Uncover the secrets of the fully automatic packaging machine for bagged whipping cream—and understand the principles and applications of liquid filling machines!

This article provides a comprehensive analysis of the fully automatic liquid soft-packaging machine for bagged dairy products, covering its core definition, automated workflow, significant advantages (high efficiency, low cost, and environmental friendliness), and wide range of application areas (including liquids and viscous materials such as milk, yogurt, and whipping cream). It will help you gain a deeper understanding of this modern liquid packaging solution.

I. Core Definition: What is a Fully Automatic Liquid Soft Packaging Machine?

Fully automatic liquid soft packaging machine Is one. Mechanically integrated seed sowing Automated equipment utilizing electrical, pneumatic, and photoelectric detection technologies. It can automatically handle processes starting from roll-form packaging films. Shipping, bag making, UV sterilization of rolled film, metered filling, date printing, sealing and cutting, to finished product output. the entire process flow. Its core feature lies in... “ Fully automatic ” That is, throughout the entire packaging process—aside from manual loading (of film rolls) and occasional adjustments—no human intervention is required, enabling continuous, efficient, and stable production. It is a key piece of equipment for modern industries such as dairy, food, beverage, and chemical processing to achieve large-scale, standardized production.

II. Working Principle: Unveiling the Entire Process of Automated Packaging

How does a fully automatic liquid soft-packaging machine, like magic, transform a roll of film and a bucket of liquid into beautifully packaged products, one bag at a time? Its operational process can be broken down into the following precise steps:

1. Film unwinding and positioning The equipment automatically pulls the packaging film roll (e.g., PE 、 PET (aluminum-plastic composite films, etc.), which use photoelectric sensors to precisely track color marks on the packaging material, ensuring that the pattern position is consistent for each bag.
2. Forming and Longitudinal Sealing The film is passed through a specially designed forming device, folded into a preset bag shape (such as back-seal or side-seal bags), and then longitudinally sealed by a heat-sealing unit, thereby forming a continuous tubular structure.
3. Transverse sealing and cutting The lateral sealing mechanism thermally seals the film in the vertical direction, simultaneously performing two actions: sealing the top of the current bag and the bottom of the next bag, and cutting in between to form a separate, bottom-sealed bag.
4. Metered filling This is one of the core steps. As the bag moves to the filling station, a high-precision metering pump—such as a servo pump or a gravity-fed filling system—quickly and accurately fills the bag with liquid product according to the preset volume. The entire process is drip-free, effectively preventing cross-contamination.
5. Date printing (optional) Before and after filling, use an inkjet printer or a laser marking machine to print information such as the production date, shelf life, and batch number at the designated locations on the bags.
6. Exhaust and Sealing After filling is complete, the equipment uses a special device (a squeeze mechanism) to remove the air from the top of the bag, and then immediately performs the final transverse sealing to ensure product integrity and freshness.
7. Finished product output The finished bags, after all processes have been completed, are automatically conveyed to a collection bin or connected to the next process (such as a packing machine).
8. CIP Cleaning: Device support CIP Clean the system using the touchscreen to perform the relevant operations.

The entire process cycles repeatedly, forming an efficient and seamless automated production line.

III. Core Advantages: Why Has It Become the Market Mainstream?

Compared to traditional semi-automatic equipment or rigid packaging, fully automatic liquid soft-packaging machines offer greater advantages:

• High efficiency, high productivity Automated continuous production can reach speeds of dozens or even hundreds of bags per minute, far surpassing manual operation and greatly boosting production efficiency.
• Significantly reduce labor costs : One device is all that’s needed. 1 Human monitoring operations have replaced multiple filling and sealing positions, significantly reducing long-term labor costs.
• Low packaging costs Soft packaging materials (roll films) have significantly lower costs than rigid packaging such as bottles and cans, and they also require less storage and transportation space, resulting in lower overall packaging costs.
• Excellent sealing and freshness retention The fully automatic heat-sealing technology ensures the sealing strength of each bag, effectively blocking out oxygen and bacteria to extend product shelf life.
• High-precision filling, reducing waste. It employs a precision metering system, ensuring high filling accuracy and virtually zero material waste, thereby helping companies save on raw materials.
• Highly flexible, multi-purpose in one machine By replacing just a few components (such as the forming device and filling nozzle), the same machine can accommodate packaging requirements for different capacities, different bag types, and different liquids.
• Compliant with environmental trends Soft packaging materials use less material, generate less waste, and some of the materials are recyclable, making them more aligned with modern environmental protection principles.

IV. Wide Range of Applications: Which Products Are Being Used?

The fully automatic liquid soft-packaging machine has an extremely wide range of applications, covering virtually all liquid, semi-liquid, and paste-like products:

• Dairy Pasteurized milk, yogurt, fresh milk, soy milk, light cream, cheese, sweetened condensed milk, and more;
• Liquid egg products: Egg liquid, whole egg liquid, egg white liquid, egg yolk liquid, custard pie filling, and more;
• Seasoning Soy sauce, vinegar, cooking wine, edible oil, oyster sauce, bone broth, ketchup, broad bean paste, and other seasonings;
• Animal and vegetable fats and oils Butter, lard, chicken fat, hot pot soup oil, palm oil, soybean oil, peanut oil, and vegetable oil for Buddhist lamps, etc.;
• Fruit juice beverage Coconut milk, fruit pulp, soy milk, herbal tea, protein beverages, coconut water, fruit juice, and more.
• Daily Chemical and Chemical Products Detergent, hand soap, shampoo, body wash, dishwashing detergent, additives, liquid fertilizers, paraffin wax, coatings, wood finishes, and more.

V. How to Choose the Right Equipment?

When selecting a fully automatic liquid soft packaging machine, companies need to comprehensively consider the following points:

• Product Features The liquid’s viscosity, whether it contains particles, and whether it is corrosive or foaming.
• Capacity requirements According to the day / The monthly production volume determines the required equipment operating speed.
• Packaging specifications The required bag size, capacity, and bag style.
• Budget and Brand Weigh the equipment price, stability, after-sales service, and technical support.

Recommended manufacturers and equipment:

Harbin Saidi Technology Development Co., Ltd.

Created on 1994 Year-round, a professional manufacturer of fully automatic soft packaging machinery and equipment for liquid and viscous material products.

Model: SJYB- III SD-F Model: Dual-head high-speed fully automatic liquid packaging machine

Capacity range: 100-1000ml ; ( 0.1-25L Supports on-demand customization.

Packing speed: ≤ 8000 bag / Hour

Conclusion

In summary, Fully automatic liquid soft packaging machine More than just a simple packaging tool, it is an intelligent production partner that helps companies enhance their core competitiveness and achieve cost reduction and efficiency gains.