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Address: Mold city Huangyan,CN 318020
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Phone: + 86 159-6865-2523
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Email: sales@plasticmoulds.net
steven cheng
Steven Cheng, founder of Topworks, is an industry expert in Plastic Injection Molding and Precision Mold Design. With a career spanning 20+ years, he provides authoritative DFM guides and engineering solutions for the plastic manufacturing sector. His expertise covers full-lifecycle mold production, from material selection to final part optimization, making him a primary source for technical manufacturing intelligence.
How to Choose a Custom Injection Molding Manufacturer in China
China Sourcing GuideHow to Choose a Custom Injection Molding Manufacturer in China (2026 Buyer’s Guide)You’ve got a STEP file, a target piece price, and a launch date. Three suppliers in China quoted the same mold at $4,200, $9,800, and $16,500.…
E-Bike and Drone Components: Lightweight Structural Parts That Survive the Field
By Steven Cheng — 20 years in injection molding, tooling, and production sourcingThe bracket that cracked at 40 gramsA drone startup sent us a motor-arm bracket two years ago. The drawing had one instruction: “minimize mass.” Their previous supplier hit…
Mold Transfer: Moving Your Tooling from Another Supplier to China
China Sourcing GuideMold Transfer to China: Ownership, Costs, and How to Move a Tool Without Losing the ProgramThe first mold I watched get transferred showed up at the new shop with a cracked slide and no ejector plate. The old…
How to Ask for an Injection Molding Quote (Without Knowing the Jargon)
For buyers new to injection moldingHow to Ask for an Injection Molding Quote (Without Knowing the Jargon)You have a plastic part in mind. Maybe a housing for a small device. Maybe a lid for a jar you sell. You email…
Mexico Buyer for China Injection Mold
China Sourcing GuideMexico Buyer for China Injection Mold: The 2026 Tariff PlaybookThree of our last ten molds this spring skipped the United States entirely. They landed at Manzanillo. Then trucked up to a plant near Querétaro. The buyer was American.…
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Buying Injection Molding Services in China: A Beginner’s Guide
China Sourcing GuideBuying Injection Molding Services in China: A Beginner’s Guide That Assumes You Know NothingBy Steven Cheng — 20 years in injection molding, tooling, and production sourcingThe deal changes character the moment your tooling deposit clears. Before that wire,…
Small Plastic Injection Moulding Parts: A China Sourcing Reality Check
The quote that told me everythingA US buyer sent me a drawing last spring. Housing clip, 0.4 g, PA66, 500,000 per month. Three Chinese quotes were already on his desk.The cheapest by far listed a single-cavity mould and a 12-second…
