Ultra-Fine Wire Drawing Machines for Electronics in China

Addressing a Persistent Industry Challenge

Wire and cable manufacturers producing ultra-fine and fine wire for electronic components face a recurring set of operational obstacles: mechanical tension fluctuation that leads to wire breakage and diameter variation, equipment procurement costs that are significantly higher when sourced from international suppliers, heavy dependence on operator skill for consistent output, and limited flexibility when processing precious-metal and specialty-alloy fine wire. These pain points directly affect yield, production cost, and the ability to meet tight dimensional tolerances required in sectors such as semiconductor packaging, bonding wire, and precision electronic components.

Changzhou Dingtian Electrical Machinery Co., Ltd., operating under the brand Dingtian, is a manufacturer of wire drawing machines specifically for the electronic wire and wire cable industry. Headquartered at No. 10, Dangnan Industrial Park, Tianning District, Changzhou City, Jiangsu Province, China, the company supplies precision ultra-fine and fine wire drawing equipment in servo, slip-type, tension-rod-free, and in-line continuous annealing configurations, serving both domestic and export markets.

A Technology Platform Built Around Tension Control

At the core of Dingtian’s equipment lineup is a technology platform designed to resolve the tension instability that causes wire breakage and diameter inconsistency. This platform includes full-servo systems with customized Inovance servo components for tension control, dual inverter plus PLC control for synchronized wire drawing and take-up, tension-rod-free slip control paired with closed-loop constant tension control, and in-line continuous annealing using DC three-stage annealing with saturated steam isolation.

Full-Servo Machines for Ultra-Micro and Micro-Fine Wire

For applications demanding the tightest tolerances, Dingtian’s full-servo product line targets precious metal processing, bonding wire, medical, aerospace, electronic component, and semiconductor packaging applications. The QSF45-10 Full Servo Ultra-Micro Fine Wire Drawing Machine supports finished wire diameters down to 0.0085 mm—approximately 1/7 the diameter of a human hair—with a wire diameter tolerance held within ±0.0005 mm. Its customized Inovance servo system delivers fully linear automatic control of take-up slip, and its tension-rod-free slip drawing technology removes mechanical tension rod fluctuation to reduce breakage. Notably, this model is priced at around one-tenth of international brands for selected ultra-micro configurations, a differentiator that matters for manufacturers evaluating capital expenditure against equipment capability.

The QSF60-12 Fully Servo Micro-Fine Wire Drawing Machine replaces conventional belt drive structures with four Inovance servo motors, addressing instability from belt slippage while supporting finished wire diameters down to 0.014 mm. The QSF85-15 Full-Servo Micro-Fine Drawing Machine extends this approach with multi-pass synchronous control, enabling zero tension drift during long-hour continuous operation while supporting materials ranging from oxygen-free copper wire to precious metal fine wire.

Slip-Type and Tension-Rod-Free Machines for Scalable Production

For processors and small to mid-sized factories seeking a balance between cost and precision, Dingtian’s dual-inverter slip-type series—including the SPS60-12, SPS85-15, SPS100-24, and LSH120-24—applies tension-rod-free design to reduce wire breakage by more than 90% compared with conventional machines. The SPS85-15 achieves wire diameter accuracy stably controlled within ±0.001 mm, while the SPS100-24 supports 24-die multi-pass progressive drawing with a maximum line speed of 1,800 m/min and non-contact wire breakage detection for millisecond-level automatic stop.

Moving toward higher-volume, mainstream cable production, the LHS series—LHS150-24, LHS220-24, and LHS240-24—applies tension-rod-free design at larger scale. The LHS240-24 reaches a maximum line speed of up to 2,500 m/min, and for 0.2 mm finished copper wire this translates to daily output of approximately 2,880 km at 2,000 m/min and approximately 3,600 km at 2,500 m/min, a 25% capacity increase under the same process and wire specification. The LHS150-24 carries a reserved interface for continuous annealing, allowing manufacturers to plan future upgrades to soft wire production lines without replacing core equipment.

Integrated Drawing and Annealing for Soft Copper Wire

For manufacturers requiring soft copper wire without a separate annealing step, the LHST150-24 and LHST240-24 integrate drawing and in-line continuous annealing in a single system. The LHST150-24 is dedicated to ultra-fine soft copper wires of 0.05 mm to 0.12 mm, synchronizing main slip control with annealing power supply so voltage and current adjust adaptively in real time with line speed. Its enclosed annealing channel with saturated steam isolates air, producing a bright surface free of oxidation and blackening and eliminating subsequent pickling. Whole-machine linkage optimization on this line achieves 12% to 20% lower overall power consumption compared with separated equipment. The LHST240-24 extends this integration to finished wires of 0.08 mm to 0.35 mm and can have its annealing unit disabled to operate as an ordinary tension-rod-free fine wire drawing machine for hard copper wire, improving equipment utilization.

Automatic Spool Change for Unmanned Mass Production

The LHSZ240-24 Servo Tension-Rod Fine Wire Drawing Machine with Automatic Spool Change addresses downtime associated with frequent spool changes. Its non-stop dual-spool automatic change switches from a full spool to an empty spool without wire breakage. While conventional machines typically require spool changes every 2 to 4 hours, this model can run continuously for more than 8 hours, and the number of machines a single operator can manage increases by over 50%. Optional online diameter measurement and an optional waste liquid filtration system further support intelligent and cleaner production line construction.

Demonstrated Reliability and Market Recognition

Dingtian’s engineering output is documented through granted utility model patents, including CN220787693U for a reel driving mechanism and wire drawing machine (application filed October 12, 2023; granted April 16, 2024) and CN221086758U for a cooling mechanism for a dual variable frequency micro-fine wire drawing machine (application filed November 14, 2023; granted June 7, 2024). The company holds quality management system certification (GB/T 19001-2016 idt ISO 9001:2015), environmental management system certification (GB/T 24001-2016 idt ISO 14001:2015), and occupational health and safety management system certification (GB/T 45001-2020 idt ISO 45001:2018), and was recognized as a Provincial Specialized and Innovative Small and Medium-Sized Enterprise by the Jiangsu Provincial Department of Industry and Information Technology, effective April 2024 to April 2027.

Customer feedback reinforces these technical claims. One long-term customer reported that a Dingtian machine required no major overhaul after 8 years of operation. Another customer, focused on export-oriented micro wire drawing, reported a finished wire dimensional tolerance of ±0.0006 mm and surface roughness of Ra ≤ 0.015 μm, passing inspection on the first attempt, with an export product qualification rate reaching 99.8% and an overseas order volume increase of 60%. Additional customers have highlighted the professionalism of Dingtian’s team during in-depth customization projects and appreciated services such as equipment appearance customization—including removal of the Dingtian logo and provision of blank panels—paired with on-site wire trial verification.

A Practical Path Forward

For manufacturers in China’s electronic components and wire cable industry evaluating ultra-fine wire drawing equipment, the combination of tension-rod-free and full-servo control architectures, adaptive retrofitting to existing annealing and take-up systems, and documented customer outcomes positions Changzhou Dingtian Electrical Machinery Co., Ltd. as a manufacturer capable of addressing the tension stability, cost, and precision challenges that have long constrained fine wire production.

https://www.dtwiredraw.com/
Changzhou Dingtian Electrical Machinery Co., Ltd.