8-Station Rotary Prefilled Bag Lines

Say Goodbye to Roll Film Limitations and Manual Bagging: Experience Premium Automated Premade Pouch Packaging

The Automatic 8-Station Rotary Premade Pouch Packaging Line (LT8-250 and LT8-350 Series) is an industrial-grade, high-efficiency automation assistant designed to solve high-end pouch packaging pain points such as slow manual filling, unappealing roll-film bag shapes, difficult premade stand-up pouch automation, and material entrapment or wrinkling at seals.

LANTU Machinery introduces core models including the LT8-250 (Standard 8-Station Premade Pouch Unit) and the LT8-350 (Heavy-Duty Wide-Pouch 8-Station Unit). Featuring precision mechanical indexing rotary drive, vacuum suction pouch opening, servo/pneumatic anti-clamping filling, and dual heat-sealing/shaping mechanisms, combined with eight standardized stations (1. Pouch Pickup/Feeding $\rightarrow$ 2. Date Printing/Coding $\rightarrow$ 3. Opening/Zipper Opening $\rightarrow$ 4. Filling/Material Discharge $\rightarrow$ 5. Settling/Pouch Stretching $\rightarrow$ 6. Reserved/Secondary Filling/Gas Flushing $\rightarrow$ 7. Heat Sealing $\rightarrow$ 8. Cooling Shaping & Finished Product Output), the equipment acts like a precise and fast premade pouch packaging expert. Whether handling stand-up pouches, zipper pouches, pouch with handles, 4-side seal pouches, gusseted pouches, or irregular premade pouches, it achieves automated pouch pickup, precise coding, pneumatic opening, damage-free filling, vibratory settling, and flat sealing in one seamless operation—ensuring smooth, wrinkle-free seals, high-end presentation, and zero pouch waste.

As an original manufacturer of packaging machinery, LANTU Machinery has simplified the complex fully automatic rotary process—premade pouch vacuum pickup, coding positioning, air-blast opening, synchronized feeding, base settling, and high-pressure sealing—into an operation as simple as using a smartphone. Operators simply adjust the pouch width with a single touch on the PLC touchscreen (automatic mechanical gripper width adjustment), place stacked premade pouches into the pouch magazine, and the machine automatically performs pouch pickup, opening, synchronized discharging with multi-head weighers/auger fillers/liquid pumps, and smooth output of factory-ready premium pouches. With pouch widths ranging from 100mm to 350mm, this series significantly shortens packaging workflows while saving labor, time, and costs.

Choosing a reputable source manufacturer is crucial for your return on investment. LANTU Machinery’s proven rotary indexing drive and vacuum opening/sealing technologies, combined with robust reliability and industry-leading premade pouch utilization, ensure smooth, zero-breakdown operation on your premade pouch packaging lines.

Core Components and Three System Guarantees (LANTU Precision Parts)

Our 8-station rotary premade pouch packaging lines are equipped with industry-leading components to guarantee high quality, flawless performance, and ultra-long service life from the source.

1. Pouch Pickup, Opening, and Feeding System

Vacuum Suction Pickup & Horizontal Feeding Mechanism: Equipped with imported SMC vacuum generators and wear-resistant silicone suction cups for stable pouch picking without double-feeding. Top-loading horizontal pouch magazine allows non-stop pouch replenishment during operation.

Dual-Axis Pneumatic Opening & Air-Blast Expansion: Synchronized top and bottom vacuum suction cups pull the pouch open, paired with high-pressure air injection nozzles and zipper opening devices to guarantee 100% successful opening of tough zipper stand-up pouches.

One-Touch Motorized/Automatic Gripper Adjustment: When changing pouch specifications, simply enter the pouch width on the touchscreen, and the system automatically moves all 8 gripper stations in unison within 3 minutes.

2. Filling, Settling, and Dual Heat-Sealing System

No-Pouch / Unopened-Pouch No-Fill Protection: Smart sensors detect pouch opening status in real time. If a pouch fails to open, filling and sealing are bypassed, allowing the pouch to be reused without material waste or machine contamination.

Base Tapping Settling & Pouch Stretching Mechanism: The filling station features pneumatic tapping and base vibration devices to quickly settle bulky or light materials; stretching grippers straighten the pouch top before sealing to ensure flat, wrinkle-free seams.

Dual Heat Sealing & Cold Shaping: Features a first-stage high-pressure heat seal, a second-stage smooth heat seal/knurled embossing, and a third-stage cold air flattening station to ensure firm, aesthetically pleasing, burst-proof, and leak-proof seals.

3. Intelligent Control and Safety Protection System

Siemens / Mitsubishi PLC Central Control: Industrial-grade multi-core CPU control providing stable operation, strong anti-interference capabilities, and support for 10 languages.

Multi-Head Filler Seamless Interlock Interface: Built-in standardized communication protocols seamlessly connect with 10/14-head combination weighers, auger fillers, liquid/paste dosing pumps, and tablet counters.

Fully Enclosed Safety Guard Doors: Heavy-duty 304 stainless steel body equipped with transparent safety doors that automatically pause operation when opened, complying with GMP and food/pharma hygiene standards while ensuring operator safety.

Technical Specifications

To meet the diverse demands of different factories regarding pre-made pouch dimensions, pouch styles (stand-up, zipper, handle pouches), and packaging speeds, Lanto Machinery offers two core models of Automatic 8-Station Rotary Premade Pouch Packaging Lines:

Technical Parameter	LT8-250 (Standard 8-Station Rotary Line)	LT8-350 (Heavy-Duty Wide-Pouch 8-Station Line)
Compatible Pouch Types	Stand-up pouch, zipper bag, 4-side seal bag, 3-side seal flat bag, handle pouch, shaped bag, etc.	Stand-up pouch, zipper bag, heavy 4-side seal bag, handle pouch, side-gusset bag, large shaped bag, etc.
Pouch Size Range (W×L)	Width: 100 – 250 mm / Length: 100 – 350 mm	Width: 200 – 350 mm / Length: 150 – 450 mm
Weighing / Capacity Range	10g – 1500g (Depends on dosing system)	500g – 5000g (Depends on dosing system)
Number of Stations	8 Stations (Pouch Pick – Date Print – Open/Unzip – Fill – Settle – Gas Flush/2nd Fill – Seal – Output)	8 Stations (Pouch Pick – Date Print – Open/Unzip – Fill – Settle – Gas Flush/2nd Fill – Seal – Output)
Max. Packaging Speed	25 – 60 bags/min (Depends on material flowability and dosing speed)	15 – 45 bags/min (Depends on material flowability and dosing speed)
Gripper Width Adjustment	Automatic synchronized 8-station adjustment via PLC Touchscreen	Automatic synchronized 8-station adjustment via PLC Touchscreen
Opening & Safety Protection	Vacuum suction opening + air blowing + “No Pouch – No Fill – No Seal” protection	Dual vacuum suction opening + air blowing + “No Pouch – No Fill – No Seal” protection
Sealing & Cooling Method	Independent PID + 1st High-Pressure Heat Seal + 2nd Mesh Embossing + 3rd Cold Pressing	Independent PID + 1st High-Pressure Heat Seal + 2nd Heavy Embossing + 3rd Cold Pressing
Applicable Pouch Material	Laminated pre-made pouches (OPP/CPP, PET/PE, Alu Foil, Paper-Plastic, etc.)	Heavy laminated pre-made pouches (OPP/CPP, PET/PE, Alu Foil, Nylon, etc.)
Operator Control System	Siemens/Mitsubishi PLC + 7/10-inch Color Touchscreen	Siemens/Mitsubishi PLC + 10-inch Color Touchscreen
Air Supply & Consumption	0.6 – 0.8 MPa ($\ge 0.5\text{ m}^3\text{/min}$)	0.6 – 0.8 MPa ($\ge 0.65\text{ m}^3\text{/min}$)
Power Supply & Rating	AC 220V/380V / 50Hz / 3.5 kW	AC 380V / 50Hz / 5.5 kW
Machine Construction	Full 304 Stainless Steel / Transparent Safety Guards (GMP Compliant)	Heavy-Duty 304 Stainless Steel / Transparent Safety Guards (GMP Compliant)
Compatible Dosing Units	Multihead Weigher / Servo Auger Filler / Liquid-Paste Pump / Counting Bowl	Heavy-Duty Multihead Weigher / Large Auger / Heavy Liquid Pump / Dual Feeders

 

Detailed 8-Station Operational Process

Station 1 (Pouch Pickup/Feeding): The horizontal magazine pushes premade pouches to the pickup position, where vacuum suction cups grip and deliver them to mechanical grippers.

Station 2 (Date Printing/Coding): Optional ribbon coders, inkjet printers, or Thermal Transfer Overprinters (TTO) print manufacture dates and batch codes precisely on designated pouch areas.

Station 3 (Opening/Zipper Opening): Top and bottom vacuum suction cups pull the pouch top open while air nozzles blast air to expand the pouch bottom; zipper opening devices unseal zipper tracks simultaneously.

Station 4 (Filling/Discharge): Dosing systems (weighers, augers, liquid pumps) release precise quantities upon receiving signals; filling nozzles feature anti-drip and anti-clamping guards.

Station 5 (Settling/Pouch Stretching): Bottom vibration tappers knock the pouch base to settle contents, creating clean clearance for sealing; supports optional secondary filling.

Station 6 (Gas Flushing/Reserved): Optional nitrogen flushing module displaces oxygen for freshness preservation, or serves as a third filling/liquid dosing station.

Station 7 (Heat Sealing): PID temperature-controlled heating jaws close under high pressure to form a tight, attractive seal across the pouch top.

Station 8 (Cooling Shaping & Output): Cooling bars rapidly press and smooth the sealed seam before finished pouches are discharged smoothly via conveyor.

Suitable Materials and Packaging Types

LANTU Machinery’s 8-station rotary premade pouch packaging lines offer superior compatibility and customized designs for diverse industries and container formats:

1. Applicable Materials (Granules, Powders, Liquids & Mixed Products)

Snacks & Granules: Nuts, puffed foods, jerky, candies, roasted seeds, freeze-dried products, pet foods, etc.

Powders & Condiments: Milk powder, coffee powder, seasoning powders, flour, detergent powder, herbal powders, etc.

Liquids & Pastes: Sauces, detergents, butter, fruit juices, hot pot soup bases, cosmetic lotions, etc.

Mixed/Composite Products: Liquid + solid combinations (e.g., pickles, sauerkraut, canned meal kits) using multi-filler stations.

2. Applicable Premade Pouch Formats (Pre-Printed Finished Pouches)

Stand-Up Pouches / Zipper Stand-Up Pouches (Doypack): The most popular premium retail pouch format.

4-Side Seal Pouches / Flat Pouches: Common format for pharmaceuticals, facial masks, and fine chemicals.

Pouches with Handles / Shaped Pouches: Large-capacity snack pouches or high-end gift bags.

5 Reasons to Choose LANTU Machinery’s 8-Station Rotary Premade Pouch Packaging Lines

High precision, low maintenance, and long-term stability are essential when investing in automated packaging lines. LANTU Machinery delivers plug-and-play, durable solutions for every factory.

Zero Pouch Waste & Zero Contamination Protection: Bypasses discharging and sealing if a pouch is missing or unopened, preserving premade pouches for reuse and keeping hoppers clean.

Ultra-Clean Pneumatics & Vibration-Damped Circuits: All electrical wiring and pneumatic piping undergo modular anti-vibration and dustproof sealing to lower operational breakdown rates.

Pre-Factory Real-Pouch & Material Running Tests: Every unit undergoes continuous running tests across high, medium, and low speeds with various pouch materials (aluminum foil, PE, laminated films) before dispatch to ensure zero pouch-picking or sealing errors.

Dual Voltage and Air Pressure Stabilization: Built-in wide-range voltage regulators and pneumatic overload protection handle power and pressure fluctuations to guarantee consistent pulling and sealing quality.

Modular Quick-Change & One-Touch Adjustment: Motorized automatic gripper width adjustment allows switching between different pouch dimensions in minutes, drastically reducing downtime.

Key Factors to Consider When Purchasing an 8-Station Rotary Premade Pouch Packaging Line

To help you choose the best machine for your production line, consider the following key selection criteria:

Premade Pouch Dimensions and Maximum Width:

Pouch Width 100mm–250mm, Length 100mm–350mm: Select LT8-250;

Pouch Width 200mm–350mm, Length 200mm–450mm: Select LT8-350.

Compatible Dosing Filler Types:

Granules / Bulk Items: Pair with Combination Weighers;

Fine Powders: Pair with Servo Auger Fillers;

Liquids / Pastes: Pair with Pneumatic/Servo Liquid & Paste Piston Pumps;

Mixed Products: Utilize Dual Dosing Stations (Station 4 + Station 6).

Pouch Material and Zipper Features: Zipper presence (requires zipper opener) or spout features (requires spout positioning device).

Target Capacity (BPM): Select optimal rotary speed and dosing response times based on speed requirements (e.g., 25–60 pouches/min).

Special Functional Modules: Nitrogen gas flushing, vacuum air extraction, date coding (ribbon/inkjet/laser/TTO), heavy-duty base settling, or secondary sealing.

Frequently Asked Questions (FAQ)

Q1: How do I choose between LT8-250 and LT8-350?

A: Selection depends primarily on your maximum premade pouch width. If your pouch width is within 250mm (e.g., standard 100g–1kg stand-up pouches), the LT8-250 offers the best value. If your pouch width ranges between 250mm and 350mm (e.g., 1kg–5kg large bags or pet food bags), select the LT8-350 heavy-duty unit.

Q2: If a premade pouch fails to open, will material spill and contaminate the machine?

A: Absolutely not. The machine is equipped with no-pouch/unopened-pouch detection sensors. If a pouch fails to open, the system automatically skips dosing and sealing. The material remains safely in the hopper while the pouch moves to the next cycle or triggers a notice.

Q3: Is gripper adjustment complicated when changing to a different pouch size?

A: Extremely simple. The machine features motorized one-touch width adjustment. Enter your target pouch width on the PLC touchscreen, and all 8 station grippers adjust automatically in unison within minutes.

Contact the Source Manufacturer Today to Get Your Customized 8-Station Premade Pouch Packaging Solution!

LANTU Machinery — Dedicated Packaging Machinery Manufacturing, Source Factory Quality Guaranteed.