Injection Mould Tooling in China
Topworks builds plastic injection molds in Huangyan, China’s mold city. Single-cavity prototype tools, multi-cavity production molds and hot-runner systems, cut from steel you can verify.
Request Your Free Mold Quote
Send a 3D file or describe your part. You get DFM feedback and a tooling price within 24 hours.China injection molds, built to your drawing
Most buyers come to us with a STEP file and one question: can a China plastic injection mold hold the same tolerance and tool life as one built at home? It can, if the steel is real, the DFM is done before cutting, and someone checks the T1 parts against your drawing instead of against the mold.
That is the whole job of mould tooling here. We design the tool, cut and fit it in our Huangyan shop, sample it on our own presses, and ship the mold or run production for you. Every China injection mold we build comes with a steel spec, a T1 dimensional report and weekly progress photos.
Need parts rather than a tool? See our injection molding service. Testing a design first? Start with low volume and prototype molds.

An injection mold manufacturer in China since 2006
For 20+ years we have built tools for automotive, medical, consumer and electronics OEMs. The goal is simple: a mold that runs, priced like a China mold, without the usual sourcing headaches.
Injection Mold Structure – Cross-Section
Two-plate mold, closed position, 2 cavities. Hover or tap any part or number.
Premium Tool Steel
P20, H13, S136, NAK80, 718H on HASCO, DME or LKM mold bases. We never swap in a lower grade.
7-Day Sampling
Once the tool is finished, T1 samples are molded, measured and on their way to you within 7 days.
Free DFM Analysis
Send your 3D file. Our engineers flag wall thickness, draft, undercut and gate issues before any steel is cut. How our DFM works.
One-Stop Service
Tooling, molding, assembly, packaging and DDP shipping. One contract, one team, one accountable partner.
Lifetime Mould Warranty
If a Topworks mold fails before its rated cycle count because of a manufacturing defect, we repair or replace it free.
English-Speaking PM
A dedicated project manager who reads CAD and writes fluent English. No language gaps, no lost days.
Mold steel and tooling standards
Volume, resin and finish decide the steel. Pick wrong and you pay later in rework or a dead tool.
Mould Steel
Tooling Standards
Not sure which grade fits your volume? Read our P20 vs 718H vs H13 vs S136 comparison, or see how two-plate, three-plate and hot runner molds differ. Aluminium tools for short runs are covered on our low volume page.
Mould types, materials, and industries we serve
Mould Types
Industries Served
Materials Processed
Production Capacity
How injection mold making works at Topworks
Six steps, one transparent timeline. You always know where the tool is, when samples ship and what comes next.
RFQ
Day 0Send a 3D file or sketch with target quantity, resin and timeline.
Free DFM
Day 1-2Engineers review mouldability and flag cost or quality risks.
Quotation
Day 2-3Tooling cost, part price, steel spec and timeline in one quote.
Mould Making
4-8 WeeksSteel cutting, EDM, polishing and fitting. Weekly progress photos.
Sampling (T1/T2/T3)
Within 7 DaysT1 samples ship with a dimensional report for your approval.
Mass Production
OngoingPre-production sign-off, then molding with in-line QC checks.
Already have a tool at another shop? We take over existing molds too. See how mold transfer works.
Common questions from mold buyers
Most Topworks molds fall between $1,500 and $80,000. A simple single-cavity tool for a small part starts around $1,500. A medium multi-cavity automotive tool usually runs $15,000–$30,000. Large bumper or appliance molds with hot runners can reach $50,000–$80,000. For a full breakdown of what drives the price, read our injection mold cost guide.
Standard lead time is 35–55 days from DFM approval. Simple prototype molds take 25–35 days. Production molds take 40–55 days. Multi-cavity hot runner molds take 55–75 days. Express builds run about 50% faster with a surcharge.
For molds: 1 piece. We build single-cavity prototype molds for runs as low as 100 parts. For molded parts only, using your existing mold, MOQ is usually 500–1,000 pieces.
Yes. We sign NDAs before opening any 3D file. Your designs sit on encrypted servers and only the assigned engineers can open them.
Tool life depends on steel and resin, so we spec it against your yearly volume at quote stage. If a mold fails because of our workmanship, we repair or replace it at no cost. Good maintenance adds years; here is our mold maintenance guide.
Yes. We inspect the incoming tool, repair or refit it where needed, and run a trial before production. Read the mold transfer checklist before you ship it.
Yes. We ship worldwide and handle US, EU, UK, Canada, Australia, Japan and Brazil customs. FOB, CIF and DDP terms are all available, including door-to-door with duties prepaid.
Standard terms: 50% deposit, 50% before shipment after T1 approval. We accept T/T, L/C for orders over $50K, and PayPal for orders under $5K.
Price is the obvious gap. Steel, standards and inspection decide whether quality matches. We break it down in China vs US vs Japan mold manufacturing.
Read before you order a mold
P20 vs 718H vs H13 vs S136
Which mold steel fits your volume, resin and finish.
DesignWhen You Need Moldflow
When flow simulation pays off and when it is wasted money.
Sourcing10 Precision Mold Makers in China
How to shortlist and compare China tooling suppliers.
FinishSPI and VDI Surface Finish
What each finish grade means for cost and draft.
Ready to start your injection mold project?
Send your 3D file or part description. You’ll get DFM feedback and a detailed tooling quote within 24 hours, free and with no obligation.
Get Your Free Mold Quote