Light alloy wheel for vehicle and method and apparatus for producing same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 4, 2005
Grant Date -
Oct 31, 2002
app pub date -
Jan 10, 2002
filing date -
Jan 11, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A light alloy wheel for a vehicle comprising a disc portion comprising a hub portion and a design portion and a rim portion, the design portion having as-die-cast spoke portions having a taper angle of less than 5.0.degree.. This wheel can be produced by using a casting apparatus comprising a die assembly comprising at least a stationary lower die and a movable upper die, a movable platen to which the upper die is fixed, a first cylinder and at least three synchronous second cylinders mounted onto a frame of the apparatus for moving the movable platen; driving the first cylinder to slowly reduce the clamping force of the lower die and the upper die; synchronously driving the second cylinders to elevate the movable platen in parallel from a position at which the lower die and the upper die are clamped to a position at which the wheel would not impinge on the lower die even if the movable platen were slanted; and then further elevating the movable platen by the first cylinder.
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