Designed for Malaysia 1kg and 3kg mayonnaise customer, we offered CX-730 vertical back sealing bag liquid packing machine+piston pump filling system. Also suit for other sticky thick liquid kind like tomato paste, peanut butter, salad dressing, chutney, ketchup, shampoo, olive oil, fruit chocolate jam, Mustard, margarine such cream sauce.

1. rotary pump elevator for sticky liquid

2. Support film width max 730mm, bag width 140~350mm for back sealing pouch bag

3. Piston filling pump with stiring function to ensure the mobility

A Vertical 1kg and 3kg Mayonnaise Filling Packing Machine is a specialized vertical form-fill-seal (VFFS) device engineered for automatic, precise packaging of viscous mayonnaise products into bags of 1kg and 3kg specifications. Tailored to the unique rheological properties of mayonnaise—high viscosity, poor fluidity, and susceptibility to air bubble entrapment—the machine integrates a dedicated viscous liquid filling system, leakproof sealing technology, and food-grade structural design, making it ideal for medium-to-large-scale condiment processing factories.

Core Working Principle & Operational Workflow

The machine executes a continuous vertical packaging process, from film unwinding to finished bag discharge, with key steps optimized for mayonnaise’s thick texture:

1. Film Unwinding & Bag FormingThe machine feeds a roll of high-barrier composite film (typically PET/AL/PE or BOPP/PE) into the forming station. Guided by a forming tube and shaping molds, the flat film is folded longitudinally and sealed along the side to form a vertical tube-shaped bag. The composite film’s aluminum foil layer provides excellent oxygen and light barrier properties, extending the shelf life of mayonnaise by preventing oxidation and spoilage. The machine is pre-calibrated to accommodate bag sizes matching 1kg and 3kg fill weights, with quick-adjustment mechanisms for switching between the two specifications.
2. Viscous Liquid Filling SystemThis is the core module of the machine, designed to handle mayonnaise without causing splashing, air bubble formation, or uneven filling:
   • A positive displacement piston filler is adopted to ensure precise volumetric control—critical for matching the 1kg and 3kg weight requirements (since mayonnaise’s density is relatively stable, volume can be accurately converted to weight).
   • The filling nozzle is designed with a retractable structure: it extends deep into the formed bag before filling starts, minimizing the drop height of mayonnaise to avoid air bubble entrapment; as filling progresses, the nozzle gradually retracts to prevent the viscous material from adhering to the bag’s sealing edges.
   • A PLC control system regulates the piston’s stroke length to switch between 1kg and 3kg fill volumes, with an accuracy error margin of less than ±1%.
3. Sealing & CuttingAfter filling, the machine performs two key sealing steps to ensure leakproof packaging:
   • Transverse sealing: Heat-sealing bars press the top of the current bag and the bottom of the next bag simultaneously. The sealing temperature and pressure are precisely calibrated to the composite film’s properties, and a cooling cycle is integrated to solidify the seal, preventing it from breaking under the weight of the viscous mayonnaise.
   • Final trimming: A cutting blade separates the continuous bag roll into individual 1kg or 3kg mayonnaise bags. Advanced models may include a notch-cutting function for easy bag opening.
4. Discharge & InspectionFinished bags are discharged onto a conveyor belt, which transports them to downstream inspection stations (e.g., metal detection, weight checking, leak testing) to ensure packaging quality.

Key Features & Advantages

1. Dual-Specification Precision FillingThe machine is optimized for 1kg and 3kg mayonnaise packaging, with a one-click parameter switching function on the PLC touch screen. Operators do not need to replace complex mechanical parts when switching between the two weights, reducing production downtime.
2. Viscosity-Adapted DesignThe retractable piston filler and low-drop filling nozzle eliminate air bubbles in the mayonnaise and prevent material from sticking to sealing edges, ensuring smooth, uniform filling and intact seals. This design also works for other high-viscosity condiments such as salad dressing, ketchup, and mustard.
3. Food-Grade & Hygienic ConstructionAll parts in contact with mayonnaise—including the filling piston, nozzle, hopper, and forming tube—are made of 316 stainless steel, which is corrosion-resistant, easy to clean, and compliant with international food safety standards (FDA, EU 10/2011). The hopper and filling system feature quick-disassembly designs for CIP (Clean-in-Place) or SIP (Sterilize-in-Place) operations, avoiding cross-contamination between batches.
4. Leakproof & Shelf-Life Extending SealingThe combination of high-barrier composite film compatibility and temperature-controlled heat sealing with cooling ensures that the finished bags are 100% leakproof. The airtight seals block oxygen and moisture, preserving the texture and flavor of mayonnaise for extended periods.
5. High Automation & EfficiencyThe machine realizes fully automatic operation from film feeding to finished bag output, reducing manual intervention. For 1kg bags, the production speed can reach 40–60 bags per minute; for 3kg bags, the speed ranges from 20–35 bags per minute, balancing efficiency with packaging quality.

Typical Application Scenarios

This machine is primarily used in the condiment industry for packaging 1kg and 3kg mayonnaise products for retail (supermarkets, convenience stores) and foodservice (restaurants, catering companies). It is also adaptable to other high-viscosity liquid products with similar weight specifications, such as salad dressing, cream sauce, and peanut butter.