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400-698-6306
Fully Automatic L-Type Sleeve Wrapping, Sealing and Shrinking Packaging Machine
SF-400LA/SF-LAC (Close-Contact Type) is a fully automatic, unmanned L-type sleeve wrapping and sealing packaging machine, widely used for high-efficiency batch packaging operations on production lines. It is equipped with an automatic film feeding and perforating device, a manually adjustable film guiding system, and a feed conveyor platform, making it suitable for products of varying widths and heights. The SF-400LAC model further includes a close-contact function, specifically designed for packaging small products with a length of less than 60mm.

SF-400LA/SF-LAC Series Technical Specifications

Core Product Profile

  • SF-400LA
    is a fully automatic unmanned L-type sealing and cutting machine, ideal
    for high-volume production line packaging with exceptional efficiency

  • Integrated automatic film feeding/perforation mechanism and manually adjustable film guiding system

  • Versatile feed conveyor platform accommodates products of varying dimensions

  • SF-400LAC model features specialized close-contact functionality for small-item packaging

Advanced Sealing System

  • Sealing blade with DuPont Teflon coating and high-temperature resistant aluminum alloy

  • Prevents cracking, charring, and smoking while ensuring zero contamination

Precision Detection System

  • Imported photoelectric sensors (horizontal and vertical detection sets)

  • Flexible switching capability between detection modes

  • Ensures reliable sealing performance for thin and small packaging items

Automated Operation Features

  • Automatic feeding with length adjustment via photoelectric sensor and timer integration

  • Induction motor-driven automatic waste film winding system

  • Manual wheel adjustment for quick size changes without mold replacement

Temperature Control & Safety

  • Original "AUTONICS" PID digital temperature controller

  • Highly responsive and precise sealing blade temperature control

  • Built-in blade protection prevents accidental product damage

  • Polycarbonate protective shield with automatic alarm system

Specialized Functions

  • Specially designed film synchronization mechanism prevents misalignment

  • Optional tear-notch functionality available

  • Full production line integration capability for unmanned operation

  • Supports combination packaging for promotional effects

Industry Applications

  • New energy, food, cosmetics, printing, pharmaceuticals, building materials

  • Financial sector, e-commerce logistics, hardware industries

  • Suitable for ultra-large volume shrink packaging applications

SF-4525 Shrinking Tunnel Features

  • Stainless steel heating elements with automatic heat dissipation

  • Extends machine service life by over 3 times

  • Adjustable temperature and conveyor speed with stable performance

  • Creates sealed, dust-proof and moisture-resistant packaging

Material Compatibility & Performance

  • Compatible with POF, PP, OPS and cross-linked films

  • High-power circulation motor ensures even heat distribution

  • Solid 45# steel roller shafts with silicone sleeves

  • Withstands heavy loads while preventing film scorching

System Integration

  • Compatible with fully automatic and semi-automatic sealing machines

  • Enables simplified operational workflow


ModelSF-400LASF-4525
Power2.2kw9kw
Power     SupplyAC 220V 1PH 50HzAC 380V 3PH 50Hz
Max. Packing Size L×W×HL+H≤530mm W+H≤430mm H≤135mm1000×300×200mm
Max. Sealing Size L×W×HL550×W450mm/
Packing Speed15m/min.0~20m/min.
External Air Source6-8kg/cm2/
Shrink FilmPOFPOF
Machine Size L×W×H1810×880×1600mm1300×800×1520mm
Packaging Size L×W×H1860×930×1750mm1350×850×1670mm
G./N. Weight483/453kgs270/240kgs



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