The main-frame serves as the foundation for long-term high-speed operation of the machine. High-speed injection and frequent mold-opening-closing movements continuously generate tremendous impact force and reciprocating vibration. Insufficient rigidity of the frame will easily cause body shake and parallelism deviation of platens during operation, which directly results in wall-thickness deviation and flash defects on finished products. Long-term vibration also accelerates component aging and shortens service life. Lisong high-speed machines adopt a widened, thickened and integrated high-rigidity main-frame. Its main beams are welded with thick steel plates and treated by stress-relief annealing to eliminate internal welding stress, preventing frame deformation and datum offset under 24-hour non-stop production. Optimized via hydrodynamic and dynamic simulation, the frame features a lowered center of gravity to fully absorb impact forces generated by high-speed mold movement and injection, thus greatly reducing overall vibration. Ample maintenance space and modular front-access disassembly structure are reserved, enabling maintenance of hydraulic valves and motor assemblies without extensive dismounting. This significantly cuts maintenance difficulty and downtime, balancing high-strength durability and convenient service performance.

      As the primary guarantee for molding quality, the Lisong high-speed injection molding machine abandons the disadvantage of uneven stress distribution of conventional toggle-link structures under high-speed conditions, and is equipped with a high-rigidity direct-hydraulic clamping unit — one of its landmark structural highlights. Unlike toggle clamping that multiplies clamping force through connecting rods, direct-hydraulic clamping delivers clamping force directly from clamping cylinders. The force is distributed evenly and perpendicularly over the entire parting surface of the mold without uneven pressure at four corners, making it perfectly suited for multi-cavity thin-wall molds. Extra-thick    high-strength cast-steel platens, thicker than those of standard machines with the same clamping tonnage, deliver strong resistance to elastic deformation. Even under prolonged high-pressure and high-speed injection, platen deformation is kept to a minimum and superior parallelism between movable and fixed platens is maintained, fundamentally reducing flash and uneven wall-thickness. Four high-strength alloy tie-bars, finished by precision grinding and heat treatment, provide high tensile strength and stable clamping force with negligible clamping-force decay during long-run continuous production. High-speed servo proportional valves are standard-fitted on the mold-opening-closing circuit to achieve millisecond-level response. Acceleration and deceleration are smoothly controlled during mold travel. High-precision mold-protection function is activated to slow-down and halt the machine immediately once foreign objects are detected inside the mold cavity, effectively protecting costly multi-cavity thin-wall molds and lowering mold-wear costs. A dual-cylinder synchronized ejection system ensures balanced demolding force and steady product ejection under high-speed cycles, avoiding whitening, deformation and sticking-to-mold issues, which is ideal for ultra-thin, easily-deformable thin-wall parts.

      The high-speed injection unit is the core structure that enables rapid cavity filling for thin-wall molding. The biggest challenge in thin-wall production is the rapid cooling of molten plastic, which requires cavity filling to be completed within an extremely short time; otherwise, defects such as short shots, flow marks and weld-lines will occur. The high-speed injection carriage of Lisong machines features an integrally-cast high-rigidity support frame. High-precision linear guides and symmetrically-arranged dual injection-shift cylinders guarantee excellent alignment and smooth travel of the injection carriage with no shaking or offset during high-speed injection. The injection cylinder is optimized with lightweight, low-inertia construction to reduce moving mass and improve acceleration response, allowing it to reach maximum injection speed within 0.05 seconds. The screw is directly driven by a servo motor instead of a traditional hydraulic motor, enabling closed-loop control of screw speed and greatly improving plasticizing metering accuracy. The melt weight of every shot is highly consistent with minimal error, laying a solid foundation for high-quality thin-wall products.

      In terms of hydraulic circuit design, Lisong high-speed machines adopt a composite hydraulic system with multi-servo independent oil circuits and cartridge valves, which forms the hardware basis for compound synchronous actions. Conventional injection molding machines are mostly supplied by a single pump, so mold-opening-closing, plasticizing and ejection can only be performed sequentially, wasting much waiting time and making cycle-time reduction difficult. Equipped with multiple independent servo-driven oil circuits, Lisong high-speed machines support parallel-action modes such as plasticizing during mold movement and ejection synchronized with mold opening. Multiple processes run simultaneously to eliminate idle waiting time, shortening molding cycles by 30%-50% compared with traditional equipment.

      The temperature-control system also provides reliable support for stable high-speed plasticization. The barrel of Lisong high-speed machines is equipped with infrared nano-heating bands as standard. Different from conventional resistance heaters, infrared radiation heating delivers fast temperature rise, strong inward heat penetration and excellent outer-layer thermal insulation to minimize heat loss, achieving over 30 % energy-saving for heating. Multi-channel independent closed-loop PID temperature-control modules are deployed to regulate each barrel section separately. Temperature fluctuation is kept within a very narrow range to ensure uniform melt temperature and prevent local overheating and polymer degradation during high-speed plasticization. This expands material compatibility, especially for temperature-sensitive biodegradable materials such as PLA.

      As the “brain” of the whole machine, Lisong high-speed injection molding machines are fitted with a high-response digital closed-loop control system and a high-speed microprocessor. The system scan cycle for motion control is less than 1 ms. Full closed-loop feedback control is implemented for injection speed, injection pressure, clamping position and holding-pressure parameters. Combined with high-precision magnetostrictive displacement transducers, the repeat-positioning accuracy of platens and injection carriage reaches the micron level. An ergonomically-designed HMI ensures simple operation, while production-data storage and export functions facilitate digital plant management and support factory intelligent upgrading.

      From the high-rigidity main-frame as a solid foundation, direct-hydraulic clamping for guaranteed precision, high-speed injection to overcome filling difficulties, multi-servo hydraulic circuits for cycle-time reduction, and optimized plasticization performance delivered by specialized screws, to precise temperature regulation and intelligent control coordination — every structural design of the Lisong high-speed injection molding machine is tailored to the actual working conditions of high-volume, high-speed thin-wall production. All components work synergistically to realize millisecond-level fast filling and drastically shortened molding cycles, while maintaining micron-level molding precision and long-term operational stability. It achieves high-speed operation without sacrificing stability and high efficiency without compromising product quality. Against the backdrop of lightweight packaging and increasingly fierce capacity competition in the plastics-processing industry, Lisong high-speed machines empower customers to realize high-efficiency, precision-oriented and low-cost production through well-optimized, robust structures. It has become core equipment for thin-wall product manufacturers to boost productivity, improve quality and seize market opportunities.

      All technical parameters, efficiency improvements, energy‑saving ratios, and production cycle data on this page are obtained under Lisong’s standard laboratory test conditions and are for product performance reference only. Actual production results may vary due to multiple external factors, including but not limited to mold structure, product wall thickness, raw material types, production environment, process settings, operator commissioning and equipment maintenance status. These data shall not constitute a guarantee for equipment quality and performance.