Progressive Die Stamping

A progressive die performs a sequence of operations — piercing, blanking, bending, forming — at successive stations inside one tool, while a coil or strip of sheet feeds through it, one press stroke advancing the strip by one pitch. The part emerges completed (or nearly) at the final station, at press speed. It is the natural production method for smaller aluminum and stainless parts needed in sustained quantities: brackets, clips, contacts, covers and plates.

Progressive tooling concentrates cost and quality into the die itself. A well-built progressive die runs fast and consistently; a poor one produces a permanent argument. That is why this page is anchored on the die shop rather than the press: Runpeng's mould division has designed and produced moulds and dies in-house since 1996, and progressive programmes are quoted as tooling-plus-production packages by that team.

Single-operation dies — one press, one action, manual or simple transfer between operations — suit lower volumes and larger, simpler parts. Progressive dies repay their higher tooling cost when volume is sustained and the part is small enough to live on a strip. The review's job is to locate your part on that curve honestly: expected lifetime volume, part size, feature count and material all feed the recommendation, and the quote shows tooling and unit price separately so the crossover is visible.

Because the same factory also offers CNC machining and die casting, a part that does not belong on a progressive die at all still has a home here — the review routes it rather than forcing it.

Send the drawing with honest volume expectations — trial quantity, first-year quantity, lifetime guess. The die team reviews strip layout feasibility (how the part nests, what the carrier strip needs, which features form at which station), then quotes tooling and unit price with the assumptions written down. Sampling follows die build, and approval of the sampled strip parts releases production on the same tool — the tool that will run the programme's life, maintained by its builders.

Stamping programmes stay healthy on two habits. First, respect the die as the programme's centre of gravity: it is designed and built by the in-house mould division, held for the programme's life, and maintained by its builders — so tell the review honestly about expected lifetime volumes, because die decisions made for year one quantities can be wrong for year five. Second, freeze feature placement early: holes, forms and patterns are steel once the die is cut, and the cheapest design change in stamping is always the one made before that.

Buyers transferring an existing part should say so at enquiry. A part with an existing die, a part needing a new die, and a part being re-specified from a sample are three different projects with three different first steps, and the review will name which one you have before quoting anything.