What You Get When You Choose Churub: Professional Services Across LSR Molding and Overmolding

Buying silicone parts is easy; buying silicone engineering is what separates a smooth program from a stalled one. Here is exactly what the Xiangchu team delivers when you bring us a liquid silicone part — molded, overmolded, or somewhere in between.

Design and DFM review before any steel is cut

Send us a drawing or a sample and the first deliverable is a manufacturability review: wall thickness distribution, demold draft, gate location, undercuts, expected flash line and tolerance feasibility. We quote tooling and unit price line by line against that review, and we will tell you when a design choice will cost you money at volume — before the mold is machined, while changes are still free.

LSR injection molding for precision parts

Our 85T/120T/160T vertical injection machines in a class-100,000 cleanroom handle liquid silicone rubber parts with tolerances down to ±0.05 mm, flash-free parting lines and cycle times of 30–90 seconds. Compounds are specified to application: food-contact, medical skin-contact, low-volatility baby-care grades, or high-tear industrial formulations. Post-cure, 100% inspection and full documentation close the loop on every batch.

Liquid silicone overmolding: bonding as a validated process

Overmolding LSR onto metal or plastic inserts is a chemistry project, not a molding afterthought. We ultrasonically degrease and heat-activate every insert, use plasma treatment where primer-free compliance is required, and manage insert heat-sink effects with localized mold heating. Every overmolded part is released only after peel-strength testing plus 100 thermal cycles from -40°C to +150°C — the failure mode that passes on day one and peels in the field is designed out before production, not discovered after it.

Beyond molding: the services around the part

Tooling design and ownership with a 500,000-shot warranty. Material selection across silicone families (LSR, HTV, fluorosilicone) with honest trade-off advice. Validation coordination with third-party labs for FDA, LFGB and ISO 10993 programs. Export packaging, documentation and logistics from a general VAT taxpayer with full import-export rights. And after launch: 10–15 day re-orders, mold maintenance included, and engineering support when your product evolves. That is the full scope of what "choosing Churub" buys you.