llantas for Japan gtr sport ET 25-35 concave spoke design 14 15 16 inch PCD100-114.3 26×10 alloy wheels

improvement measures

(1) Reasonably designing the liquid system due to too long pressure preservation, or if the litter pipe is too long, the liquid in the lift tube is solidified, so that the wheel castings will bear a certain tensile when the pans are topped, which will cause the wheels to cause cold cracks. Therefore, the design is designed to design. A reasonable lift system is of great significance to reducing crack tendencies. The lift system refers to the channel where the liquid metal is entered into the type of the cavity during pouring, including the litter pipe, the insulation set and the casting the watering system. The size of these parts directly affects the inner liquid surface to cast
The distance between the pouring mouth. The longer this distance, the more cooling the liquid metal during this distance when pouring, the faster the cooling of the liquid, which is easy to cause early condensation of the lift pipe channel. Therefore, it should be noted: ① Short the distance between the inner liquid surface and the pouring port in the casting. This distance involves several aspects such as equipment, technology, and molds, so it is necessary to consider comprehensive considerations, and it is advisable to reduce this distance.
② Improve the insulation set. Properly increase the heating set of vendors to expand the thickness of the insulation layer; materials with good thermal insulation performance are used as a thermal insulation set, such as aluminum silicate fiber felt. ③ The diameter of the lift pipe is appropriately increased. In order to prevent early solidification of lift pipes, the diameter of the lift tube should be appropriately increased.
(2) When designing a reasonable wheel structure, when the wheel structure is designed, the sharp corner structure and cross -section should be avoided, and a uniform structure of round or thickness should be adopted.
(3) In the case where there is no casting defect, appropriately increase the temperature of the mold