What should be designed into a molded part to allow for release from mold halves?

A parting line is a critical feature in the design of a molded part, as it serves as the boundary where the two halves of the mold meet. This line is essential for the release of the molded part after the material has cooled and solidified.

The parting line determines how the mold opens and closes and influences the flow of the material into the mold cavitation. When the mold halves are separated, the parting line helps to eliminate any potential undercuts that may trap the part, ensuring that the component can be ejected smoothly. Moreover, a well-designed parting line facilitates the alignment of the mold halves during the injection process, which is vital for maintaining the quality and accuracy of the molded part.

The other options do not directly fulfill the requirement of aiding in the release from the mold. Threaded holes may be used for assembly or attachment but do not influence the demolding process. Vertical walls are important for the design and stability of the part but can create challenges in demolding if not aligned with the parting line. Undercuts typically complicate part removal from a mold, as they can cause the part to be trapped between the mold halves. Thus, having a proper parting line is fundamental for promoting a successful and