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Sanpin provides precision thermoplastic injection molding for components that demand tight dimensional control and consistent surface quality. With molding tolerances of ±0.02 mm and press capacity ranging from 50T to 1,300T, our Shenzhen facility operates around the clock to meet demanding production schedules. Combined with our in-house mold design and manufacturing capabilities, we control the full production chain — enabling faster mold-to-part transitions, shorter lead times, and reliable batch-to-batch consistency for the automotive, medical, home appliance, and consumer electronics industries.
Sanpin's injection molding services focus on engineering thermoplastics, including ABS, PC, PA, POM, PP, PBT, and high-performance resins such as PPS and PEEK.
45,000,000 +
Monthly Parts Capacity
50 +
Monthly Molds Fabrication
± 0.0254 mm
Precision Mold Tolerance
± 0.05 mm T
Precision Molding Tolerance
Every industry has its own quality standards, material challenges, and production demands. Sanpin's 18 years of tooling experience across multiple sectors means your project team works with engineers who already understand your industry's requirements — reducing design iterations and speeding up time to production.
IATF 16949 certified. We build molds for door panels, center consoles, bumper grilles, lighting housings, and powertrain components.Our core strength is 2K/3K multi-shot molds for automotive lighting and interior trim — a capability that sets us apart from most singlematerial mold makers. Annual output: 500 to 600 mold sets.
AC panels, washer control panels, refrigerator assemblies, and small appliance housings. We handle large-format molds up to 2,500 mm with consistent surface texturing and dimensional control across high-volume production cycles.
ISO 13485 certified with dedicated cleanroom injection molding capability established in 2019. We produce molds for diagnostic housings, device structural parts, and disposable medical components under strict contamination control and full material traceability.
Charger housings, wearable device parts, precision connectors, and optical-grade components. Mold tolerances down to ±0.02 mm with mirror-polished or high-gloss textured finishes for products where appearance is critical.
There are over 200 common injection molding materials. It includes general-purpose plastics, engineering plastics, and high-performance materials.
Modified materials are optimized from base materials by adding fibers, flame retardants, or adjusting molecular structures. Globally, there are over 18,000 commercial modified materials to meet performance requirements in different scenarios.
Tips: For product designers: Read our plastic material selection in medical industry.
Injection molding, 3D printing, and CNC machining are common processes for producing plastic products, and there are certain principles for selecting the right service provider for each process.
When the order exceeds 500 pieces, the per-unit cost of injection molding may be only 1/10 of 3D printing, and the delivery speed improves with larger batch sizes.
High-temperature resistance (>120°C) or elastomeric properties (such as silicone seals)
The appearance textures (leather grain/matte) and color matching at the mass production stage can only achieve 99% consistency through injection molding molds.
