About Inox Die Cast
Inox Die Cast is the die casting brand of a Hong Kong-registered company within SunOn Industrial Group, manufacturing in Dongguan, China since 1997. The factory covers roughly 32,000 square meters and employs around 1,000 people across mold making, die casting, CNC machining, surface finishing and assembly-adjacent operations.
This page states plainly who we are, how the company relationships fit together, and what kind of manufacturing partner you get when you work factory-direct.
At a glance
- Hong Kong company within SunOn Industrial Group, casting since 1997
- 32,000 m² Dongguan factory, around 1,000 employees, tool room downstairs
- Aluminum and zinc only — we say plainly what we do not do
- The engineers who review your drawing run your program
The Company, Plainly
The structure: SunOn Industrial Group is the manufacturing group; Inox is its Hong Kong-registered trading and customer-facing company; this site, inoxdiecast.com, is the group's dedicated die casting channel. The same organization also operates inoxcast.com. One group, one factory floor, different doors into it — stated here because suppliers who blur their identities create exactly the sourcing risk our own supplier guide warns about.
The history: the factory started in 1997 and grew the unglamorous way, adding capabilities as customer programs demanded them — mold making first as the foundation, then die casting lines, machining and finishing, until the building could take a drawing at one end and ship finished parts from the other.
The philosophy is factory-direct: no broker between your engineering questions and the people who answer them, tooling that lives where it was built, and documentation with one owner. Buyers who have run programs through intermediary chains will recognize what that removes.
What the Vertical Integration Covers
Under one roof: mold design and mold making, hot-chamber zinc and cold-chamber aluminum die casting, CNC machining, and surface finishing from powder coat to plating to screen printing. The practical consequence is accountability — when casting, machining and finish all answer to the same management, the question 'whose defect is this' has one answer and one fix.
Who We Work With
Hardware startups running their first thousand-piece production batch, equipment OEMs converting weldments to castings, and appliance and telecom buyers running continuous volume — across automotive, electronics, medical equipment, industrial machinery and consumer hardware. The industry pages describe each territory; the common thread is buyers who want the factory itself in the conversation.
Representative application illustration — not a record of a specific customer program.
Frequently Asked Questions
Where exactly is the factory?
No.88 Hongying Industrial Park, Hongshi Bridge, Fenggang Town, Dongguan City, Guangdong Province, China — in the manufacturing corridor between Shenzhen and Guangzhou. Visits are welcome, and live video factory walks are routine for buyers who cannot travel.
How do Inox Die Cast, Inoxcast and SunOn relate?
SunOn Industrial Group is the manufacturing group and factory owner; Inox is the Hong Kong-registered company serving international customers; inoxdiecast.com is the group's die casting-focused channel, and inoxcast.com is an earlier-established site of the same organization. Same factory, same management — different entry points, disclosed plainly.
What certifications do you hold?
Certification scope documentation is provided on request as part of supplier evaluation, so you can read the named entities and scopes on the actual documents rather than trust a logo strip on a website. We treat that as the correct standard for any supplier's certificates, including ours — our supplier selection guide explains why.
Can we start with a small program?
Production starts at 1,000 pieces, deliberately reachable for startups. Small first programs that grow are the factory's favorite story — the tooling review will plan cavity counts and tooling class so your first order does not overpay for volumes you have not reached yet.
Where to Go Next
Meet the factory
Judge Us by the Review, Not the About Page
Company pages are easy; engineering is hard. Send a drawing and grade the specificity of what comes back — that is the real introduction.