China SK-680U 680Ton Two-Platen Injection Molding Machine - Reliable Suppliers and Factory Solutions
Product Introduction
The Entry-Level Powerhouse: Precision and Efficiency for Mid-Sized Manufacturing
The SUCCESSOR SK-680U represents the gateway to high-performance injection molding, redefining the standard for entry-level machines. Engineered as a high-performance model within the SK-U series, it is purpose-built to deliver exceptional efficiency and precision, making it the ideal foundation for mid-sized manufacturing operations seeking to elevate their production capabilities.
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High-Rigidity Clamping Unit
Integrated L-shaped precision guidance rails on a robust engineered frame guarantee movement accuracy of ±0.05mm, ensuring rapid and stable platen operation during long-duration production runs.
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Shock-Free Synchronous Braking
A sophisticated buffered mechanism enables zero-impact clamping, eliminating stress and shock that can damage expensive molds and delicate components, extending equipment life.
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Independent High-Pressure Cylinder
Facilitates controlled, slow high-pressure opening and allows effortless tie-bar extraction — ideal for workshops with low-headroom constraints.
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99%+ Force Uniformity Guide Posts
Specially treated, uniform-stress guide posts effectively prevent eccentric loading and dramatically extend the service life of the entire unit.
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Reinforced Platen & Extended Stroke
Superior mold-closing stability and extended stroke accommodate deep-cavity molds, offering a significant cost advantage over traditional three-plate machines.
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High-Response Dual Proportional Valves
Integrated for unparalleled operational control, striking the perfect balance between productivity, precision, and cost-effectiveness. Ideal for automotive accessories, large household appliance parts, and medium-sized packaging.
Core Engineering Highlights
Shock-Free Synchronous Braking
A buffered mechanism ensures rapid, reliable clamping with zero impact.
Independent High-Pressure Cylinder
Facilitates controlled, slow high-pressure opening and enables easy tie-bar extraction for low-headroom facilities.
High-Rigidity Precision Guidance
An L-shaped rail on a robust frame guarantees ±0.05mm accuracy, ensuring rapid and stable platen movement.
Durable Guide Posts with Uniform Stress
Specially treated for rigidity and wear/corrosion resistance, achieving over 99% force uniformity to prevent eccentric loading and maximize service life.
Exceptional Precision in Mold Opening Position
Achieves a repeatable mold opening accuracy of ±0.2mm — a fivefold improvement over standard three-plate machines. (Verified by internal 1200-ton testing).
Ultra-Sensitive Mold Protection
SK-U series machines' intelligent deceleration control provides unparalleled sensitivity, achieving the "A4 paper rebound" standard. It can stop on the slightest obstruction, ensuring maximum mold protection.
High-Speed Performance, Lower Cycle Times
Experience significantly faster dry cycles. Our optimized system delivers rapid mold opening and clamping, translating directly into enhanced productivity and greater output. (Verified by 1200-ton internal testing).
Partial Product
Machine Specifications
| MODEL | SK-680U | ||||
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| Description | Item | Unit | A | B | C |
| INJECTION UNIT | Screw Diameter | MM | 85 | 90 | 95 |
| Screw L/D Ratio | L/D | 22.3 | 19.7 | 18.6 | |
| Shot Size (Theoretical) | CM³ | 2327 | 2609 | 2907 | |
| Injection Weight (PS) | G | 2118 | 2374 | 2645 | |
| Injection Rate | G/S | 543 | 608 | 678 | |
| Plasticizing Capacity | G/S | 63 | 74 | 88 | |
| Injection Pressure | MPA | 163 | 146 | 131 | |
| Screw Speed | RPM | 0 – 150 | |||
| CLAMPING UNIT | Clamp Tonnage | KN | 6800 | ||
| Space Between Tie Bars | MM | 960×900 | |||
| Opening Stroke | MM | 1800/1200 | |||
| Max. Mold Height | MM | 1000 | |||
| Min. Mold Height | MM | 400 | |||
| Max. Daylight | MM | 2200 | |||
| Ejector Stroke | MM | 300 | |||
| Ejector Tonnage | KN | 150 | |||
| Ejector Number | PCS | 17 | |||
| OTHERS | Max. Pump Pressure | MPA | 17.5/21 | ||
| Pump Motor Power | KW | 31+42+13 | |||
| Heater Power | KW | 34.8 | |||
| Machine Dimension (L×W×H) | M | 8.6×2.6×2.5 | |||
| Machine Weight | T | 25 | |||
| Oil Tank Capacity | L | 950 | |||
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