Injection Molding Machines and Plastics Sourcing in China
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Plastics sourcing from China spans the molding equipment itself — 80T to 650T injection molding machines in hydraulic, servo-hydraulic, and all-electric configurations — as well as the molded parts they produce. Clamp tonnage drives machine selection: a rule of thumb is 2-5 tons of clamping force per square inch of projected part area, so undersizing the machine causes flash and short shots. Servo-hydraulic and all-electric machines cut energy use significantly over older hydraulic units.
When buying injection molding machines you are matching tonnage, shot weight, and tie-bar spacing to your mold, not just chasing a low price. The pitfall is a machine too small for the mold, which produces defects no process tweak can fix.
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FAQ
How do I pick the right injection molding machine tonnage?
Estimate projected part area and multiply by 2-5 tons per square inch depending on material and wall thickness. Pick a machine with headroom above that figure to avoid flash.
Is an all-electric machine worth the higher price?
All-electric machines use less energy, run cleaner (no hydraulic oil), and offer better repeatability for precision parts. For high-volume or medical/electronics parts the lower running cost often pays back the premium.
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