Bobbin-based Dense Multi-layer Winding
Tightly layered winding on high-temperature resistant bobbins, ideal for ABS solenoid valves and transmission directional valves. Requires precise turn count and winding tightness control to prevent inter-turn friction short circuits caused by vibration.
Dual-Winding Parallel/Series Winding
Two independent windings (pull-in winding & hold winding) on the same bobbin, switching to cut holding power consumption, perfect for fuel injection valves or canister solenoid valves. The line needs auto tap and reverse winding functions.
Fully Sealed Overmolded Embedded Winding
Finished coils are placed into molds for injection encapsulation to form an integrated sealed structure, suitable for transmission internal or engine external oily environments. Winding process reserves injection positioning features and lead anti-seepage sections.
High Resistance Consistency for Stable Driving Force
The opening/closing pressure of valve coils directly links to ampere-turns. Automated lines deliver tight batch resistance deviation via precise turn control and constant tension winding, ensuring consistent actuation voltage and response time for every valve.
Reliable Oil & Temperature Resistant Insulation
Automotive valve coils use high-temperature grade enameled wire with zero enamel film damage after forming. Yite lines are equipped with ceramic wire guides, anti-static devices and flexible layering mechanisms to avoid insulation scratches; optional auto tape wrapping or conformal coating upgrades corrosion resistance.
Full Automation with Integrated In-line Testing
From bobbin feeding, winding, wire cutting, terminal crimping/soldering, resistance test, withstand voltage test to laser marking, Yite delivers full-line automation solutions. It drastically reduces contamination and damage from manual handling, with full production data traceability for every coil.
Serving multiple automotive Tier 1 suppliers, Eternal has accumulated rich process expertise in valve coil winding. Our automated lines support round and flat wire winding, with standard in-line resistance testing and inter-turn withstand voltage test interfaces, and optional integrated vision inspection for coil profile.
We provide supporting solutions including auto high-temperature bobbin feeding, lead hot-press soldering, and pre-shaping for coils before injection molding. For high-volume models like ABS solenoid valves and transmission valves, we offer high-efficiency multi-station machine models. After-sales services include timely phone support, fast on-site response, free process sampling and operation training.
