The manufacturing cycle of an injection mold refers to the entire development process from mold design to delivery. The duration depends on various factors, including mold complexity, processing technology, material selection, and factory resources.
A typical injection mold manufacturing process can be divided into four main stages: mold design, mold processing, mold assembly, and mold trial and debugging.
Mold design is the core stage of mold development. The rationality of the design directly determines the mold's performance, quality, and production efficiency. The design stage generally includes four steps: requirement analysis, structural design, mold flow analysis, and design review. This phase usually takes about 1–4 weeks. If the mold structure is simple and customer requirements are clear, the time will be shorter. For complex structures or unclear requirements that require repeated modifications, the time will be longer.
Mold processing transforms the design drawings into a physical mold. This stage includes material procurement and rough machining, precision machining, polishing, and heat treatment. Precision machining typically involves CNC machining, EDM (Electrical Discharge Machining), drilling, and tapping. This is the core and most time-consuming step of mold processing. The entire process generally takes 2–8 weeks, depending on the mold size, complexity, process requirements, and the manufacturer's production efficiency.
An injection mold consists of multiple components, usually machined separately. After these parts are made, they must be assembled, including installing the mold base, ejection system, and cooling channels. After assembly, functional checks are required to ensure the smooth operation of moving parts like sliders and lifters. Cooling and venting tests are also conducted to verify waterway sealing and exhaust effectiveness. This stage typically takes 1–3 weeks, but the duration may vary.
Mold trial refers to test production. The mold must be tested on an injection molding machine to verify its performance. Usually, at least two trials are required. If issues are found during the trials, further modifications are necessary. This stage generally takes 1–4 weeks.
For a medium-sized injection mold, the total manufacturing cycle is typically around 5–8 weeks under normal circumstances.
