Zonzao Die Development

宁波众造模具科技有限公司 identifies its speciality as aluminium high-pressure die design and manufacture. Its introduction gives April 2016, consistent with the registered 13 April 2016 incorporation date. It lists industrial machinery among served sectors; the detailed cases reviewed here are labelled automotive components. [1] [4] No engineering-machine OEM or replacement-part approval is implied.

The homepage says it has 280–5000T casting machines; the company introduction says produced tools match 280–4500T machines. These are different statements, not one verified machine inventory. Ask what equipment is actually available for your trial and which receiving machine the offered tool will match.

The development page discusses parting, slides, replaceable pins, gating, venting and heating/cooling circuits. [2] Its quality page starts with part structure, wall thickness, dimensional review and a jointly optimised DFM report. [3] Ask for those decisions on your drawing, not a generic list of available techniques.

Agree who releases a drawing change and how it affects cost, trial dates and the accepted revision. The website’s general precision and process claims do not establish a tolerance for every supplied casting.

Zonzao states that trial material should match the product material and trial-machine tonnage should match the customer’s machine. It also describes detailed trial process records and a full die history supplied at transfer. [3] These are useful contractual starting points, not evidence that your future order has passed.

1. Agree the trial: specify material, receiving-machine requirements, fixture/tool configuration and samples.
2. Link records: tie the tool identifier, revision, run settings and sample inspection to the same trial.
3. Close changes: record modifications and repeat checks before accepting the final tool.
4. Transfer the package: list drawings, material records, trial results, spare/wear details, handling and maintenance instructions.
5. Verify at destination: define who supports installation and the receiving factory’s repeat-run acceptance.

Machine tonnage alone does not resolve every interface. Have the receiving foundry review the package before shipment. State ownership, storage, maintenance and any limits on copying or transferring the tool. A later process change needs its own review.

A Ningbo Polytechnic college report dated 5 March 2025 describes a staff visit on 27 February, including a factory walk and discussion of die development. [6] That independently supports a reported visit to the named company. It is not a technical audit, a current certificate check or a validation of individual castings.

The website’s cumulative 2000-tool figure, staffing and equipment counts lack effective dates; the manufacturing page itself gives different CNC counts. Request the resources allocated to your order. The special-equipment homepage case uses “400Kg” without a complete pressure unit or reviewed report, so it is not converted into a rated pressure or certification here.

Official contacts give Moganshan Road36, Beilun; the registered address is Xinda Road1069, building40. [5] Confirm the current workshop, delivery/inspection location and invoice entity rather than replacing the original record.