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China SK-780U 780 Ton Two-Platen Injection Molding Machine - Reliable Suppliers and Factory for Plastic Products
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China SK-780U 780 Ton Two-Platen Injection Molding Machine - Reliable Suppliers and Factory for Plastic Products

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Model No.: SK-780U

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The SK-780U is a high-performance machine designed for the production of various plastic products. As a reliable choice among China suppliers, this factory model ensures efficiency and quality in manufacturing. We offer flexible delivery terms including FOB, CFR, CIF, EXW, and CIP, catering to your logistics needs. Payment options are varied, including T/T, L/C, Western Union, and MoneyGram, with accepted currencies such as USD, CNY, EUR, and many others. Trust in our factory to deliver exceptional products for your business needs.

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  • Suitable Material PP, PS, PE, ABS
  • Clamping force (KN) 7800 KN
  • Theoretical Shot Volume(cm³) 2977-3636 cm³
  • Theoretical Injection weight (PET) 2709-3309 g
  • Tie-bar Distance 1070×940 mm
  • Open stroke(mm) 1700/1000 mm
  • Voltage 3 Phases 380V / 440V(Optional) / 220V(optional), 50HZ/60HZ

Product Introduction

The Strategic Bridge: Elevating Mid-Range to Large-Scale Production

Engineered to seamlessly bridge the gap between mid-range and large-scale manufacturing, the SUCCESSOR SK-780U Two-Platen Injection Molding Machine takes the core strengths of the SK-U series and elevates them with enhanced rigidity and unparalleled operational flexibility. This machine is designed for producers who are scaling up and require a solution that can handle larger volumes without compromising on the precision and reliability that define the series. Its high-rigidity clamping unit, perfectly paired with advanced precision guidance systems, ensures stable platen movement with a guaranteed accuracy of ±0.05mm. This level of precision is critical for achieving consistent part quality, especially when running complex or large-format production runs where tight tolerances are non-negotiable.

To maximize yield and minimize errors, the SK-780U is equipped with a three-rod, single-cylinder braking system. This configuration guarantees precise synchronization across all mold operations, from opening to closing and ejection, eliminating timing errors and significantly boosting product yield. Performance is further enhanced by an instantaneous response system, coupled with high-response dual proportional valves, which deliver rapid, reliable performance and rock-solid control over the entire process. The machine's thoughtful design extends to its adaptability; the independent high-pressure cylinder allows for easy tie-bar extraction, seamlessly adapting to low-headroom workshops and maximizing space utilization. Durability is a cornerstone, achieved through uniform-stress guide posts that are specially treated for superior wear and corrosion resistance, ensuring over 99% force uniformity to prevent eccentric loading and maximize the machine's service life. The reinforced platen provides exceptional mold-closing stability, while the extended stroke accommodates deep-cavity molds, offering a more cost-effective alternative to bulkier three-plate machines. The streamlined architecture simplifies maintenance, particularly for the movable platen and brake components, and its automated parameter setup enables quick and efficient mold changes, dramatically improving operational efficiency. Ideal for automotive interior parts, large packaging containers, and critical industrial components, the SK-780U is a versatile and robust solution, combining precision, durability, and energy efficiency for high-demand mid-to-large volume production.

Core Engineering Highlights

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Shock-Free Synchronous Braking

A buffered mechanism ensures rapid, reliable clamping with zero impact.

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Independent High-Pressure Cylinder

Facilitates controlled, slow high-pressure opening and enables easy tie-bar extraction for low-headroom facilities.

03

High-Rigidity Precision Guidance

An L-shaped rail on a robust frame guarantees ±0.05mm accuracy, ensuring rapid and stable platen movement.

04

Durable Guide Posts with Uniform Stress

Specially treated for rigidity and wear/corrosion resistance, these posts achieve over 99% force uniformity to prevent eccentric loading and maximize service life.

SK-2800U 2800Ton Two-Platen Injection Molding Machine
Exceptional Precision in Mold Opening Position
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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
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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 your valuable molds are protected with maximum reliability.

High-Speed Performance, Lower Cycle Times
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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-780U
Description Item Unit A B C
INJECTION UNIT Screw Diameter MM 95 100 105
Screw L/D Ratio L/D 21.2 20.1 19.1
Shot Size (Theoretical) CM³ 2977 3300 3636
Injection Weight (PS) G 2709 3003 3309
Injection Rate G/S 562 623 686
Plasticizing Capacity G/S 72 85 95
Injection Pressure MPA 158 143 130
Screw Speed RPM 0 - 130
CLAMPING UNIT Clamp Tonnage KN 7800
Space Between Tie Bars MM 1070×940
Opening Stroke MM 1700/1000
Max. Mold Height MM 1100
Min. Mold Height MM 400
Max. Daylight MM 2100
Ejector Stroke MM 300
Ejector Tonnage KN 150
Ejector Number PCS 17
OTHERS Max. Pump Pressure MPA 17.5/21
Pump Motor Power KW 48+48+13
Heater Power KW 46.45
Machine Dimension (L×W×H) M 8.5×2.7×2.5
Machine Weight T 30
Oil Tank Capacity L 1000
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Packaging & Shipping

Two-Platen Injection Molding Machine Packaging (1)
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Two-Platen Injection Molding Machine Packaging (4)
Two-Platen Injection Molding Machine Packaging (5)
Two-Platen Injection Molding Machine Packaging
Frequently Asked Questions
What is the clamping force of the SK-780U Two-Platen Injection Molding Machine?
The SK-780U delivers a clamping force of 7,800 KN (780 tons). It is designed to handle large-format and deep-cavity molds, making it ideal for automotive interior parts, large packaging containers, and industrial components that require high and stable clamping force throughout the production cycle.
What platen movement accuracy does the SK-780U achieve?
The SK-780U features a high-rigidity clamping unit with an L-shaped rail precision guidance system, guaranteeing a platen movement accuracy of ±0.05mm. This ensures consistent, repeatable part quality even during complex or high-volume production runs where tight dimensional tolerances are critical.
How does the SK-780U protect molds during operation?
The SK-780U incorporates an intelligent deceleration control system with ultra-sensitive mold protection, meeting the "A4 paper rebound" standard. The machine will detect and stop on the slightest obstruction during mold closing, preventing damage to expensive tooling. This level of sensitivity is a defining feature of the entire SK-U series.
Is the SK-780U suitable for low-headroom factory environments?
Yes. The SK-780U is equipped with an independent high-pressure cylinder that enables easy tie-bar extraction. This design allows the machine to be installed and operated in workshops with limited overhead clearance, maximizing space utilization without compromising on performance or accessibility for maintenance.
What industries and applications is the SK-780U best suited for?
The SK-780U is ideally suited for mid-to-large scale production across a variety of industries, including automotive (interior trim panels, bumpers), consumer goods (large packaging containers, storage products), and industrial manufacturing (pallets, crates, and structural components). Its combination of high precision, large mold capacity, and energy efficiency makes it a versatile choice for demanding production environments.
What are the main dimensions and weight of the SK-780U machine?
The SK-780U has an overall machine dimension of 8.5 × 2.7 × 2.5 meters (L×W×H) and a total machine weight of 30 tons. The oil tank capacity is 1,000 liters. The pump motor power is 48+48+13 KW, and the heater power is 46.45 KW, reflecting the machine's robust engineering for high-demand production environments.