1. Mould opening direction and parting line: They directly affect the mould demoulding and product’s appearance
2. Draft angle: It decides whether the product can be smoothly demoulded or not
3. The wall thickness and the rib of the product: It affects the strength of the product
4. Fillet: It affects the appearance and product’s molding
https://www.palletmouldfactory.com/product/auto-parts-mould/auto-interior-parts-1.html