5. The hole on the productThe hole is not smoothly:The depth of the hole should not exceed 3 times the diameter, if smaller diameter holes 5 mm (approx 3/16 inches), depth of the hole should be twice the recommended thickness, diameter of the bottom of the hole should be equal to 0.2 times the diameter of the hole to eliminate disability for the opposite side. A good design is the thickness of the hole evenly and does not always have the best corner next to where the focus of the application. b) Hole smoothly:The distance between the two holes or between holes with outer edge should be twice the thickness of a product or two times the size of the largest measured the circumference of the hole. When the middle of the holes are too small or complex affecting the casting process can change design for better fit. So the design to the direction of the vertical flow down under the hole to avoid welding line. If the welding line at levels unacceptable should not design hole that will drill holes to the product after the injection. Inside the hole should smooth balls to increase the ability to fill out.
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