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SK-680U 680Ton Two-Platen Injection Molding Machine
SK-U Series Two Platen Injection Molding Machine

SK-680U 680Ton Two-Platen Injection Molding Machine

Model No.: SK-680U

Application: Making Virous Plastic Product
Accepted Delivery Terms: FOB,CFR,CIF,EXW,CIP;
Payment accepts: T/T, L/C, Western Union, MoneyGram
Accepted Payment Currency: USD, USTD, CNY, EUR, AUD, CAD, CHF, DKK, EUR, GBP, HKD, JPY, NOK, NZD, SEK, SGD, AED, IDR, NGN, BRL, MXN, MYR, PHP, BRL, ZAR etc.

  • Suitable Material PP, PS, PE, ABS
  • Clamping force (KN) 6800 KN
  • Theoretical Shot Volume(cm³) 2327-2907 cm³
  • Theoretical Injection weight (PET) 2118-2645 g
  • Tie-bar Distance 960x900 mm
  • Open stroke(mm) 1800/1200 mm
  • Voltage 3 Phases 380V / 440V(Optional) / 220V(optional), 50HZ/60HZ

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. At the heart of its design is a high-rigidity clamping unit, integrated with L-shaped precision guidance rails on a robust, engineered frame. This structural integrity guarantees an impressive movement accuracy of ±0.05mm, ensuring rapid and stable platen operation that maintains its precision even during the most demanding, long-duration production runs.

A key feature that protects your investment is the shock-free synchronous braking system, equipped with a sophisticated buffered mechanism. This technology enables zero-impact clamping, eliminating the stress and shock that can damage both expensive molds and delicate components, thereby extending equipment life and ensuring consistent part quality. The machine's adaptability is further enhanced by the independent high-pressure cylinder, which facilitates a controlled, slow high-pressure opening and allows for effortless tie-bar extraction. This makes the SK-680U an exceptional choice for workshops and facilities with low-headroom constraints. The machine's core reliability is reinforced by specially treated, uniform-stress guide posts that achieve over 99% force uniformity, effectively preventing eccentric loading and dramatically extending the service life of the entire unit. With a reinforced platen for superior mold-closing stability and an extended stroke designed to accommodate deep-cavity molds, it offers a significant cost advantage over traditional three-plate machines. The streamlined design simplifies routine maintenance, while its automated computer-controlled setup allows for fast, accurate, and intuitive mold adjustments. Perfect for automotive accessories, large household appliance parts, and medium-sized packaging, the SK-680U integrates high-response dual proportional valves for unparalleled operational control, striking the perfect balance between productivity, precision, and cost-effectiveness for growing manufacturing operations.

Core Engineering Highlights

Exceptional Precision in Mold Opening Position
01

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
02

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
03

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

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Machine Specifications

MODEL

SK-680U

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 (LxWxH)

M

8.6×2.6×2.5

Machine Weight

T

25

Oil Tank Capacity

L

950

Certifications

Certifications (1)
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Certifications (5)
Certifications (6)
Certifications (7)
Certifications (8)
Certifications (9)
Certifications (10)
01020304050607080910

Company Exhibition

Certifications (1)
Certifications (2)
Certifications (4)
IMG_20190524_120408
Certifications (5)
Certifications (3)

Clients plants site

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Clients plants site
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Packaging & Shipping

Two-Platen Injection Molding Machine (1)
Two-Platen Injection Molding Machine (2)
Two-Platen Injection Molding Machine (3)
Two-Platen Injection Molding Machine (4)
Two-Platen Injection Molding Machine (5)
Two-Platen Injection Molding Machine a

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