Integrated system and process for heat treating castings and reclaiming sand
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B22D-029/00
B02C-019/12
출원번호
US-0802763
(1997-02-20)
발명자
/ 주소
Crafton Scott P.
출원인 / 주소
Consolidated Engineering Co, Inc.
대리인 / 주소
Isaf, Vaughan & Kerr
인용정보
피인용 횟수 :
27인용 특허 :
0
초록▼
Provided is a five-in-one process/integrated furnace system that (i) receives and heat treats a casting, (ii) removes sand core materials from the casting, (iii) actively reclaims sand from the sand core materials, (iv) substantially cools the reclaimed sand, and (v) removes fines from the reclaimed
Provided is a five-in-one process/integrated furnace system that (i) receives and heat treats a casting, (ii) removes sand core materials from the casting, (iii) actively reclaims sand from the sand core materials, (iv) substantially cools the reclaimed sand, and (v) removes fines from the reclaimed sand. The furnace system includes a heating chamber disposed above and contiguous with a cooling chamber. The heating chamber and cooling chamber are preferably constructed so that heat and gasses pass therebetween. The heating chamber is preferably in the general form of a heat treating furnace. The heating chamber receives and heat treats metal castings. During the heat treating process, sand core materials are dislodged from the castings and enter into a sand reclaiming region. A hot fluidized bed functions to reclaim sand from the sand core materials within the heating chamber. The sand reclaimed in the hot fluidized bed falls into a cool fluidized bed in the cooling chamber which is preferably directly beneath the heating chamber. Gasses are drawn from above the cool fluidized bed in a manner that removes fines and heat from the reclaimed sand. The fines are separated from the heated gasses, which are used in the hot fluidized bed.
대표청구항▼
[ I claim:] [1.] A method for processing a casting having a sand core and reclaiming sand from the sand core, the sand core comprising sand particles bound together by a binder material, the sane core defining a cavity within the casting, and the method comprising the steps of:containing the casting
[ I claim:] [1.] A method for processing a casting having a sand core and reclaiming sand from the sand core, the sand core comprising sand particles bound together by a binder material, the sane core defining a cavity within the casting, and the method comprising the steps of:containing the casting, with at least a portion of the sand core therein, in a chamber within a furnace system;heating the chamber to a temperature sufficient to loosen a portion of the sand core such that portions of the sand core are loosened from the cavity and exit the casting while the casting is within the furnace system,subjecting portions of the sand core that exit the casting within the chamber to a first fluidizing step, while heating the binder material of said portions and reclaiming sand therefrom;discharging the reclaimed and fluidized sand from the chamber into a cooling chamber of said furnace system;cooling the reclaimed sand, wherein the cooling step includes the further step of a second fluidizing of the sand within the cooling chamber by gases introduced therein at an introduction temperature, whereby, through a heat transfer between said fluidized sand and said gases, said gases are heated within said cooling. chamber to a temperature above said introduction temperature; and,collecting the heated gases from the cooling chamber and utilizing the heated gases in said first fluidizing step. [17.] A furnace system for processing a casting having sand core material attached thereto and reclaiming sand from the sand core material, the sand core material comprising sand particles bound together by a binder material, the sand core material defining a cavity within the casting, and the furnace system comprising:a heating work chamber for receiving the casting therewithin;heating means for heating said heating work chamber to a temperature sufficient to pyrolize binder material of the sand core, whereby portions of the sand core material are loosened and exit from the casting while the casting is within said heating work chamber;a reclaiming fluidizer within said work chamber for substantially reclaiming sand from portions of the sand core material, anda cooling fluidizer for receiving the reclaimed sand from said reclaiming fluidizer and cooling the reclaimed sand, wherein said cooling fluidizer is proximate to and in heat and gaseous communication with said reclaiming fluidizer. The furnace system of claim 17, wherein said work chamber defines a casting conveyor region and a fluidized region separate from said conveyor region, said reclaiming fluidizer being disposed within said fluidizer region. The furnace system of claim 17, wherein said work chamber defines a fluidizer region and said reclaiming fluidizer is disposed within said fluidizer region, and wherein the furnace system further comprises a conveyor within said fluidizer region of said work chamber, whereby castings are conveyed by the conveyor through the fluidizer region.
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이 특허를 인용한 특허 (27)
Crafton Scott P. ; Lewis ; Jr. James L., Combination conduction/convection furnace.
Crafton, Scott P.; Crafton, Paul M.; Knobloch, Volker R.; Lewis, Jr., James L.; French, Ian, Method and apparatus for assisting removal of sand moldings from castings.
Lewis, Jr.,James L.; French,Ian; Knobloch,Volker R.; Crafton,Scott P.; Crafton,Paul M.; Garrett,James R.; Dalton,John W., Method and apparatus for assisting removal of sand moldings from castings.
Crafton, Scott P.; Crafton, Paul M.; Knobloch, Volker R.; Lewis, Jr., James L.; French, Ian, Methods and apparatus for heat treatment and sand removal for castings.
Crafton, Scott P.; Crafton, Paul M.; Knobloch, Volker R.; Lewis, Jr., James L.; French, Ian; Ruegg, Franz, Methods and apparatus for heat treatment and sand removal for castings.
Crafton,Scott P.; Crafton,Paul M.; Knobloch,Volker R.; Lewis, Jr.,James L.; French,Ian, Methods and apparatus for heat treatment and sand removal for castings.
Crafton,Scott P.; Crafton,Paul M.; Knobloch,Volker R.; Lewis, Jr.,James L.; French,Ian; Ruegg,Franz, Methods and apparatus for heat treatment and sand removal for castings.
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