When changing the mold, you can use the appropriate drawing angle, use the parting line and use the software simulation analysis to draw the mold.

1. Suitable draft angle: the draft angle is between 1 and 3 degrees, depending on material characteristics, wall thickness and surface quality requirements. The draft angle should be large enough to make the parts slide out of the mold smoothly, but not too large to avoid affecting the accuracy of the parts.

2. Use parting line: The parting line should be as straight as possible to avoid complicated shape, which helps to reduce the difficulty of drawing. Setting the parting line on the symmetrical line according to the situation can simplify the mold design and reduce the manufacturing cost.

3. Simulation analysis with software: Drawing analysis with CAE parts can predict potential problems and optimize design.