| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 61 | Process for regenerating used foundry sand | US967526 | 1992-10-27 | US5279741A | 1994-01-18 | Klaus Schott |
| The invention relates to a process for regenerating used foundry sand, whose original molding sand contained, as the molding material, inorganic binders such as, for example and especially, bentonite ("inorganic used sand") and/or organic binders such as, for example and especially, phenolic resins and/or furan resins ("organic used sand"), wherein the used sand to be reconditioned is impregnated with water and then transferred in the moist state into a heated fluidized bed. | ||||||
| 62 | Dry thermal processor | US511904 | 1990-04-23 | US5217578A | 1993-06-08 | William Taciuk; Roderick Caple; Sean Goodwin; Gordon Taciuk |
| The processor is of the type incorporating horizontal, concentric, co-extensive inner and outer tubular members which rotate together. The processor is modified in the following respects:The front end of the inner tubular member is circumferentially corrugated and may be provided in the form of a plurality of parallel tubes arranged in a ring array, to thereby increase the shell area to promote heat transfer through the tube walls;Means are provided for interconnecting the tubular members, which means can accommodate differing rates of thermal expansion and;a rock recycle tube assembly is provided to recover oversize material leaving the corrugated portion of the inner tubular member and reject it from the processor. | ||||||
| 63 | 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. | ||||||
| 64 | Gravity flow thermal process for reclaiming foundry sand | US476813 | 1990-02-08 | US5110288A | 1992-05-05 | John J. Rothschild; James L. Donahue |
| A method and apparatus for thermally reclaiming used foundry sand is disclosed. The apparatus includes a vertically disposed furnace having a combustion chamber therein. A sand dispersion system supported within the combustion chamber disperses the free falling sand particles to expose the particles to a combustion supporting furnace environment. Disposed immediately below the furnace is a sand retention chamber in which the sand is accumulated. Heated air is introduced into the retention chamber to maintain the combustion supporting environment. Residual coatings remaining on the sand particles are thermally removed in the retention chamber. | ||||||
| 65 | Apparatus for heat treating contaminated particulate material | US382228 | 1989-07-20 | US4941822A | 1990-07-17 | Marvin Evans; David H. Miller |
| An apparatus for heat treating contaminated particulate material and more particularly, an apparatus for reclaiming foundry sand. The apparatus includes a heated, inclined rotary drum and an auger projects into the upstream end of the drum and serves to feed material to the drum. The auger includes a spiral flight carried by a hollow shaft and a blower is connected to the outer end of the hollow shaft so that air is supplied through the shaft into the drum. A seal is provided between the non-rotating auger housing and the drum, and the seal includes an annular bearing plate mounted on the end of the drum while a sealing ring is connected to the auger housing and is biased against the plate to provide a seal. The excess air in the heated drum burns off the organic contaminates from the particulate material and calcines the mineral contaminates. The treated particulate material is transferred from the downstream end of the drum to a second cooling drum and air is passed through the second drum countercurrently to movement of the particulate material to cool the material. | ||||||
| 66 | Sand reclamation system with thermal pipe reclaimer apparatus | US521495 | 1983-08-08 | US4565328A | 1986-01-21 | Vagn Deve |
| A system (10) particularly suited for treating solid, granular and aggregate material by means of thermal reclamation. The subject (10) includes, arranged in cooperatively associated series relation, storage hopper means (12), heat exchanger means (14), thermal pipe reclaimer means (16) and cyclone scrubber means (18). The function of the storage hopper means (12) is to store therewithin a suitable supply of grain size material, which is to be treated. At a preestablished rate the material is fed from the storage hopper means (12) to the heat exchanger means (14). While traveling through the heat exchanger means (14) the material is preheated to a first temperature. From the heat exchanger means (14) after undergoing metal separation and crushing of lumps, the material is supplied to the thermal pipe reclaimer means (16) wherein the material is heated to a specified temperature for a predetermined period of time in order to effect the burning away of organic matter which the material embodies. After leaving the thermal pipe reclaimer means (16) the material travels to the cyclone/scrubber means (18) wherein the surface of the grain size material is cleansed and post reclamation of the material occurs. The material, which is now at a second temperature, is then again conveyed to the heat exchanger means (14) whereupon during the course of traveling therethrough the material is cooled to a suitable temperature. | ||||||
| 67 | Heat exchanger with bulk material retarder system | US624295 | 1984-06-25 | US4546821A | 1985-10-15 | Joachim Kummel |
| A heat exchanger consisting of a housing (1) with integrated caloric surfaces (3) for cooling bulk materials (8)--in particular hot foundry molding sands--comprises a retarder system in the form of a sand cascade which consists of an upper perforated plate (9) with many small individual holes (11), of a lower perforated plate (12) with few individual holes (12), said perforated plates being spaced apart by perforated plates (4,15), the sand flow through the slide system (5,6,14) being controllable and sealable.The passage holes may assume the shapes of triangular, longitudinal or T slots in order to operate such a retarder cooler over a large range of regulation.The perforated spacer plates (4) moreover form a support plate with high static load capacities to absorb the substantial weights of the bulk materials.The holes (15) of the spacer plates (4) allow the retarded material to flow and float in the cascade chambers and thereby assure the transit of the bulk material in uniform manner through the upper cascade plate holes (11) for all loads. | ||||||
| 68 | Apparatus with heat exchange means for treating solid, granular and aggregate materials | US521498 | 1983-08-08 | US4507081A | 1985-03-26 | 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) in which the used foundry sand is preheated while traveling in a first direction therethrough from one end thereof to the other end thereof. From the first chamber means (16) 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 second chamber means (44) wherein the used foundry sand undergoes post reclamation whereby any organic matter that may yet remain in the foundry sand is thermally removed therefrom. From the second chamber means (44) the used foundry is made to pass into a third chamber means (52) which is located in surrounding heat exchange relation to the first chamber means (16). As the used foundry sand flows through the third chamber means (52) in a second direction heat is exchanged between the foundry sand traveling through the third chamber means (52) 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. | ||||||
| 69 | Air cooling system for a vibratory sand reclaiming apparatus | US309560 | 1981-10-08 | US4415444A | 1983-11-15 | William G. Guptail |
| Cooling air is introduced into the vibrating chamber of a sand reclaiming apparatus. A plurality of hollow inverted V-shaped ribs, extending longitudinally along the floor of the chamber distribute the air from an external source over the bottom region of the chamber. A gap is included between the lower edges of the ribs and the chamber floor. The air traveling within the hollow of the ribs is expanded about the lower edges of the ribs and directed upwardly through the bonded sand particles to effect cooling. | ||||||
| 70 | System and process for abatement of casting pollution, reclaiming resin bonded sand, and/or recovering a low BTU fuel from castings | US130256 | 1980-03-14 | US4325424A | 1982-04-20 | Karl D. Scheffer |
| A low vacuum is applied to selected surface areas of a resin bonded sand mold to draw ambient air into selected portions of the mold. The air entering the mold burns out a significant portion of the resin binder to form a low BTU gas fuel and to recover casting heat for use in a waste heat boiler or other heat abstractions device. Therefore, foundry air pollution is reduced, the burned out portion of the molding sand is recovered for immediate reuse, and a savings in fuel and energy. | ||||||
| 71 | Method and apparatus for cooling foundry sand | US63577 | 1979-08-03 | US4252001A | 1981-02-24 | Albert Musschoot |
| The invention discloses a method and apparatus for cooling hot foundry sand. The method includes the step of adding water to the hot sand with the quantity of water being related to the Btu content of the sand, vibrating the sand/water mix in a closed container, evacuating the container to evaporate the water and cool the sand, and then removing the cooled sand from the container. Apparatus for carrying out the foregoing steps is also disclosed. | ||||||
| 72 | Method and apparatus for cooling recycled foundry sand | US818653 | 1977-07-25 | US4141404A | 1979-02-27 | Carl R. McMullen |
| A sand cooler control system for a sand casting foundry system incorporates a cooling system positioned downstream of the shakeout station where castings are separated from the hot sand. The amount of cooling fluid utilized in the cooling process is controlled by a digital system responsive to the total heat (BTU) content of the sand as determined by a combined function of sand temperature and volume. The temperature and volume parameters are determined by non-contact sensors which take the form of an infrared sensor and sonic sensor, respectively. | ||||||
| 73 | Process for reclaiming foundry sand wastes | US796018 | 1977-05-11 | US4130436A | 1978-12-19 | Karl V. Hauser; Fred Mencenberg |
| A process for treating waste foundry core and/or molding sand in a manner which upgrades these scrap streams to new sand quality for entry at the core making point. The process consists of incrementally heating the sand as required up to temperatures in the 1800.degree. to 2500.degree. F range, followed by cooling. The degree of heating is chosen to achieve a desired lowering of acid demand value (ADV) from that which would result from heating only to conventional high temperatures, about 1500.degree. F. Lowering of ADV reduces the variability which would otherwise be introduced into a mixture of new and recycled sand for cores.Heating waste molding sand to the temperatures contemplated by the method of this invention also causes clay additives to fuse, become non-absorptive and thus eliminating the need for mechanical attrition which would otherwise be needed to remove the clay so that it would not absorb high quantities of resin in the core making process. The inventive method also burns off resins from the sand being treated in a manner which eliminates environmental pollution. | ||||||
| 74 | Apparatus for purifying particulate mould material | US545014 | 1975-01-29 | US4089081A | 1978-05-16 | Hermann Jacob |
| Apparatus for purifying foundry sand which involves the passage of sand through layers of steel wool supported on perforated discs mounted on a vertical shaft in a standpipe. Perforations in the sides of the standpipe permit air to be blown through the sand as it drops down through the steel wool. The vertical shaft supporting the discs and steel wool is vibrated to cause the sand to move through and past the packs of steel wool. | ||||||
| 75 | Method of cooling recovered sand for casting purposes and apparatus therefor | US564904 | 1975-04-03 | US4037648A | 1977-07-26 | Sisir Kumar Maitra |
| Method and apparatus for the substantially continuous cooling of recovered casting sand in discrete compartments of a bunker whereby the sand in each compartment is cooled while substantially at rest in heat exchange relation with heat exchanger means disposed within the compartment, and the sand thoughput through the compartments is controlled by gates. | ||||||
| 76 | Apparatus for cooling or drying pourable material | US35566473 | 1973-04-30 | US3837092A | 1974-09-24 | MAYER O |
| Pourable material is introduced into the upper end of a tank and moves downwardly about a centrally arranged feed pipe perforated along its length for introducing a gaseous medium into the material, and the material is removed from the bottom of the tank. Horizontally arranged, vertically spaced ring discs are located outwardly from the feed pipe and inwardly from the tank so that the downwardly moving pourable material enters between adjacent ring discs and forms a frusto-conically shaped layer of material. By varying the cross sectional size of the openings in the feed pipe and/or varying the size and/or spacing of the ring discs the treatment of the pourable material by the gaseous medium can be varied.
|
||||||
| 77 | Apparatus for moistening mixable materials | US33895673 | 1973-03-07 | US3826476A | 1974-07-30 | AHRENBERG K |
| For controlling the moistening of mixable materials, particularly the moistening of foundry casting sand with water, a high-speed low-inertia auxiliary mixing tool is rotated in the sand and the quantity of water added is determined in dependence on the resistance of the sand to rotation of the tool as measured by the power consumption of an electric motor driving the tool. Since the materials used are required to be at a certain starting temperature, the temperature of the material is automatically adjusted prior to commencing the moistening operation.
|
||||||
| 78 | Apparatus and method for controlling moisture content of granular materials | US3796412D | 1972-10-03 | US3796412A | 1974-03-12 | MAURER E |
| Granular material is fed to a mixing drum, and a plurality of controllable nozzles are aligned with the interior of the mixing drum for selectively introducing water into the mixing drum. A control circuit is responsive to at least one of the power input and the driving torque of the drive means for the mixing drum, to control a main control valve which controls the total quantity of water per unit time delivered into the interior of the mixing drum. The control circuit may also be responsive to the temperature of the granular material fed to the mixing drum for further control of the main control valve. A pressure control device is provided between the main control valve and the nozzles to maintain the water pressure between predetermined boundary values so that water is delivered to said drum with an approximately constant droplet size.
|
||||||
| 79 | Apparatus for moistening mixable materials | US3727894D | 1969-11-13 | US3727894A | 1973-04-17 | AHRENBERG K |
| The invention relates to methods of controlling the moistening of mixable materials and to apparatus for carrying out the methods. The invention is particularly applicable to the moistening of foundry casting sand with water. In one method of high-speed low-inertia auxiliary mixing tool is rotated in the sand and the quantity of water added is determined in dependence on the resistance of the sand to rotation of the tool as measured by the power consumption of an electric motor driving the tool. Also disclosed is apparatus for carrying out the method automatically.
|
||||||
| 80 | Method for reducing pollution in foundries | US3646987D | 1969-10-15 | US3646987A | 1972-03-07 | SCHUMACHER JOSEPH S |
| This invention relates to a method for reducing dust pollution in foundries that use sand molds for casting and recycle the used sand for subsequent molding operations. A quantity of sand is added to the used sand, preferably at the shakeout, so that the total amount of said weighs at least 12 times the weight of the metal previously cast.
|
||||||
QQ群二维码
意见反馈
意见反馈