Patent ID: 9604277
Date: 2017-03-28
CPC Classifications: B22C,B22D

Claim:
1. An integrated mould for low-pressure casting of wheels, comprising: an upper mould, integrated air-cooled side moulds and a lower mould, and further comprising: thermal deformation circular arc compensation surfaces with endpoints of (B), (D), (G) and (I), which pass through points (K) and (L) respectively, are formed by processing on upper and lower one-fourth circular arc matching surfaces of the integrated side moulds, that is on the circular arc surfaces of the integrated side moulds, which are matched with side walls of the upper mould and the lower mould; the two points, K and L, are located on the thermal deformation circular arc compensation surfaces, the distance from the point (K) to an original circular arc point (C) is from 0.2 mm to 0.5 mm, and the distance from the point (L) to an original circular arc point (H) is from 0.2 mm to 0.5 mm; the points (B) and (D) are located on an original circular arc of the lower one-fourth circular arc matching surface, the points (G) and (I) are located on an original circular arc of the lower one-fourth circular arc matching surface, and they are 60 to 80 mm apart from corresponding 45-degree matching surfaces respectively; compensation surfaces are formed by processing on the 45-degree matching surfaces of the adjacent integrated side moulds, such that when the 45-degree surfaces of the adjacent integrated side moulds are matched in a cold state, V-shaped gaps are formed on the 45-degree matching surfaces of the side moulds, and the clearance of the gaps on the circumference of the inner sides of the side moulds is 0.2 mm to 0.4 mm; and the 45-degree surfaces of the integrated side moulds are the matching surfaces of four side moulds.