The draft and direction of drawn plays vital role in the mold. The draft should be narrow in the direction of a drawn.
The direction in which the cavity plate is pulled, the direction of the cavity plate and the part is released is called a direction of drawn.
There are three types of draft. Positive draft, negative draft and neutral draft.
If there is a positive draft in the mold, the part is easily removed from the mold. Otherwise the part is trapped in the mold.
If the angle between perpendicular line of direction of drwan along side centre of part and direction of draft to the direction of drawn is less than 90° than it is a possitive draft.
If the angle between perpendicular line of direction of drwan along side centre of part and direction of draft to the direction of drawn is greater than 90° than it is a negative draft. And
If the direction of drawn and draft line is parallel than it is neutral draft. From the below fig you can understand easily.
