plastic mold company,injection molding manufacturer in China

China Plastic Mold Maker & Injection Molding Manufacturer

We build injection molds and mold plastic parts in China for buyers in North America, Europe, and Australia. Toolroom, molding floor, and assembly under one roof. You send a 3D file. We return a DFM report, a firm quote, a production schedule, and then parts that match the drawing.

Most of our work is export. That means we are used to the questions overseas buyers actually ask. Who owns the mold? What steel are you cutting? What does the T1 report look like? What happens when a dimension drifts in month six?

What We Do

Injection Mold Building

Mold design, steel selection, CNC machining, EDM, wire cutting, fitting, polishing, and texture — done in-house. Single-cavity prototype tools through multi-cavity production molds with hot runners, sliders, and lifters. We cut P20, 718, H13, S136, and NAK80 depending on the resin, the volume, and the surface finish you need.

Every mold gets a trial before it ships or runs production. T1 is documented: melt temperature, mold temperature, injection pressure, holding time, cycle time, part weight, and photos of every defect found. Then we correct the steel and run T2. Most tools are approved at T2 or T3.

Injection Molding Production

Presses from 80T to 800T. Commodity resins through engineering plastics: PP, PE, ABS, PC, PA, POM, PMMA, and glass-filled grades. Insert molding and overmolding for handles, connectors, and assemblies that need two materials in one part.

Production runs with in-process checks, not just a final inspection. Operators measure critical dimensions during the run. First-article inspection against your drawing before full production starts. If you need PPAP-style documentation or a specific AQL, tell us at quoting — it changes the inspection plan and the price.

DFM Before Steel Is Cut

Send STEP or IGES. Within 24 to 48 hours you get a manufacturability review. It covers wall thickness risks and draft problems. Thick-to-thin transitions that will sink. Ribs that will trap gas. Undercuts needing sliders or lifters. Gate positions affecting warpage and weld lines.

This is the cheapest engineering you will ever buy. Fixing a rib on paper costs nothing. Welding and re-machining a rib after T1 costs thousands and two weeks.

How a Project Runs

1. RFQ and DFM. You send the 3D file, material, estimated annual volume, and surface finish. We return the DFM report and a quote that breaks out mold cost, part price by volume tier, and lead time.

2. Mold design approval. We send the 3D mold design — parting line, gate locations, cooling layout, ejection plan. You approve before we order steel.

3. Build with updates. Weekly photos: steel arrival, rough machining, EDM, fitting, polishing. You see progress, not promises.

4. T1, correction, T2. Trial with full process data and defect photos. Steel corrections. Second trial. Approval on samples that match your drawing.

5. Production and shipment. Scheduled runs, in-process inspection, final QC report with each shipment. FOB, CIF, or DDP — your call.

Mold Ownership, Stated Plainly

You paid for the tool. You own the tool. That goes in the contract in one sentence before production starts. The mold is your property, stored at our facility, maintained by us, and releasable to you on request. We keep the maintenance log. You keep the design files — we send you a copy of the mold design with the final approval package.

Sign an NDA before sending drawings and we will sign it. Your files stay with the project team. We do not show your part to other customers.

What to Ask Any Mold Maker (Including Us)

Five questions separate real shops from trading desks:

Show me a T1 report from a past job. It should have process data, defect photos, and a correction plan — not ten parts in a bag.
What steel grade, in writing? P20 minimum for production volumes. If the quote says “good quality steel” without a grade, it is not a quote.
Send a week-by-week schedule. Steel arrival, rough CNC, EDM, fitting, polish, T1 date. A shop with a loaded machine schedule sends this in a day.
Where is the cooling near the thick sections? Ask on your drawing. “Standard cooling is fine” before checking wall thickness is a guess.
Who pays when parts fail inspection? Settle sorting and rework terms before the first shipment, not after.

Ask us these. We answer them every week.

Typical Lead Times

A simple single-cavity mold: 25 to 35 days to T1. A complex mold with hot runner, texture, and side actions: 40 to 55 days to T1. Production part lead time depends on volume and resin — most repeat orders ship in 2 to 4 weeks after approval. If your timeline is tighter, say so at RFQ. We will tell you honestly whether it fits or what has to give.

Start With a File, Not a Commitment

Send a 3D model and tell us the material, annual volume, and where the part will be used. You will get a DFM review and a real quote. Mold cost separated from part price. Steel grade named. Lead time in weeks. No obligation. The DFM alone usually pays for the email.

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