Method and apparatus for molding a light-alloy wheel
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B22C-009/28
B22D-029/00
B22D-033/04
출원번호
US-0780283
(1997-01-08)
우선권정보
JP-0157072 (1996-06-18)
발명자
/ 주소
Atari Masayuki,JPX
Murata Yasuyuki,JPX
Yamada Shun,JPX
Suzuki Yuichi,JPX
Abe Kishiro,JPX
Yoshimura Hisashi,JPX
Ishida Akira,JPX
출원인 / 주소
Topy Kogyo Kabushiki Kaisha, JPX
대리인 / 주소
Cushman Darby & Cushman Intellectual Property Group of Pillsbury Madison & Sutro, LLP
인용정보
피인용 횟수 :
10인용 특허 :
6
초록▼
A light-alloy wheel is cast using an apparatus wherein cores are moved by a cotter via a sliding mechanism. A sliding portion is isolated from molten metal so that locking at the sliding portion is unlikely to occur. The sliding mechanism can be of a small size and is disposed in an interior of a mo
A light-alloy wheel is cast using an apparatus wherein cores are moved by a cotter via a sliding mechanism. A sliding portion is isolated from molten metal so that locking at the sliding portion is unlikely to occur. The sliding mechanism can be of a small size and is disposed in an interior of a mold top segment with a relatively large gap between the cotter and the mold top segment. The gap assures a good heat dissipation from the mold top segment. In a molding method conducted using the apparatus, the cores may be positioned at a retracted position and extended before the molten metal has solidified to thereby remove blow holes in a cast wheel.
대표청구항▼
[ What is claimed is:] [1.] A method for molding a light-alloy wheel, conducted using a mold apparatus including a mold top segment, a mold bottom segment, at least two side segments, a plurality of lightener pocket cores, and a cotter, said mold top segment having a generally concave upper surface
[ What is claimed is:] [1.] A method for molding a light-alloy wheel, conducted using a mold apparatus including a mold top segment, a mold bottom segment, at least two side segments, a plurality of lightener pocket cores, and a cotter, said mold top segment having a generally concave upper surface defining a spacial interior therein and a plurality of holes formed therein, each of said cores being slidable relative to said mold top segment at a respective one of said holes and having a first end and a second end, said first end being movable between an extended position corresponding to a thick portion of a cast wheel and a full-retracted position in a respective one of said holes, said second end being movable in said spacial interior so as not to contact a molten light-alloy metal, said cotter slidably engaging said second end of each of said cores via a holder so that said second end moves between said extended position and said retracted position when said cotter is moved, said method comprising the steps of:closing said mold top segment, said mold bottom segment and said mold side segments to form a wheel mold cavity therebetween, keeping said first end of each of said cores at said extended position;supplying molten light-alloy metal into said wheel mold cavity to allow said supplied molten light-alloy metal to solidify;moving said cotter to thereby move each of said cores relative to said mold top segment so that said first end of each of said cores is retracted to said full-retracted position after said supplied molten light-alloy metal has solidified; andopening said mold top segment, said mold bottom segment and said mold side segments and taking a cast wheel out from said mold top segment, said mold bottom segment and said mold side segments. [2.] A method for molding a light-alloy wheel, conducted using a mold apparatus including a mold top segment, a mold bottom segment, at least two side segments, a plurality of lightener pocket cores, and a cotter, said mold top segment having a generally concave upper surface defining a spacial interior therein and a plurality of holes formed therein, each of said cores being slidable relative to said mold top segment at a respective one of said holes and having a first end and a second end, said first end being movable between an extended position corresponding to a thick portion of a cast wheel and a full-retracted position in a respective one of said holes, said second end being movable in said spacial interior so as not to contact a molten light-alloy metal, said cotter slidably engaging said second end of each of said cores via a holder so that said second end moves between said extended position and said retracted position when said cotter is moved, said method comprising the steps of:closing said mold top segment, said mold bottom segment and said mold side segments to form a wheel mold cavity therebetween, keeping said first end of each of said cores at a position retracted from said extended position toward said full-retracted position;supplying molten light-alloy metal into said wheel mold cavity to allow said supplied molten light-alloy metal to partially-solidify;moving said cotter to thereby move each of said cores relative to said mold top segment so that said first end of each of said cores is fully protruded to said extended position and pushes the partially-solidified metal positioned in the thick portion of the cast wheel;moving said cotter to thereby move each of said cores relative to said mold top segment so that said first end of each of said cores is retracted to said full-retracted position after said supplied molten light-alloy metal has fully solidified; andopening said mold top segment, said mold bottom segment and said mold side segments and taking a cast wheel out from said mold top segment, said mold bottom segment and said mold side segments. [7.] A mold apparatus for molding a light-alloy wheel comprising:a mold top segment, a mold bottom segment and at least two mold side segments defining a mold cavity therebetween, said mold top segment having a generally concave upper surface defining a spacial interior and a plurality of holes formed therein;a plurality of lightener pocket cores each extending through a respective one of said holes formed in said mold top segment, each of said lightener cores including a first end and an opposite, second end, said first end being movable between an extended position corresponding to a thick portion of a cast wheel and a retracted position corresponding to a position in a respective said hole formed in said mold top segment, said second end being movable in said spacial interior defined by said generally concave upper surface of said mold top segment;a plurality of holders each holding said second end of a respective one of said lightener pocket cores; anda cotter located in said spacial interior defined by said generally concave upper surface of said mold top segment, said cotter including a slidably engaging portion which is isolated from a molten light-alloy and at which said cotter slidably engages each of said plurality of holders, said cotter being movable relative to said mold top segment and moving said plurality of lightener pocket cores via said plurality of holders.
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이 특허에 인용된 특허 (6)
Bortoloni Andrea (191 via Noventana Noventa Padovana ITX 35027 ), Die for casting vehicle wheel rims with tubular spokes and obtained wheel rim.
Herbert (Lonny) A. Rickman, Jr., Material for die casting tooling components, method for making same, and tooling components made from the material and process.
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