| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 81 | MOLDING SAND COOLER | US15552412 | 2016-03-18 | US20180029108A1 | 2018-02-01 | Andreas Seiler; Feng Li; Stefan Gerl |
| The present invention concerns a casting sand cooler comprising a sand chamber having an air inlet optionally with a fan for the feed of air into the sand chamber and an air outlet optionally with a fan for sucking air out of the sand chamber. To provide an improved casting sand cooler in which the sand discharge during the cooling operation by way of the air outlet is markedly reduced, it is proposed according to the invention that a dynamic wind sifter which is rotatable about an axis and which is so arranged that substantially the complete air flow leaving the sand chamber through the air outlet is passed through the dynamic wind sifter. | ||||||
| 82 | Products for the manufacture of molds and cores used in metal casting and a method for their manufacture and recycle from crushed rock | US10676159 | 2003-10-02 | US20050034832A1 | 2005-02-17 | Robert Sparks; Kenneth 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. | ||||||
| 83 | 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 | US20030111202A1 | 2003-06-19 | 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. | ||||||
| 84 | 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 | US20020110044A1 | 2002-08-15 | 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. | ||||||
| 85 | Process for the reclamation of used foundry sand | US431120 | 1995-04-28 | US5706879A | 1998-01-13 | Christian Renner; Xaver Naf; Jovo Laskovic |
| An apparatus for reclaiming used foundry and molding sand comprises a container having a cylinder sidewall and at least one bottom wall or tray is arranged on a sand reclamation device for the mechanical cleaning of grains of sand, particularly organically and inorganically bonded molding sands. A central, hollow drive shaft is arranged in the cylinder and is supported for rotation. The bottom walls are firmly attached to the hollow shaft. A slot is formed between the bottom walls and cylinder. By the rotation of the bottom walls a parting plane is formed between the rotating part and the stationary part of the column of sand, in which plane an intensive rubbing of grain against grain takes place. As a result of the cylindrical force, the sand is brought in the direction towards the wall of the cylinder and through the slot, which additionally leads to an intensive rubbing of grain against grain. The powder produced upon the rubbing, primarily binder particles which have been rubbed off, is drawn off continuously through the hollow shaft by means of the suction via openings which are provided in the hollow shaft. | ||||||
| 86 | Method and apparatus for regulating the sand discharge during the thermal regeneration of used foundry sand in fluidized bed kilns | US60255 | 1993-05-12 | US5404655A | 1995-04-11 | Volker Godderidge; Walter Stuzmann |
| The invention relates to a method for regulating the sand discharge by means of a discharge pipe located on the opposite side of a sand charging means of a fluidized bed kiln in connection with the thermal regeneration of old foundry sand, in which the base of the fluidized bed kiln has openings through which the hot gases pass into the fluidized bed. The method is characterized in that the sand exit from the discharge pipe (4) is freed by increasing the air supply in a pneumatic conveyor (5) following the fluidized bed kiln (1) through its perforated base (7) in such a way that the pouring cone (6) formed between the end of the discharge pipe (4) and the base (7) is decreased and consequently the exit of the discharge pipe (4) is freed. | ||||||
| 87 | Fluidized bed apparatus and method using same | US56566 | 1993-05-03 | US5332139A | 1994-07-26 | James E. Heath; John R. Eppeland; James S. Nelson |
| An apparatus is disclosed for heat treating a product. The apparatus includes a retort having a volume sized to receive a bed of fluidized particles having a predetermined elevation within the volume and a plurality of electrically powered infrared radiation sources. The sources are submerged within the bed of fluidized particles. Use of the apparatus to reclaim foundry sand is also disclosed. | ||||||
| 88 | Method for the treatment of foundry sand and/or core sand | US645123 | 1991-01-24 | US5167270A | 1992-12-01 | Ivo Henych |
| A method for the re-processing of used foundry sand comprises a two cycle system including a conventional processing system for foundry sand and a second locally independent regeneration system for the recovery of the usuable components of the used sand such as carbon dust and bentonite. | ||||||
| 89 | Method and means for treating foundry sands and the like | US714496 | 1985-03-21 | US4671867A | 1987-06-09 | Gabriel Battie; Yves Bonnel |
| The subject matter of the invention mainly relates to the technical areas of foundry, manufacture of parts by casting metal in moulds.The process consists in that after moulding the parts and stripping them from the moulds which were broken, during a first cycle the mixture resulting from the knock-out is recovered. This mixture being stored. This mixture is directed from the storage place to an intermediate container; then the mixture from the intermediate container is fed up to a sieve grading separator unit allowing to separate the grains or particles in several different grading batches; each one of these batches is directed to a separating table designed for separating chromite from silica; the chromite on the one hand and the silica on the other hand are recovered in containers.This invention mainly applies to the recovery of components of different densities, especially chromite and silica. | ||||||
| 90 | Apparatus for thermal and pneumatic treatment of granular solids | US796008 | 1985-11-07 | US4636168A | 1987-01-13 | William A. Sandstrom; Jitendra G. Patel; John R. Bush |
| An apparatus for thermally and pneumatically treating granular solids 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. | ||||||
| 91 | Method of reclaiming foundry sand | US674595 | 1984-11-26 | US4549698A | 1985-10-29 | Robert S. L. Andrews |
| A method and apparatus for reclaiming used foundry sands including organic resin-bonded sands and clay-bonded sands is shown. The method includes passing used sand downward through a series of vertical, fluid sand beds. Hot air is forced upward in countercurrent fashion through the beds in turn so that a boiling action is achieved in the sand masses. The combination of thermal and abrasive action removes both organic resin and clay-bonded materials from the sand in one continuous operation. | ||||||
| 92 | Apparatus with heat exchange means and transfer pipe for treating solid, granular and aggregate materials | US521494 | 1983-08-08 | US4533087A | 1985-08-06 | Vagn Deve |
| An apparatus (14) embodying heat exchange means for treating solid, granular and aggregate materials, and in particular for treating spent, i.e., used, chemically bonded foundry sand. The subject apparatus (14) includes a rotatable first chamber means (16) and a rotatable second chamber means (30). The used foundry sand is preheated while traveling from one end thereof to the other end thereof through the first and second chamber means (16, 30). From the second chamber means (30) the preheated used foundry sand is suitably conveyed to a thermal reclaimer means (12) for purposes of thermally removing organic matter therefrom. Thereafter, the used foundry sand is conveyed to a fluidizing chamber means (48) which is located in surrounding heat exchange relation to the first chamber means (16). As the used foundry sand flows in a second direction through the fluidizing chamber means (48), heat is exchanged between the foundry sand traveling through the fluidizing chamber means (48) and the foundry sand traveling through the first chamber means (16) such that the former loses heat, i.e., is being cooled, and the latter absorbs heat, i.e., is being preheated. | ||||||
| 93 | Method and apparatus for reclaiming foundry sand | US554381 | 1983-11-25 | US4491277A | 1985-01-01 | Hans Bauer; Heinz-Withold Schmitz |
| A method and apparatus for reclaiming foundry sand from contaminated foundry sand wherein ferromagnetic contaminants are first removed in a magnetic separating zone, and the remaining contaminated sand is thermally treated at a temperature sufficiently high to cause embrittlement of clay constituents among the remaining contaminants, and finally the thermally treated material is comminuted, preferably in a counterflow impact jet mill to recover a reclaimed foundry sand substantially free from contaminants. | ||||||
| 94 | Thermal sand reclamation system | US369069 | 1982-04-16 | US4487372A | 1984-12-11 | Vagn Deve |
| A system (10) particularly suited for reclaming used foundry sand by means of thermal reclamation. The subject system (10) includes, arranged in cooperatively associated series relation, thermal reclaimer means (14), post reclaimer means (15), primary cooling means (16), separator means (18), classifying and dust removal means (19), scrubber means (20) and secondary cooling means (22). The used sand, which preferably is first fed through a lump-crusher, shake-out apparatus (12), is made to pass through thermal reclaimer means (14) while being heated to a predetermined temperature for a preestablished period of time in order to accomplish the burning away of the organic materials, i.e., matter, which are present in the used sand. From the thermal reclaimer means (14), the used sand passes to and through the post reclaimer means 15 for further reclaiming and then to and through the primary cooling means (16) wherein the heated sand is cooled to a suitable temperature. The separator means (18) is operative to effect the removal of tramp metal from the cooled, thermally reclaimed sand. Thereafter, the cooled, thermally reclaimed sand is made to pass through the classifying and dust removal means (19) for classifying and removal of dust and fines and then through the scrubber means (20) wherein the dust associated with the particles of sand is removed therefrom. Finally, the substantially dust-free, cooled, thermally reclaimed sand passes through the secondary cooling means (22) wherein the sand is further cooled to substantially ambient temperature. | ||||||
| 95 | Foundry sand reclamation | US28134 | 1979-04-09 | US4449566A | 1984-05-22 | Anthony J. Filipovitch; Julius M. Bleuenstein |
| A dry method of conditioning spent foundry sand is disclosed. After having sized the sand and removal of tramp metallic elements, the sand is subjected to a sequence of squeezing under a high-stress low kinetic energy system for a period of 5-30 minutes, and then propelled against a target with high-kenitic energy in the presence of a suction for several minutes. This sequence can be preferably repeated to increase the quality of the resulting product which should have 0.1% or less of fine particles, a pH of 6-9, a clay content and organic combustible content of substantially zero. The reclaimed sand will exhibit a density of at least 100 grams/biscuit when compacted for core making or molding. | ||||||
| 96 | Method of and apparatus for treating granular material | US330864 | 1981-12-15 | US4437834A | 1984-03-20 | Alfredo Vogel |
| A method and apparatus for treating granular materials which require to be heated to drive off volatile constituents and which require to be cooled, for example foundry sand containing an organic binder. The method comprises the step of maintaining a mass of the material at a treatment temperature lying in the range 240.degree. C.-400.degree. C. for between four and thirty hours. The mass may be initially heated by virtue of a manufacturing process in which the mass has been previously used. Alternatively, the mass may be initially heated by a preheating step such as heating in a fluidized bed. Alternatively, the mass may be heated by being placed in heat transfer relationship with a second mass of the material which has been previously heated, for example, in a fluidized bed. Apparatus for performing the method is also disclosed. | ||||||
| 97 | Method of fixing hazardous substances in waste foundry sand | US301459 | 1981-09-14 | US4408985A | 1983-10-11 | Mark A. Anderson; Robert W. Balliett; Paul E. Link; Donald P. Satchell |
| A method is disclosed for fixing certain dangerous substances into recyclable waste foundry sand so that they are less likely to leach out into the environment. The method uses a roasting process which causes the dangerous substances to form insoluble compounds with the sand. One example is shown where hazardous waste foundry sand which contains acetic acid soluble lead contamination is treated by this method. In this example the lead is believed to react with the sand during the roasting process forming compounds such as lead silicate which are insoluble to acetic acid. The amount of lead which may be leached out into the environment is reduced to a safe level according to the currently accepted test methods promulgated by the U.S. Environmental Protection Agency. The method may be applied to the conversion of waste foundry sand into reusable sand or landfill which are less likely to leach dangerous substances into the environment. | ||||||
| 98 | Abrasive blast cleaning system | US30676972 | 1972-11-15 | US3829029A | 1974-08-13 | CARPENTER J; BOWLING J |
| An abrasive blast cleaning system includes blast means for granulating and scouring the sand removed from a no-bake mold whereby the sand is reconditioned for reuse in a subsequent nobake molding operation.
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| 99 | Abrasive blast cleaning system | US3716947D | 1971-01-21 | US3716947A | 1973-02-20 | CARPENTER J; BOWLING J |
| An abrasive blast cleaning system includes blast means for granulating and scouring the sand removed from a no-bake mold whereby the sand is reconditioned for reuse in a subsequent nobake molding operation.
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| 100 | Device for regaining components of knocked-out mold and core sand and pieces | US3552662D | 1968-12-20 | US3552662A | 1971-01-05 | GROB KONRAD |
| A device for regaining components of knocked-out mold and core sand pieces, in which said knocked-out pieces are crushed in a container and conveyed through perforations to a separator for filtering out the dust component from the crushed material and feeding the remainder into a storage container.
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