| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 21 | JPS6253255B2 - | JP9956184 | 1984-05-17 | JPS6253255B2 | 1987-11-10 | HARAGA TETSUO; KATO KOJI; MIZUNO KUNIAKI |
| 22 | Production of resin coated sand for shell mold | JP1038085 | 1985-01-23 | JPS61169127A | 1986-07-30 | YOSHIDA YASUSHI; SHIROTA FUMIO; OKADA TAKAHIRO; IDE ISAMU |
| PURPOSE:To prevent the cracking of a shell mold and to improve the surface of a casting by coating a coating layer consisting of a carbon powder-contg. phenolic resin on the surface of molding sand. CONSTITUTION:A phenolic resin binder and carbon powder are respectively added to the molding sand and are mixed. The coating layer consisting of the carbon powder contg. phenolic resin is coated on the surface of the molding sand by using such mixture. A novolak type phenolic resin, resol type phenolic resin or the mixture composed thereof is used for the phenolic resin as the binder. One or >=2 kinds among petroleum coke, petroleum pitch coke, natural graphite, anthracite, arti-ficial graphite, carbon black, resinous coal, precursors, etc. are used in combination for the carbon powder. | ||||||
| 23 | JPS61501378A - | JP50164785 | 1985-04-03 | JPS61501378A | 1986-07-10 | |
| 24 | JPS5319535B2 - | JP14855975 | 1975-12-15 | JPS5319535B2 | 1978-06-21 | |
| 25 | JPS4926120A - | JP7518872 | 1972-07-28 | JPS4926120A | 1974-03-08 | |
| 26 | MOLDING SAND RECLAMATION METHOD AND RECLAMATION EQUIPMENT | US15577508 | 2016-04-18 | US20180133719A1 | 2018-05-17 | Takahumi OBA; Junichi IWASAKI; Kazuya ABE; Tatsuyuki AOKI |
| A method includes measuring a water content and a magnetized matter content of molding sand discharged from green sand casting equipment; comparing the measured water content with a first control value, and if the water content exceeds the first control value, drying the molding sand until the water content becomes equal to or less than the first control value; comparing the measured magnetized matter content with a second control value, and if the magnetized matter content exceeds the second control value, magnetically separating the molding sand until the magnetized matter content becomes equal to or less than the second control value; thereafter, reclaiming the molding sand by dry mechanical reclamation until a loss-on-ignition becomes equal to or less than a third control value; and classifying the molding sand until a total clay content becomes equal to or less than a fourth control value. | ||||||
| 27 | Waste foundry sand to frac sand process | US14065651 | 2013-10-29 | US09192984B2 | 2015-11-24 | Francis A. Lesters |
| Foundries utilize quartz foundry sand and generate waste foundry sand as a by-product. Frac sand exists with other components within the waste foundry sand. A configuration of machinery processing a flow of quartz waste foundry sand into frac sand includes a screening device separating the flow and providing the frac sand. | ||||||
| 28 | MIXING AND ADJUSTING METHOD FOR FOUNDRY SAND | US14391036 | 2013-06-04 | US20150114259A1 | 2015-04-30 | Yuichi Ogura; Koji Takishita; Hisashi Harada |
| Provided is a mixing and adjusting method for foundry sand that uses a sand muller, having weight measuring means for measuring a weight of the foundry sand to be mixed, water content measuring means for measuring a water content of the foundry sand to be mixed, water pouring means for pouring water into the foundry sand, and CB value measuring means for measuring a CB value of the foundry sand during mixing. | ||||||
| 29 | Process for producing reclaimed casting sand | US12676804 | 2008-09-11 | US08551373B2 | 2013-10-08 | Yoshimitsu Ina |
| The present invention relates to a process for producing reclaimed casting sand, which has step (I) of grinding recovered sand in the presence of an additive (A) containing a liquid having a surface tension of not higher than 35 mN/m at 25° C. and a boiling point of not lower than 150° C. at 1 atmospheric pressure. | ||||||
| 30 | Products for the manufacture of molds and cores used in metal casting and a method for their manufacture and recycle from crushed rock | US09922862 | 2001-08-07 | US06691765B2 | 2004-02-17 | Robert E. Sparks; Kenneth Hillel Peter Harris |
| A system and method for producing foundry quality sand from non-conventional starting materials through the combination of oolitization and classification. Incoming particulate matter is first directed into a controlled energy attrition unit where the particles are made to collide with one another. Such collisions clean and round the particles by chipping away surface projections and coatings without crushing the particles. The particle stream is then directed through a multi-fraction classifier where it is separated into two or more useable grades of foundry sand. An air classifier is preferred for the classification stage. | ||||||
| 31 | Method for making sand covered with bentonite, the sand, and a method for recycling molding sand for a mold using the sand covered by bentonite | US10043172 | 2002-01-14 | US06591891B2 | 2003-07-15 | Ryoji Kanayama; Yasunori Yoshida; Kuniyasu Mori; Kazuo Sugimoto; Yukikazu Ando |
| Given green sand is obtained by a mixing operation that is carried out for a short period of time. Discarded sand is supplied as supplementary sand to a sand processing line, so that molding sand can be recycled. Green sand for a molding is used for facing sand or the pocket sand. Bentonite-covered sand is made by mixing reproduced sand, new sand, and discarded sand or any or all of them. The bentonite-covered sand is added to collected sand to supplement it. Also, the bentonite-covered sand is mixed with water, and used for facing sand or the pocket sand. | ||||||
| 32 | Collected sand processing method | US10220340 | 2002-08-30 | US20030037899A1 | 2003-02-27 | Shigeaki Yamamoto; Kuniyasu Mori; Ryoji Kanayama; Hisashi Harada; Hiroaki Tokita; Kazuo Sugimoto; Takehiro Matsumoto; Hiroyasu Makino; Yasunori Yoshida |
| A method and apparatus are provided to process collected sand. This method and apparatus allow the moisture content to be adjusted and the addition of a binder to be facilitated to renew the collected sand as casting sand for future use. Also, defective castings are prevented when they are made by a main mold using the renewed casting sand. The sand-collecting means can be compact. The method is performed and the apparatus is operated by separating a main mold of green sand, after casting is conducted, into parts unaffected and affected by the molten metal heat, adjusting the moisture content of the part unaffected by molten metal heat for use as facing sand in the next main mold making, and adding a binder and adjusting the moisture content of the part affected by the molten metal heat for use as back sand in making the next main mold. | ||||||
| 33 | Process for the mechanical cleaning of foundry used sand | US866558 | 1992-04-10 | US5291935A | 1994-03-08 | Volker Godderidge |
| The invention relates to a process for the mechanical cleaning of foundry used sand by means of thermomechanical regenerations, in which the sand is blown pneumatically against a deflection hood and the mechanical-pneumatic cleaning is performed batchwise in a separate container. The process can be used both as pre-cleaning and as after-cleaning. In the case of pre-cleaning there is a simultaneous drying, preheating, pre-cleaning and sifting, whereas with after-cleaning there is a simultaneous cooling, after-cleaning and sifting. As a result of the batchwise operation, all the quartz particles are exposed roughly to the same friction treatment and consequently, in conjunction with a simple control of the cleaning process, reduced grain destruction is achieved. | ||||||
| 34 | Process for the selective reclamation treatment of used foundry sand | US745009 | 1991-08-14 | US5219123A | 1993-06-15 | Hermann Jacob |
| A process for the selective reclamation treatment of used foundry sands wherein separation of parts of the binding materials from the basic granular material is effected by mechanical means and, thereafter, the sand grains are accelerated to produce an abrasive action of the individual sand grains with one another. The treated grains are then separated into large and small grains and further treatment is effected on the small grains. | ||||||
| 35 | Process for reclaiming bentonite and carbon particles from used foundry sand | US797391 | 1991-11-25 | US5163562A | 1992-11-17 | Ludwig Wilhelm; Peter Rossmanith |
| A process for separating bentonite and carbon carrier particles from an air-dust mixture generated from a mechanical used-sand reclamation unit and, more particularly, a process as aforesaid wherein the bentonite and carbon carrier particles are recycled to a foundry sand preparation unit. | ||||||
| 36 | Process for treating old foundry sand for reuse in place of core sand | US754961 | 1991-09-04 | US5163496A | 1992-11-17 | Hermann Jacob |
| The present invention relates to a process for treating old foundry sand for reuse in place of core sand wherein the precleaned sand grains are subjected to further abrasive-thermal treatment so as to volatize and remove basic constituents adhering to the precleaned sand grains. | ||||||
| 37 | Method for separating hazardous substances in waste foundry sands | US500480 | 1990-03-28 | US4978076A | 1990-12-18 | Robert S. L. Andrews; Gerald J. Reier |
| Hazardous substances are separated from used foundry sand by means of a triple fluid bed thermal reactor, second stage sand cooler and third stage pneumatic attrition scrubber. Temperatures in each of the reactor's beds are precisely controlled, depending upon the nature of the sand being treated, so that hazardous substances can be separated and disposed of, rather than fixing the substances onto the sand grains in insoluble form. | ||||||
| 38 | Method of reclaiming green sand | US8748 | 1987-01-30 | US4709862A | 1987-12-01 | Dieter S. Leidel |
| A method for reclaiming green sands having a wide range of moisture and temperature conditions involves processing such sands in a single reclaimer unit to produce free flowing reclaimed sand adapted to pass through a 20 mesh screen and having a temperature preferably no greater than about 120.degree. F. The method involves effecting attrition of a batch of molding sand supplied to the reclaimer unit, applying a vacuum exhaust to the unit primarily to remove a calcined clay binder and water vapor therefrom, sensing the means temperature of the sand, and selectively adding moisture or heat to the sand as required to produce reclaimed sand having predetermined moisture and temperature conditions allowing such sand to be immediately screened of extraneous materials and passed to a mulling device or remixer. The rate of addition of moisture, if any, and the flow of exhaust air through the unit are controlled in order to prevent condensation in the exhaust conduit and dust collection devices. | ||||||
| 39 | Process and apparatus for reclaiming foundry scrap sands | US734744 | 1985-05-15 | US4700766A | 1987-10-20 | Volker Godderidge |
| In a process for reclaiming foundry scrap sand, containing organic and inorganic binders, the comminuted foundry sand is precleaned in a dry state by allowing it to impinge and/or by grain-against-grain friction, is regenerated by thermal treatment, and is subsequently subjected to a final cleaning in the dry state, separated slurry materials being separated from the regenerate by a gas stream. An apparatus for conducting the process comprises a rotary drum (5, 46, 107) and/or a shotblasting cleaner (102) for precleaning, a fluidized-bed furnace (9, 51, 108) for thermal regeneration, and a further rotary drum (10, 59, 109) and/or a further shotblasting cleaner (151) for the final cleaning, and is accommodated in several container-type vessels (I through IX) which latter can be set up in superimposed relationship. | ||||||
| 40 | Process for thermal and pneumatic treatment of granular solids | US639395 | 1984-08-10 | US4569696A | 1986-02-11 | William A. Sandstrom; Jitendra G. Patel; John R. Bush |
| Granular solids are thermally and pneumatically treated to remove organic and inorganic chemical additives which are bonded to the granular solids or in admixture with them, to provide a purified granular solid product which is suitable for reuse, for example foundry sand for use in high strength molded cores, or for other productive uses, such as landfill. Granular solid feed material is preheated in a dilute phase zone of a fluidized bed, organic chemical additives are thermally oxidized in a dense phase zone of the fluidized bed, and remaining inorganic chemical additives are separated and removed from the granular solids in a contiguous pneumatic impaction zone. The purified granular solids are removed from the pneumatic impaction zone and organic and inorganic materials are elutriated from the fluidized bed and removed from the head space. | ||||||
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