What is a key feature that ensures a mold can release its product effectively?

A positive draft margin is crucial in mold design because it facilitates the easy removal of the molded product from the mold itself. A positive draft margin refers to the angle of the mold's walls, which should be slightly angled outward. This outward angle helps to reduce the friction between the mold and the product, minimizing the risk of sticking or damage during extraction.

In this case, a positive draft margin of at least 2° is considered effective, as it provides a sufficient angle to promote smooth release of the molded part without compromising the dimensional accuracy of the product. This additional angle helps to account for factors such as thermal expansion of the mold and the material, ensuring that even as the material cools and contracts, there is still adequate clearance for release.

While a 1° draft margin may offer some level of benefit, it is generally less effective than a 2° margin in ensuring that products can be released without difficulty. A surface texture with roughness can actually increase friction, making release more challenging, while the application of additional cooling fluids is focused primarily on managing temperature rather than improving release. Thus, the emphasis on a draft margin of at least 2° highlights the balance between effective product design and ease of manufacture.