Process Characteristics of Zinc and Aluminum Alloy Die Castings

1, wall thickness
<1> The minimum wall thickness of the die cast and the normal wall thickness are usually based on the casting area.
<2> In order to ensure good casting forming conditions. Casting the outer edge should maintain a certain wall thickness.
<3> When there is an insert on the casting, the metal layer around the stud should be thickened. To improve the clamping force with the insert. The thickness of the metal layer is selected directly by the insert.

2, cast hole die can be injected deep hole, hole depth and hole relationship

3, casting round radius of the mold out of the slope of casting diameter and wall thickness

4, screw suction die-casting outside the need to leave 0.2 ~ 0.3 mm plus margin. Internal snail is generally die-cast bottom hole, and then machine processing within the snail. Can also be directly die-cast internal snail.

5, convex suction, direct suction and net suction
(1) convex, direct suction must be cited only postal direction.
(2) net suction is mainly used to reduce or eliminate the large area of ​​the flat die-casting die surface flow marks or patterns and other defects, the shape of the network should be conducive to mold manufacturing and stripping

6, text and logo text size is generally not less than GB126-74 provisions of the No. 5 font, the text protruding height greater than 0.3mm, generally 0.5mm, the minimum width of the line is generally convex height of 1.5 times, take 0.8, the minimum spacing of lines 0.3mm, the modulus of 10-15 degrees, the line should avoid acute angle.

7, casting accuracy and machine plus margin (1), casting can be late to the size of the accuracy shown in Table 4-1-13. With the dimensional accuracy see. (2), die casting of the machine should be used when the smaller value.