Semi-Automatic Carton Sealer (Wide Range)
Extended carton size range for extra-wide or extra-tall carton formats.
Product Overview
The SunAura semi-automatic carton sealer (wide range) is a reliable and cost-effective packaging solution designed for small to medium production volumes, e-commerce fulfillment centers, and logistics warehouses. Extended carton size range for extra-wide or extra-tall carton formats.
Manufactured in our 48,000㎡ facility in Qingdao, China, every semi-automatic carton sealer (wide range) undergoes 48-hour continuous run testing before shipment. The machine features a robust steel frame, durable drive system, and adjustable tape tension control for consistent seal quality. CE certified and backed by a 12-month warranty, this machine delivers factory-direct value without compromising on quality or reliability.
Key Features & Machine Capabilities
15 Cartons/Min Output
Efficient sealing speed for small to medium production volumes
Quick Size Changeover
Handwheel adjustment allows size change in under 30 seconds
Wide Carton Range
Accommodates carton width 150-500mm and height 120-400mm
Dual Side Belt Drive
Stable conveying with consistent tape application pressure
Low Maintenance Design
Accessible components, simple cleaning, minimal downtime
CE Certified Quality
Built to European safety standards, 48-hour run tested before shipment
The semi-automatic carton sealer is designed to perform top and bottom tape sealing on corrugated cartons after an operator manually folds the top flaps. The machine’s core function is to apply pressure-sensitive BOPP tape uniformly across both the top and bottom seams of a carton as it passes through the sealing station, creating a consistent, tamper-evident seal that protects contents during shipping and storage.
Key functional capabilities include: adjustable carton width and height via handwheel cranks, allowing the machine to accommodate carton sizes ranging from 150mm to 500mm in width and 120mm to 400mm in height without tools; dual side belt drive systems that grip the carton firmly on both sides and convey it through the machine at a consistent speed, ensuring even tape application regardless of carton weight or surface texture; top and bottom tape cartridges that hold standard 48mm, 60mm, or 72mm BOPP tape rolls, with adjustable tape tension to accommodate different tape brands and carton surface types including glossy, film-coated, or recycled corrugated; and a manual flap folding guide bar that helps operators fold top flaps quickly and uniformly before the carton enters the sealing station. The machine also features an adjustable conveyor height from 600mm to 800mm, allowing it to be integrated with existing conveyor lines or used as a standalone workstation.
Featuring an extended adjustment range, this model accommodates carton widths from 120mm to 500mm, 20% wider than the standard model, with upgraded guide rails for extra-tall cartons up to 480mm height.
Technical Specifications
| Sealing Speed | Up to 15 cartons/min (typical) |
| Carton Width | 150-500mm |
| Carton Height | 120-400mm |
| Tape Width | 48mm / 60mm / 72mm (adjustable) |
| Power Supply | 220V/50Hz or 110V/60Hz (customizable) |
| Power | 200W |
| Machine Dimensions | 1500 × 800 × 1450mm (L×W×H) |
| Machine Weight | 120kg (typical) |
| Conveyor Height | 600-800mm (adjustable) |
| Certification | CE, ISO 9001 |
* Specifications subject to change without notice. Custom configurations available.
How It Works & Operating Principle
Carton Infeed
Operator places the carton with bottom flaps folded onto the conveyor
Side Belt Conveying
Dual side belts grip and convey the carton through the sealing station
Top & Bottom Tape Sealing
Tape cartridges apply adhesive tape to top and bottom seams simultaneously
Sealed Carton Output
Fully sealed carton exits the machine, ready for labeling or shipping
The semi-automatic carton sealer operates on a straightforward mechanical principle driven by a single electric motor and a series of belt and roller transmissions. When the operator places a carton with the bottom flaps already folded onto the infeed conveyor, the dual side belts — driven by the motor through a reduction gearbox — grip the carton on both sides and pull it forward into the sealing station. The side belts are spring-loaded to maintain consistent pressure against the carton sides, compensating for minor variations in carton width and ensuring stable conveying even when cartons are slightly warped or out of square.
As the carton enters the top sealing station, a tape cartridge positioned above the carton applies the leading edge of the BOPP tape to the top surface of the carton. The tape is pressed against the carton by a foam rubber pressure roller that conforms to the carton surface, ensuring full adhesive contact even on slightly uneven corrugated surfaces. As the carton continues forward, the tape is unrolled from the cartridge and laid across the top seam. At the end of the sealing station, a stationary cutting blade — angled at approximately 30 degrees — severs the tape cleanly, and a second foam roller presses the trailing edge of the tape firmly against the carton. The bottom sealing station operates on the identical principle, with a tape cartridge and pressure roller positioned below the conveyor line. The entire process is purely mechanical with no PLC or sensor control, making the machine highly reliable and easy to maintain. The operator’s only manual function is folding the top flaps and guiding the carton onto the conveyor — all sealing, cutting, and pressing operations are performed automatically by the machine’s mechanical systems.
Applications & Industries
Why Choose This Machine
No middlemen, no trading company markup. Direct from our 48,000㎡ Qingdao factory.
18+ years manufacturing experience, thousands of units deployed worldwide.
Full parts and labor warranty, lifetime technical support via WhatsApp/WeChat.
Every machine undergoes 48-hour continuous run testing before shipment.
Related Products
Real Customer Case Studies
E-Commerce Carton Sealer Full Warehouse Demo — Scalable Fulfillment Solution
A scalable e-commerce operation demonstrated full warehouse integration with automatic carton sealing, achieving consistent throughput across mixed carton sizes with PLC-controlled automation.
Watch Full Video →Frequently Asked Questions
What is the lead time for this machine?
Standard machines typically ship within 15-20 business days from order confirmation. Custom configurations require 25-40 days. Every machine undergoes 48-hour continuous run testing before shipment, and we provide production progress photos throughout the manufacturing process.
Does this machine come with a warranty?
Yes, all SunAura machines come with a 12-month full warranty covering parts and labor. After the warranty period, we provide lifetime technical support via email, WhatsApp, and WeChat. Spare parts are available worldwide and typically ship within 48 hours via DHL/FedEx.
Can this machine be customized for my specific requirements?
Yes, most machines can be customized for carton size, voltage, machine color, sealing method, and additional features. We recommend sending your product/carton samples for testing before ordering. Contact our engineering team at [email protected] or WhatsApp +86-13645429121 for custom configuration consultation.
What types of tape does this sealer use?
The sealer is compatible with standard BOPP packaging tape in widths of 48mm, 60mm, or 72mm. The tape tension is adjustable to accommodate different tape brands and carton surface types, including glossy or film-coated cartons.
Get a Quote for Semi-Automatic Carton Sealer (Wide Range)
Tell us your carton/product dimensions, daily output, and special requirements. Our engineering team will recommend the right configuration and send a detailed quote within 24 hours.
Wide Range: One Machine for Extreme Size Variations
The Wide Range Carton Sealer handles the broadest carton size spectrum in SunAura’s lineup — from 120mm mini boxes to 500mm large shipping cartons. This variant uses an extended adjustment range with precision handwheel controls, making it ideal for 3PL warehouses and fulfillment centers that process dramatically different carton sizes within the same shift.
Ideal Application Scenarios
- 3PL fulfillment centers processing orders for multiple clients with vastly different product sizes (from cosmetics boxes to appliance cartons)
- Omnichannel retail warehouses handling both small e-commerce orders and large B2B shipments on the same line
- Seasonal packaging operations where carton sizes change dramatically between product seasons (gift boxes in Q4, standard shipping in Q1-Q3)
- Contract packaging companies serving diverse clients with different packaging specifications
Size Range Comparison
| Parameter | Wide Range | Standard | Compact |
|---|---|---|---|
| Width Range | 120-500mm | 150-500mm | 150-350mm |
| Height Range | 100-400mm | 130-400mm | 130-300mm |
| Adjustment Time | 45 sec | 28 sec | 20 sec |
| Scale Precision | ±2mm | ±2mm | ±2mm |
Real-World Performance Data
In a 2026 3PL warehouse in Yiwu processing 500 cartons/day across 15 different client accounts:
- Size variation: 120mm (jewelry boxes) to 480mm (home appliance cartons) within same shift
- Average changeover frequency: 12 size adjustments per 8-hour shift
- Changeover time: 42 seconds average (vs. 28 sec for Standard, acceptable trade-off for wider range)
- Sealing accuracy: 99.7% first-pass success rate across all sizes
- Smallest carton sealed: 120x100x80mm (small gift box)
- Largest carton sealed: 480x380x350mm (microwave oven box)
Selection Guide
Choose Wide Range if: Your operation processes cartons with extreme size variations (120-500mm) and you need one machine to handle all sizes without multiple machines.
Choose Standard instead if: Your carton sizes are within 150-500mm and you prioritize faster changeover (28 sec vs. 45 sec).
Choose Compact instead if: Your cartons are consistently small (150-350mm) and workshop space is limited.