the runner 3 and a gate 4 are formed of a polyolefin resin foam. A sprue 2 made of a clay pipe is connected to the runner 3. The gas vent port 6 is installed to the upper part of the pattern 1 and the fine hole 10 is provided right under the vent port 6. The vent port 7 is provided to the runner 3 as well. The casting mold constituted in the above- mentioned manner is installed in a molding flask 8 and the circumference thereof is enclosed with non-binding sand (or binding sand) 5. Casting is started by connecting a vacuum hose 9 to the vent port 6, then pouring a molten metal from the sprue 2 and at the same time executing evacuation to a vacuum. The evaporated gas of the expendable pattern is quickly discharge through the fine hole 10 and the vent port 7 discharges the evaporated gas right after the casting to prevent the spouting of the molten metal from the sprue 2.

7. 发明专利

JPS6284853A MATERIAL FOR CASTING PATTERN 失效
公开(公告)号：JPS6284853A
公开(公告)日：1987-04-18
申请号：JP22655385
申请日：1985-10-09
申请人： JAPAN STYRENE PAPER CORP , MITSUBISHI HEAVY IND LTD
发明人： KUWABARA HIDEKI , NAITO MASATO , HAMADA TADATSUGU , WATANABE TEISHIRO
IPC分类号： B22C7/00 , C08J9/06
摘要： PURPOSE:To obtain a material having excellent cutting workability and parting characteristic for a casting pattern by foam molding a crosslinked PE resin particles which is formed of a HDPE resin and having a limited gel fraction in a mold integrally. CONSTITUTION:The material for the casting pattern consists of the foamed material formed by foam molding the crosslinked PE resin particles having and the average cell size to a 70-1,000mum range. The workability is deteriorated if the density exceeds the above-mentioned range and the dimensional stability is deteriorated if the range is below the range. The crosslinked PE resin particles used as the material for the casting pattern is formed of the HDPE resin.

8. 发明专利

JPS61199544A MATERIAL FOR MASTER MOLD FOR CASTING 失效
公开(公告)号：JPS61199544A
公开(公告)日：1986-09-04
申请号：JP3851285
申请日：1985-02-27
申请人： JAPAN STYRENE PAPER CORP , MITSUBISHI HEAVY IND LTD
发明人： KUWABARA HIDEKI , NAITO MASATO , YOSHIMURA SHOHEI , KAWASAKI SHUICHI , WATANABE TEISHIRO , HAMADA TADATSUGU
IPC分类号： B22C7/02 , C08J9/22
摘要： PURPOSE:To improve a parting characteristic by forming a master mold material of a foamed-in-place molding of an uncrosslinked PP resin formed of a non-thermal decomposition type foaming agent having specific density and average cell size. CONSTITUTION:Resin particles, water, antisticking agent such as Al oxide and foaming agent are compounded in an autoclave and after the inside of the autoclave is pressurized and heated up, the contents are released therefrom into a low pressure zone, by which the prefoamed particles are obtd. The prefoamed particles are then pressurized in a pressure-resistant vessel to provide the in-particle pressure of about 0.5-3kg/cm into the particles. Such particles are put into a metallic mold. The particles are further foamed by heating to make the foamed molding. The molding is taken out of the mold after cooling. The foamed molding is formed to have 0.02-0.2g/cm density and 70-1,000mum average cell size and is formed of the foamed-in-place molding of the uncrosslinked PP resin. The remarkable improvement in the parting characteristic is attained from the decreased water absorptivity and the improved compressive hardness.

9. 发明专利

JPS63171241A FULL-MOLD CASTING METHOD 失效
公开(公告)号：JPS63171241A
公开(公告)日：1988-07-15
申请号：JP138887
申请日：1987-01-07
申请人： JAPAN STYRENE PAPER CORP , MITSUBISHI HEAVY IND LTD
发明人： KUWABARA HIDEKI , NAITO MASATO , KADOI SHIYUN , KAI TOSHIO
IPC分类号： B22C9/04
摘要： PURPOSE:To obtain a high-quality casting product having no defects at a low cost by erasing a pattern for casting consisting of a resin foam embedded in molding sand having high gas dissipatability and pouring molten metal into a casting mold and pressing the molding sand downward. CONSTITUTION:The pattern for casting consisting of the resin foam is embedded into the molding sand. The molten metal is brought into contact with such pattern to expend the pattern by the heat of the molten metal. Casting is executed by packing the molten metal into the trace after the expending of the pattern. The molding sand having the high gas dissipatability is used as the molding sand and the expending of the pattern by the molten metal and the packing of the molten metal into the trace of the pattern are executed while the external force to press the molding sand downward is kept exerted to the molding sand positioned in the upper part of the pattern in the above-mentioned full-mold casting method. The gas generated by the expending of the pattern is thereby dissipated quickly through the molding sand and the pushing up of the molding sand by the packing pressure of the molten metal is prevented. The casting product having the good dimensional accuracy without having the surface defect, etc., is thus obtd.

10. 发明专利

JPS61199545A CONSUMABLE PATTERN MATERIAL FOR CASTING 失效
公开(公告)号：JPS61199545A
公开(公告)日：1986-09-04
申请号：JP3987385
申请日：1985-02-28
申请人： JAPAN STYRENE PAPER CORP , MITSUBISHI HEAVY IND LTD
发明人： KUWABARA HIDEKI , NAITO MASATO , WATANABE TEISHIRO , HAMADA TADATSUGU
IPC分类号： B22C7/02 , B22C9/04
摘要： PURPOSE:To reduce the cost of a product by forming a pattern material of a crosslinked foamed-in-place molding of which the resin consists of a PP resin and high density polyethylene and which has specific density. CONSTITUTION:The pattern material is formed of the crosslinked foamed-in- place molding of which the resin consists of the PP resin and/or high density polyethylene and which has 0.025-0.012g/cm density. The PP resin to be used for such full mold pattern material is exemplified by an ethylene/propylene random copolymer, ethylene/propylene block copolymer, propylene homopolymer, etc. Since the resin and the density are specified in the above-mentioned manner, the resin is easily gasified when the resin contacts with the molten metal poured into the mold. No soot is generated in such a stage. The resultant casting has no surface defects such as 'gas pockets' and 'wave-like surface folding' owing to the unevaporated residue and is free from the carburization in the casting. The casting has excellent dimensional accuracy as well.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式