Mold design must be comprehensive and accurate; it should incorporate inserts and rely on machine precision to maintain strict tolerance control. During the fabrication of precision molds, many critical dimensions are strictly prohibited from having any draft angle. However, in actual practice-and to compensate for manufacturing errors-a minute draft angle is often permitted in specific areas, such as gear mounting posts. Nevertheless, when creating the digital model, meticulous attention must be paid to the precise adjustment of tolerances. Generally, the 3D models provided by clients may not be directly suitable for mold design, as their dimensions often represent extreme limit values. If the mold design proceeds directly based on this data, the final result will frequently fail to meet requirements-potentially rendering the mold completely unusable.
Furthermore, the completeness and accuracy of the technical drawings are paramount. In mold design, the use of inserts should be maximized, and the manufacturing processes must be thoroughly considered. Critical dimensions should, whenever possible, be guaranteed through machine precision rather than manual adjustment. During the mold fabrication process, skilled mold makers must strictly adhere to the drawings to ensure that every dimension meets the design specifications. Typically, the majority of mold components require strict tolerance control-a requirement that extends beyond just the working surfaces of the cavity and core to encompass the mounting locations and associated dimensions of all inserts, with tolerances typically maintained within a range of ±0.005.