Directly integrated into motor production lines and rewind facilities across Itapúa and the Mercosur corridor. Each machine is factory-tested against customer core samples with custom-engineered slot and lacing fixtures.
In the modern manufacturing and refurbishment of asynchronous and permanent magnet motors, stator coil lacing is not merely a cosmetic finishing step. It is the critical mechanical operation that locks coil overhang geometry, stabilizes slot phase boundaries against electrodynamic surge forces, and prevents insulation fretting during cyclic thermal expansions.
The single side lacing mechanism employs an articulated servo-driven needle arm coupled with a synchronized hook loop maker. As the stator indexes around its central vertical fixture, the needle penetrates the stator slot pitch, pulls the polyester cord through the coil overhang, forms a knot or chain stitch, and clinches the bundle with uniform, adjustable tension.
While double-side machines bind both ends simultaneously, single side lacing offers immense mechanical versatility for low-to-mid volume OEM and specialized rewind lines. Operators can lace lead-out ends with complex terminal routing, install thermistors (PTC/PT100) on the connection face under direct visual monitoring, and adapt quickly across divergent stack heights.
Manual lacing often subjects magnet wire enamel to sharp edges and irregular manual pull forces, resulting in turn-to-turn micro-faults. Our automated needle trajectory ensures frictionless passage between coil loops. By maintaining constant pneumatic brake tension, the machine prevents loose cord knots that could untangle under full-load centrifugal vibrations.
Positioned strategically on the banks of the Paraná River across from Argentina, Encarnación and the wider Department of Itapúa represent one of Paraguay's most vigorous agribusiness and transshipment corridors. Electrification and industrial automation in this region demand robust, humid-subtropical-rated electric motors.
Itapúa produces massive volumes of soybeans, corn, and yerba mate. Continuous-flow grain dryers and bucket elevators run 24/7 during harvest season. Single-side laced stators ensure that motor end windings resist severe airborne chaff, dust accumulation, and heavy mechanical vibration without coil separation.
Rice cultivation and livestock operations throughout southern Paraguay depend on deep-well and river-intake pumps. High hydrostatic pressure and moisture stress mandate tight end-turn compaction so varnish penetration is 100% void-free. Our lacing geometry achieves high dimensional uniformity for tight pump housings.
With summer temperatures routinely exceeding 38°C in Encarnación, refrigerated cold storage along the export river port requires dependable industrial condenser fans and ammonia compressor drives. Stators bound on our machines maintain strict concentricity and clearance against rotating end shields.
Comparing manual lacing against automated single-side and double-side manufacturing configurations to guide procurement teams and plant engineers in Encarnación.
| Evaluation Parameter | Manual Hand Lacing | Zunqi Automatic Single Side Lacing | High-Volume Double Side Lacing |
|---|---|---|---|
| Cycle Time (36-Slot Stator) | 8.0 – 15.0 Minutes | 14 – 22 Seconds | 10 – 14 Seconds |
| Tension Uniformity | Variable (±35% operator variance) | Constant Servo/Pneumatic (±3%) | Constant Servo/Pneumatic (±3%) |
| Slot-Pitch Flexibility | Infinite (operator dependent) | Programmable via Touchscreen HMI | Programmable (requires paired tooling) |
| Lead-Wire Dressing Ease | High (full manual access) | High (open top side during cycle) | Moderate (requires precise fixtures) |
| Tooling Changeover Time | None | 8 – 15 Minutes | 25 – 45 Minutes |
| Capital Expenditure Ratio | Baseline (1.0x - Low Initial) | Moderate (3.5x - Fast Payback) | High (7.0x - Scale Dependent) |
| Best Suited Production | Emergency 1-off jobbing shops | OEM Batch & High-Mix Rewind Centers | Dedicated High-Volume Fan/Pump Lines |
Paraguay is undergoing a quiet electrical and manufacturing transformation. Driven by virtually 100% renewable hydroelectric power from Itaipú and the neighboring Yacyretá Dam (situated just downstream from Encarnación at Ayolas), regional production advantages are reshaping local industry.
Under Paraguay's Ley de Maquila, export-oriented manufacturers benefit from low corporate tax thresholds and some of the world's most economical industrial electricity tariffs. Encarnación's emerging industrial zones are attracting appliance assemblers and component sub-contractors serving the Mercosur economic zone.
Workshops across Itapúa previously relied on manual winding forms and hand lacing for motor repairs. However, regional agribusiness demands for IE2 and IE3 high-efficiency motors require tighter slot fills, precise coil overhangs, and reliable vibration resistance, accelerating adoption of semi-automatic CNC machinery.
Factory directors and purchasing managers in Encarnación are bypassing expensive multi-tier European distributors, sourcing factory-direct manufacturing automation from Dongguan with standardized, globally available PLC architectures (Siemens, Delta, Mitsubishi) to ensure local parts availability.
Headquartered in Qishi Town, Dongguan, China—at the heart of the world's most concentrated precision tooling and electronics manufacturing cluster—Zunqi Intelligent Equipment Co., Ltd. has specialized in electric motor stator and rotor automation for more than 17 years. Our machinery operates globally across appliance, industrial pump, automotive blower, and servo motor factories.
We do not supply off-the-shelf compromises. Every single-side lacing fixture, needle stroke guide, and expanding mandril is CNC machined specifically to your stator drawing, stack height range, and slot lamination profiles.
We invite clients to send actual stator samples to our Dongguan facility. Prior to crating, our engineers film a complete trial run with your wire gauges, recording cycle times, knot integrity, and lacing clearance for your formal sign-off.
From slot insulation inserting and coil winding to single/double-side lacing, intermediate and final hydraulic forming, rotor turning, and hydraulic shaft pressing, we engineer fully matched production ecosystems.
Common engineering and commercial questions asked by motor manufacturers, rewinding centers, and industrial buyers throughout Paraguay and the Mercosur zone.
Send your stator core blueprints, lamination OD/ID, stack height range, and production targets. Our application engineering team will provide a comprehensive machine specification and full line layout within 9 hours.