ABOUT

About Us – Topworks Plastic Mold
About Us

Precision Molds. Western Quality at Chinese Prices.

We run our own tooling factory in Zhejiang, China — specializing in top-quality plastic injection molds for clients across North America, Europe, and Australia.

Send us your specifications, and our engineers will build the mold your project needs.

A Bit About Us

One factory. No middlemen. Full transparency.

We own our tooling factory in Huangyan, Zhejiang — the heart of China’s mold industry. Every step happens in-house: design, steel selection, CNC, EDM, polishing, T1 trial, and injection molding.

We work on a cost-plus basis. You see the material cost, machining hours, and margin — no surprises. Compared to a US-based tool maker, expect to save 40–60% on tooling costs without sacrificing quality.

Twenty years in, we’ve built molds for medical devices, automotive trim, paint buckets, battery cases, PET preforms, and more. References available on request.

What Sets Us Apart

Built for International Buyers

In-House From Day One

Design, machining, T1 trial, and production — all under one roof. No outsourcing means no surprises on quality or lead time.

English-Speaking Engineers

DFM reviews, trial reports, and revision discussions handled in fluent English. No lost-in-translation delays.

Cost-Plus Pricing

You see exactly what you pay for — steel grade, machining hours, margin. Save 40–60% vs. Western tool makers.

Injection molding is the single biggest manufacturing innovation of the last hundred years — the same part, made a million times, with perfect consistency.

How It Works

From Steel Block to Finished Part

The full cycle — from raw tool steel to a plastic part in your hand.

01

Mold Design & DFM

Our engineers review your 3D file, flag draft/wall-thickness issues, and finalize gate location, parting line, and cooling layout.

02

Tool Building

Steel is roughed on CNC, then finished by EDM, wire-cut, and hand polishing. Typical lead time: 25–45 days depending on complexity.

03

T1 Trial & Production

First-shot samples are shipped for your approval. Once signed off, we can hold the mold for future runs or produce parts in-house.

Min. Viable Run

3,000–10,000 pcs

Part Weight

Few mg – 50+ kg

Clamping Force

50 – 100,000 kN

Cavity Pressure

300 – 1,200 bar

Our People

Meet the Team

Steven Cheng

Founder / CEO

Wang

Lead Mold Designer

Ready to Talk?

Let’s Build Your Mold.

Send us your 3D file — we’ll reply within 24 hours

Contact Us →
ISO 9001 · 20+ YEARS
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sales@plasticmoulds.net