How long does it take to open a mold for a new die-cast product? An introduction to the standardized process covering mold design, trial runs, and mass production.

The mold is the foundation of die-cast part formation; the rationality of its structure, machining precision, and heat treatment quality directly determine the product's cosmetic yield, dimensional accuracy, mold lifespan, and overall production costs. Many clients commissioning die-cast parts for the first time are unfamiliar with the specific steps, timelines, and key considerations of mold making, which can lead to project delays and additional costs from repeated mold modifications. Today, we provide a detailed breakdown of the standardized mold development process used by professional die-casting factories, helping clients clearly track the progress of new projects.

Step 1: Drawing Receipt and DFM Review. Upon receiving 2D and 3D drawings, the technical department immediately conducts a structural review. They assess factors such as wall thickness at sharp corners, ease of demolding, and the feasibility of subsequent CNC machining and surface treatments. This proactive approach helps avoid potential issues like deformation, short shots (incomplete filling), or demolding failures. A DFM (Design for Manufacturability) optimization report is issued, and mold design begins once both parties confirm the plan.

Step 2: Mold Structural Design and Machining. Designers plan the parting line, gating system, venting system, and cooling channels, determining whether to use a single-cavity or multi-cavity layout based on order volume. Specialized die-casting mold steel is selected and processed through multiple stages-including rough milling, precision milling, drilling, heat treatment, and polishing-to ensure mold hardness and stability during long-term mass production.

Step 3: Initial Trial Run and Sample Inspection. The mold is mounted on the machine to produce raw castings. Samples undergo item-by-item inspection for appearance, critical dimensions, and internal defects. Die-casting parameters are recorded, issues are identified, and targeted mold structural modifications or parameter adjustments are made.

Step 4: Sample Refinement and Client Confirmation. Trial samples are sent to the client for inspection. Based on their feedback, mold details are fine-tuned and processes optimized. Iterative trials and modifications continue until all sample specifications fully meet the drawing requirements, culminating in final sample approval.

Step 5: Small-Batch Trial Production and Validation. Following sample approval, a small-batch trial run is conducted to validate continuous production yield, cycle times, and dimensional consistency. The complete set of mass-production process parameters is finalized, and potential issues for mass production are resolved.

Step 6: Full-Scale Mass Production and Routine Mold Maintenance. Once mass production begins, we implement a regular maintenance and inspection schedule-promptly removing carbon deposits and repairing areas of wear-to extend mold lifespan and ensure consistent product quality over the long term.

Equipped with a professional mold design team and an in-house machining workshop, we independently handle the entire process-from die-casting mold design and machining to trial runs. We offer flexible capabilities ranging from rapid prototyping molds to large-scale production molds, helping to shorten the time-to-market for new products; please feel free to contact us for a quote on custom mold projects.